Exhibit 10.2

GUARANTY

THIS GUARANTY (as the same may be amended, restated, supplemented or otherwise modified from time to time, this “Guaranty”) is made as of June 27, 2013, by Stepan Specialty Products, LLC, a Delaware limited liability company (together with any Subsidiaries which become parties to this Guaranty by executing a Supplement hereto in the form attached hereto as Annex I, the “Guarantors”), for the benefit of the holders from time to time of the Notes (as defined below) (the “Holders”).

WITNESSETH:

WHEREAS, Stepan Company, a Delaware corporation (the “Borrower”), has entered into that certain Note Purchase Agreement, dated as of June 27, 2013 (the “Note Purchase Agreement”), by and among the Borrower and the purchasers named therein.

WHEREAS, the Borrower has authorized the issuance of and, pursuant to the Note Purchase Agreement, proposes to issue and sell on the date hereof its 3.86% Senior Notes, due June 27, 2025 (the “Notes”) pursuant to the Note Purchase Agreement.

WHEREAS, pursuant to Section 9.8 of the Note Purchase Agreement, the Borrower has agreed that certain of its Subsidiaries (each a “Guarantor” and, collectively, the “Guarantors”) will guarantee the Borrower’s obligations under the Notes and the Note Purchase Agreement;

WHEREAS, the Guarantors hereby execute and deliver this Guaranty, whereby each of the Guarantors, without limitation and with full recourse, shall guarantee the payment when due of all of the “Guaranteed Obligations” (as defined below); and

WHEREAS, the Guarantors each acknowledge that they have and will continue to derive substantial benefits from the issuance of the Notes, and each of the Guarantors is willing to guarantee the Guaranteed Obligations;

NOW, THEREFORE, in consideration of the foregoing premises and other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the parties hereto agree as follows:

SECTION 1. Definitions. Terms defined in the Note Purchase Agreement and not otherwise defined herein have, as used herein, the respective meanings provided for therein.

SECTION 2. Representations, Warranties and Covenants. Each of the Guarantors represents and warrants to each Holder as of the date of this Agreement that:

(A) It (i) is a corporation, partnership or limited liability company, duly incorporated or organized, as the case may be, validly existing and in good standing under the laws of its jurisdiction of incorporation or organization, (ii) is duly qualified to do business as a foreign entity and is in good standing under the laws of each jurisdiction where the business by it makes such qualification necessary, and (iii) has all requisite corporate, partnership or limited liability power and authority, as the case may be, to own, operate and encumber its property and to conduct its business in each jurisdiction in which its business is conducted except to the extent that the failure to have such authority could not reasonably be expected to have a material adverse effect (a) on the business, financial condition, operations or properties of a Guarantor taken as a whole or (b) on its ability to perform its obligations hereunder.

(B) It has the requisite corporate, limited liability company or partnership, as applicable, power and authority and legal right to execute and deliver this Guaranty and to perform its obligations hereunder. The execution and delivery by it of this Guaranty and the performance of each of its obligations hereunder have been duly authorized by proper proceedings, and this Guaranty constitutes a legal, valid and binding obligation of each Guarantor, enforceable against such Guarantor, in accordance with its terms, except as enforceability may be limited by (i) bankruptcy, insolvency, fraudulent conveyances or transfers, reorganization or similar laws relating to or affecting the enforcement of creditors’ rights generally, (ii) general equitable principles (whether considered in a proceeding in equity or at law), and (iii) requirements of reasonableness, good faith and fair dealing.

(C) Neither the execution and delivery by it of this Guaranty, nor the consummation by it of the transactions herein contemplated, nor compliance by it with the terms and provisions hereof, will (i) conflict with the charter or other organizational documents of such Guarantor, (ii) conflict with, result in a breach of or constitute (with or without notice or lapse of time or both) a default under any law, rule, regulation, order, writ, judgment, injunction, decree or award (including, without limitation, any environmental property transfer laws or regulations) applicable to such Guarantor or any provisions of any indenture, instrument or agreement to which such Guarantor is party or is subject or which it or its property is bound or affected, or require termination of any such indenture, instrument or agreement, (iii) result in or require the creation or imposition of any Lien whatsoever upon any of the property or assets of such Guarantor, other than Liens permitted or created by the Note Purchase Agreement, or (iv) require any approval of such Guarantor’s board of directors or shareholders or unitholders except such as have been obtained. The execution, delivery and performance by the Guarantors of this Guaranty do not and will not require any registration with, consent or approval of, or notice to, or other action to, with or by any governmental authority, including under any environmental property transfer laws or regulations, except filings, consents or notices which have been made.

In addition to the foregoing, each of the Guarantors covenants that, so long as any amount is payable under the Note Purchase Agreement or the Notes or any other Guaranteed Obligations shall remain unpaid, it will, and, if necessary, will enable the Borrower to, fully comply with those covenants and agreements of the Borrower applicable to such Guarantor set forth in the Note Purchase Agreement.

SECTION 3. The Guaranty. Each of the Guarantors hereby unconditionally guarantees, jointly with the other Guarantors and severally, as a primary obligor and not merely as a surety, to each Holder and its successors, transfers and assigns, the full and punctual payment and performance when due, whether at stated maturity, upon acceleration or otherwise, of the principal of and Make-Whole Amount and interest on (including, without limitation, interest whether or not an allowable claim, accruing after the date of filing of any petition in bankruptcy, or the commencement of any bankruptcy, insolvency or similar proceeding relating to the Borrower) the Notes issued from time to time, including Additional Notes issued after the date hereof, and all other amounts under the Note Purchase Agreement and all other obligations, agreements and covenants of the Borrower now or hereafter existing under the Note Purchase Agreement whether for principal, Make-Whole Amount, interest (including interest accruing both prior to and subsequent to the commencement of any proceeding against or with respect to the Borrower under any chapter of the Bankruptcy Code), indemnification payments, expenses (including attorneys’ fee and expenses) or otherwise, and all costs and expenses, if any, incurred by any Holder in connection with enforcing any rights under this Guaranty (all of the foregoing being referred to collectively as the “Guaranteed Obligations” and the holders from time to time of the Guaranteed Obligations being referred to collectively as the “Holders of Guaranteed Obligations”). Upon (x) the failure by the Borrower to pay punctually any such amount or perform such obligation, and (y) such failure continuing beyond any applicable grace or notice and cure period, each of the Guarantors agrees that it shall forthwith on demand pay such amount or perform such obligation at the place and in the manner specified in the Note Purchase

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Agreement. Each of the Guarantors hereby agrees that this Guaranty is an absolute, irrevocable, unconditional, present and continuing guaranty of payment and is not a guaranty of collection, and is no way conditioned upon any attempt to collect from the Borrower or any other action, occurrence or circumstance whatsoever.

Notwithstanding any stay, injunction or other prohibition preventing such action against the Borrower, if for any reason whatsoever the Borrower shall fail or be unable duly, punctually and fully to perform and (in the case of the payment of the Guaranteed Obligations) pay such amounts as and when the same shall become due and (in the case of the payment of the Guaranteed Obligations) payable or to perform or comply with any other Guaranteed Obligation, whether or not such failure or inability shall constitute an “Event of Default” under the Note Purchase Agreement or the Notes, each Guarantor will forthwith (in the case of the payment of Guaranteed Obligations) pay or cause to be paid such amounts to the Holders, in lawful money of the United States of America, at the place specified in the Note Purchase Agreement, or perform or comply with such Guaranteed Obligations or cause such Guaranteed Obligations to be performed or complied with, (in the case of the payment of Guaranteed Obligations) together with interest (in the amounts and to the extent required under such Notes) on any amount due and owing.

SECTION 4. Guaranty Unconditional. The obligations of each of the Guarantors hereunder shall be unconditional and absolute and, without limiting the generality of the foregoing, shall not be released, discharged or otherwise affected by:

(A) any extension, renewal, settlement, indulgence, compromise, waiver or release of or with respect to the Guaranteed Obligations or any part thereof or any agreement relating thereto, or with respect to any obligation of any other guarantor of any of the Guaranteed Obligations, whether (in any such case) by operation of law or otherwise, or any failure or omission to enforce any right, power or remedy with respect to the Guaranteed Obligations or any part thereof or any agreement relating thereto, or with respect to any obligation of any other guarantor of any of the Guaranteed Obligations;

(B) any modification or amendment of or supplement to the Note Purchase Agreement, including, without limitation, any such amendment which may increase the amount of, or the interest rates applicable to, any of the Guaranteed Obligations guaranteed hereby;

(C) any release, surrender, compromise, settlement, waiver, subordination or modification, with or without consideration, of any collateral securing the Guaranteed Obligations or any part thereof, any other guaranties with respect to the Guaranteed Obligations or any part thereof, or any other obligation of any person or entity with respect to the Guaranteed Obligations or any part thereof, or any nonperfection or invalidity of any direct or indirect security for the Guaranteed Obligations;

(D) any change in the corporate, partnership or other existence, structure or ownership of the Borrower or any other guarantor of any of the Guaranteed Obligations, or any insolvency, bankruptcy, reorganization or other similar proceeding affecting the Borrower or any other guarantor of the Guaranteed Obligations, or any of their respective assets or any resulting release or discharge of any obligation of the Borrower or any other guarantor of any of the Guaranteed Obligations;

(E) the existence of any claim, setoff or other rights which the Guarantors may have at any time against the Borrower, any other guarantor of any of the Guaranteed Obligations, any Holder of Guaranteed Obligations or any other Person, whether in connection herewith or in connection with any unrelated transactions; provided that nothing herein shall prevent the assertion of any such claim by separate suit or compulsory counterclaim;

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(F) the enforceability or validity of the Guaranteed Obligations or any part thereof or the genuineness, enforceability or validity of any agreement relating thereto or with respect to any collateral securing the Guaranteed Obligations or any part thereof, or any other invalidity or unenforceability relating to or against the Borrower or any other guarantor of any of the Guaranteed Obligations, for any reason related to the Note Purchase Agreement, the Notes or any provision of applicable law, decree, order or regulation of any jurisdiction purporting to prohibit the payment by the Borrower or any other guarantor of the Guaranteed Obligations, of any of the Guaranteed Obligations or otherwise affecting any term of any of the Guaranteed Obligations;

(G) the failure of the Holders to take any steps to perfect and maintain any security interest in, or to preserve any rights to, any security or collateral for the Guaranteed Obligations, if any;

(H) the election by, or on behalf of, any one or more of the Holders of Guaranteed Obligations, in any proceeding instituted under Chapter 11 of Title 11 of the United States Code (11 U.S.C. 101 et seq.) (the “Bankruptcy Code”), of the application of Section 1111(b)(2) of the Bankruptcy Code;

(I) any borrowing or grant of a security interest by the Borrower, as debtor-in-possession, under Section 364 of the Bankruptcy Code;

(J) the disallowance, under Section 502 of the Bankruptcy Code, of all or any portion of the claims of the Holders of Guaranteed Obligations for repayment of all or any part of the Guaranteed Obligations;

(K) the failure of any other guarantor to sign or become party to this Guaranty or any amendment, change, or reaffirmation hereof; or

(L) any other act or omission to act or delay of any kind by the Borrower, any other guarantor of the Guaranteed Obligations, any Holder of Guaranteed Obligations or any other Person or any other circumstance whatsoever which might, but for the provisions of this Section 4, constitute a legal or equitable discharge of any Guarantor’s obligations hereunder except as provided in Section 5.

SECTION 5. Discharge Only Upon Payment In Full: Reinstatement In Certain Circumstances.

(A) Each of the Guarantors’ obligations hereunder shall remain in full force and effect and shall not be discharged until such time as all of the principal of, Make-Whole Amount and interest on the Notes, the other Guaranteed Obligations and all other independent payment obligations of such Guarantor under the Guaranty shall have been paid in full in cash and performed in full, and all of the agreements of each of the other Guarantors hereunder shall be duly paid in cash and performed in full. If at any time any payment of the principal of, Make-Whole Amount, or interest on any Note or any other amount payable by the Borrower or any other party under the Note Purchase Agreement or any Note is rescinded or must be otherwise restored or returned upon the insolvency, bankruptcy or reorganization of the Borrower or otherwise, each of the Guarantors’ obligations hereunder with respect to such payment shall be reinstated as though such payment had been due but not made at such time.

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(B) A Guarantor shall automatically be released from its obligations hereunder in the event that all of the capital stock of such Guarantor shall be sold, transferred or otherwise disposed of, or the assets of such Guarantor shall be sold, transferred or otherwise disposed of substantially in their entirety, in each case to a Person that is not the Borrower in accordance with the terms of the Note Purchase Agreement.

(C) In connection with any termination or release pursuant to paragraph (A) or (B) of this Section 5 the Holders shall execute and deliver to any Guarantor, as the case may be, at such Guarantor’s expense, all documents that such Guarantor shall reasonably request to evidence such termination or release. Any execution and delivery of documents pursuant to this Section 5 shall be without recourse to or warranty by the Holders.

SECTION 6. General Waivers; Additional Waivers.

(A) General Waivers. Each of the Guarantors irrevocably waives acceptance hereof, presentment, demand or action on delinquency, protest, the benefit of any statutes of limitations and, to the fullest extent permitted by law, any notice not provided for herein, as well as any requirement that at any time any action be taken by any Person against the Borrower, any other guarantor of the Guaranteed Obligations, or any other Person.

(B) Additional Waivers. Notwithstanding anything herein to the contrary, each of the Guarantors hereby absolutely, unconditionally, knowingly, and expressly waives:

(i) any right it may have to revoke this Guaranty as to future indebtedness or notice of acceptance hereof;

(ii) (a) notice of acceptance hereof; (b) notice of any financial accommodations made or extended under the Note Purchase Agreement or the creation or existence of any Guaranteed Obligations; (c) notice of the amount of the Guaranteed Obligations, subject, however, to each Guarantor’s right to make inquiry of the Holders of Guaranteed Obligations to ascertain the amount of the Guaranteed Obligations at any reasonable time; (d) notice of any adverse change in the financial condition of the Borrower or of any other fact that might increase such Guarantor’s risk hereunder; (e) notice of presentment for payment, demand, protest, and notice thereof as to any instruments under the Note Purchase Agreement or the Notes; (f) notice of any Default or Event of Default; and (g) all other notices (except if such notice is specifically required to be given to such Guarantor hereunder or under the Note Purchase Agreement) and demands to which each Guarantor might otherwise be entitled;

(iii) its right, if any, to require the Holders of Guaranteed Obligations to institute suit against, or to exhaust any rights and remedies which the Holders of Guaranteed Obligations have or may have against, the other Guarantors or any third party, or against any collateral provided by the other Guarantors, or any third party; and each Guarantor further waives any defense arising by reason of any disability or other defense (other than the defense that the Guaranteed Obligations shall have been fully and finally performed and indefeasibly paid) of the other Guarantors or by reason of the cessation from any cause whatsoever of the liability of the other Guarantors in respect thereof;

(iv) (a) any rights to assert against the Holders of Guaranteed Obligations any defense (legal or equitable), set-off, counterclaim, or claim which such Guarantor may now or at any time hereafter have against the other Guarantors or any other party liable to the Holders of

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Guaranteed Obligations; (b) any defense, set-off, counterclaim, or claim, of any kind or nature, arising directly or indirectly from the present or future lack of perfection, sufficiency, validity, or enforceability of the Guaranteed Obligations or any security therefor; (c) any defense such Guarantor has to performance hereunder, and any right such Guarantor has to be exonerated, arising by reason of: the impairment or suspension of the Holders of Guaranteed Obligations’ rights or remedies against the other Guarantors; the alteration by the Holders of Guaranteed Obligations of the Guaranteed Obligations; any discharge of the other Guarantors’ obligations to the Holders of Guaranteed Obligations by operation of law as a result of the Holders of Guaranteed Obligations’ intervention or omission; or the acceptance by the Holders of Guaranteed Obligations of anything in partial satisfaction of the Guaranteed Obligations; and (d) the benefit of any statute of limitations affecting such Guarantor’s liability hereunder or the enforcement thereof, and any act which shall defer or delay the operation of any statute of limitations applicable to the Guaranteed Obligations shall similarly operate to defer or delay the operation of such statute of limitations applicable to such Guarantor’s liability hereunder; and

(v) any defense arising by reason of or deriving from (a) any claim or defense based upon an election of remedies by the Holders of Guaranteed Obligations; or (b) any election by the Holders of Guaranteed Obligations under Section 1111(b) of Title 11 of the United States Code entitled “Bankruptcy”, as now and hereafter in effect (or any successor statute), to limit the amount of, or any collateral securing, its claim against the Guarantors.

SECTION 7. Subordination of Subrogation; Subordination of Intercompany Indebtedness.

(A) Subordination of Subrogation. Until the Guaranteed Obligations have been fully and finally performed and indefeasibly paid in full in cash (other than contingent indemnity obligations), the Guarantors (i) shall have no right of subrogation with respect to such Guaranteed Obligations and (ii) waive any right to enforce any remedy which the Holders of Guaranteed Obligations now have or may hereafter have against the Borrower, any endorser or any guarantor of all or any part of the Guaranteed Obligations or any other Person, and the Guarantors waive any benefit of, and any right to participate in, any security or collateral given to the Holders of Guaranteed Obligations to secure the payment or performance of all or any part of the Guaranteed Obligations or any other liability of the Borrower to the Holders of Guaranteed Obligations. Should any Guarantor have the right, notwithstanding the foregoing, to exercise its subrogation rights, each Guarantor hereby expressly and irrevocably (a) subordinates any and all rights at law or in equity to subrogation, reimbursement, exoneration, contribution, indemnification or set off that such Guarantor may have to the indefeasible payment in full in cash of the Guaranteed Obligations (other than contingent indemnity obligations) and (b) waives any and all defenses available to a surety, guarantor or accommodation co-obligor until the Guaranteed Obligations are indefeasibly paid in full in cash and performed in full. Each Guarantor acknowledges and agrees that this subordination is intended to benefit the Holders of Guaranteed Obligations and shall not limit or otherwise affect such Guarantor’s liability hereunder or the enforceability of this Guaranty, and that the Holders of Guaranteed Obligations and their successors and assigns are intended third party beneficiaries of the waivers and agreements set forth in this Section 7(A).

(B) Subordination of Intercompany Indebtedness. Each Guarantor agrees that any and all claims of such Guarantor against the Borrower or any other Guarantor hereunder (each an “Obligor”) with respect to any “Intercompany Indebtedness” (as hereinafter defined), any endorser, obligor or any other guarantor of all or any part of the Guaranteed Obligations, or against any of its properties shall be subordinate and subject in right of payment to the prior payment, in full and in cash, of all Guaranteed Obligations; provided that, as long as no Event of

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Default has occurred and is continuing, such Guarantor may receive payments of principal and interest from any Obligor with respect to Intercompany Indebtedness. Notwithstanding any right of any Guarantor to ask, demand, sue for, take or receive any payment from any Obligor, all rights, liens and security interests of such Guarantor, whether now or hereafter arising and howsoever existing, in any assets of any other Obligor shall be and are subordinated to the rights of the Holders of Guaranteed Obligations in those assets. No Guarantor shall have any right to possession of any such asset or to foreclose upon any such asset, whether by judicial action or otherwise, unless and until all of the Guaranteed Obligations shall have been fully paid and satisfied (in cash) and fully performed. If all or any part of the assets of any Obligor, or the proceeds thereof, are subject to any distribution, division or application to the creditors of such Obligor, whether partial or complete, voluntary or involuntary, and whether by reason of liquidation, bankruptcy, arrangement, receivership, assignment for the benefit of creditors or any other action or proceeding, or if the business of any such Obligor is dissolved or if substantially all of the assets of any such Obligor are sold, then, and in any such event (such events being herein referred to as an “Insolvency Event”), any payment or distribution of any kind or character, either in cash, securities or other property, which shall be payable or deliverable upon or with respect to any indebtedness of any Obligor to any Guarantor (“Intercompany Indebtedness”) shall be paid or delivered directly to the Holders for application on any of the Guaranteed Obligations, due or to become due, until such Guaranteed Obligations shall have first been fully paid and satisfied (in cash). Should any payment, distribution, security or instrument or proceeds thereof be received by the applicable Guarantor upon or with respect to the Intercompany Indebtedness after any Insolvency Event and prior to the satisfaction of all of the Guaranteed Obligations, such Guarantor shall receive and hold the same in trust, as trustee, for the benefit of the Holders of Guaranteed Obligations and shall forthwith deliver the same to the Holders of Guaranteed Obligations, in precisely the form received (except for the endorsement or assignment of the Guarantor where necessary), for application to any of the Guaranteed Obligations, due or not due, and, until so delivered, the same shall be held in trust by the Guarantor as the property of the Holders of Guaranteed Obligations. If any such Guarantor fails to make any such endorsement or assignment to the Holders of Guaranteed Obligations, the Holders of Guaranteed Obligations or any of their officers or employees are irrevocably authorized to make the same. Each Guarantor agrees that until the Guaranteed Obligations (other than the contingent indemnity obligations) have been paid in full (in cash) and satisfied and fully performed, no Guarantor will assign or transfer to any Person any claim any such Guarantor has or may have against any Obligor.

SECTION 8. Contribution with Respect to Guaranteed Obligations.

(A) To the extent that any Guarantor shall make a payment under this Guaranty (a “Guarantor Payment”) which, taking into account all other Guarantor Payments then previously or concurrently made by any other Guarantor, exceeds the amount which otherwise would have been paid by or attributable to such Guarantor if each Guarantor had paid the aggregate Guaranteed Obligations satisfied by such Guarantor Payment in the same proportion as such Guarantor’s “Allocable Amount” (as defined below) (as determined immediately prior to such Guarantor Payment) bore to the aggregate Allocable Amounts of each of the Guarantors as determined immediately prior to the making of such Guarantor Payment, then, following indefeasible payment in full in cash of the Guaranteed Obligations and termination of the Note Purchase Agreement, such Guarantor shall be entitled to receive contribution and indemnification payments from, and be reimbursed by, each other Guarantor for the amount of such excess, pro rata based upon their respective Allocable Amounts in effect immediately prior to such Guarantor Payment.

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(B) As of any date of determination, the “Allocable Amount” of any Guarantor shall be equal to the excess of the fair value of the property of such Guarantor over the total liabilities of such Guarantor (including the maximum amount reasonably expected to become due in respect of contingent liabilities, calculated, without duplication, assuming each other Guarantor that is also liable for such contingent liability pays its ratable share thereof), giving effect to all payments made by other Guarantors as of such date in a manner to maximize the amount of such contributions.

(C) This Section 8 is intended only to define the relative rights of the Guarantors, and nothing set forth in this Section 8 is intended to or shall impair the obligations of the Guarantors, jointly and severally, to pay any amounts as and when the same shall become due and payable in accordance with the terms of this Guaranty.

(D) The parties hereto acknowledge that the rights of contribution and indemnification hereunder shall constitute assets of the Guarantor or Guarantors to which such contribution and indemnification is owing.

(E) The rights of the indemnifying Guarantors against other Guarantors under this Section 8 shall be exercisable upon the full and indefeasible payment of the Guaranteed Obligations in cash, the performance in full of the Guaranteed Obligations and the termination of the Note Purchase Agreement.

(F) In determining the solvency of any Guarantor, it is the intention of the parties hereto that any rights of subrogation or contribution which such Guarantor may have under this Guaranty, any other agreement or applicable law shall be taken into account.

SECTION 9. Limitation of Obligations. Notwithstanding any other provision of this Guaranty, each Guarantor’s obligation to pay the amount guaranteed by each Guarantor hereunder shall be limited to the extent, if any, required so that its obligations hereunder shall not be subject to avoidance under Section 548 of the Bankruptcy Code or under any applicable state Uniform Fraudulent Transfer Act, Uniform Fraudulent Conveyance Act or similar statute or common law.

SECTION 10. Stay of Acceleration. If acceleration of the time for payment of any amount payable by the Borrower under the Note Purchase Agreement or any Note is stayed upon the insolvency, bankruptcy or reorganization of the Borrower, all such amounts otherwise subject to acceleration under the terms of the Note Purchase Agreement or any Note shall nonetheless be payable by each of the Guarantors hereunder forthwith on demand by the Holders.

SECTION 11. Notices. All notices, requests and other communications to any party hereunder shall be given in the manner prescribed in the Note Purchase Agreement with respect to the Holders at their notice address therein and with respect to any Guarantor, in care of the Borrower at the address of the Borrower set forth in the Note Purchase Agreement or such other address or telecopy number as such party may hereafter specify for such purpose by notice in accordance with the provisions of the Note Purchase Agreement.

SECTION 12. No Waivers. No failure or delay by the Holder of Guaranteed Obligations in exercising any right, power or privilege hereunder shall operate as a waiver thereof nor shall any single or partial exercise thereof preclude any other or further exercise thereof or the exercise of any other right, power or privilege. The rights and remedies provided in this Guaranty, the Note Purchase Agreement, and the Notes shall be cumulative and not exclusive of any rights or remedies provided by law.

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SECTION 13. Successors and Assigns. This Guaranty is for the benefit of the Holders and the Holders of Guaranteed Obligations and their respective successors, transfers and permitted assigns; provided, that no Guarantor shall have any right to assign its rights or obligations hereunder without the consent of all of the Holders, and any such assignment in violation of this Section 13 shall be null and void; and in the event of an assignment of any amounts payable under the Note Purchase Agreement or the Notes in accordance with the respective terms thereof, the rights hereunder, to the extent applicable to the indebtedness so assigned, may be transferred with such indebtedness. This Guaranty shall be binding upon each of the Guarantors and their respective successors and assigns.

SECTION 14. Changes in Writing. Other than in connection with the addition of additional Subsidiaries, which become parties hereto by executing a supplement hereto in the form attached as Annex I, neither this Guaranty nor any provision hereof may be changed, waived, discharged or terminated orally, but only in writing signed by each of the Guarantors and the Holders.

SECTION 15. GOVERNING LAW. THIS GUARANTY SHALL BE CONSTRUED IN ACCORDANCE WITH AND GOVERNED BY THE LAW OF THE STATE OF NEW YORK.

SECTION 16. CONSENT TO JURISDICTION; SERVICE OF PROCESS; JURY TRIAL.

(A) CONSENT TO JURISDICTION. EACH GUARANTOR HEREBY IRREVOCABLY SUBMITS TO THE NON-EXCLUSIVE JURISDICTION OF ANY NEW YORK STATE OR FEDERAL COURT SITTING IN THE BOROUGH OF MANHATTAN, THE CITY OF NEW YORK, AND ANY APPELLATE COURT FROM ANY THEREOF, IN ANY ACTION OR PROCEEDING ARISING OUT OF OR RELATING TO THE NOTE PURCHASE AGREEMENT OR ANY NOTE AND EACH GUARANTOR HEREBY IRREVOCABLY AGREES THAT ALL CLAIMS IN RESPECT OF SUCH ACTION OR PROCEEDING MAY BE HEARD AND DETERMINED IN ANY SUCH COURT AND IRREVOCABLY WAIVES ANY OBJECTION IT MAY NOW OR HEREAFTER HAVE AS TO THE VENUE OF ANY SUCH SUIT, ACTION OR PROCEEDING BROUGHT IN SUCH A COURT OR THAT SUCH COURT IS AN INCONVENIENT FORUM. NOTHING HEREIN SHALL LIMIT THE RIGHT OF ANY HOLDER OF GUARANTEED OBLIGATIONS TO BRING PROCEEDINGS AGAINST ANY GUARANTOR IN THE COURTS OF ANY OTHER JURISDICTION. ANY JUDICIAL PROCEEDING BY ANY GUARANTOR AGAINST ANY HOLDER OF GUARANTEED OBLIGATIONS INVOLVING, DIRECTLY OR INDIRECTLY, ANY MATTER IN ANY WAY ARISING OUT OF, RELATED TO, OR CONNECTED WITH THIS GUARANTY OR ANY OTHER RELATED DOCUMENT SHALL BE BROUGHT ONLY IN A COURT SITTING IN THE BOROUGH OF MANHATTAN, THE CITY OF NEW YORK.

(B) WAIVER OF JURY TRIAL. EACH GUARANTOR HEREBY WAIVES TRIAL BY JURY IN ANY JUDICIAL PROCEEDING INVOLVING, DIRECTLY OR INDIRECTLY, ANY MATTER (WHETHER SOUNDING IN TORT, CONTRACT OR OTHERWISE) IN ANY WAY ARISING OUT OF, RELATED TO, OR CONNECTED WITH THIS GUARANTY, THE NOTE PURCHASE AGREEMENT OR ANY NOTE OR THE RELATIONSHIP ESTABLISHED THEREUNDER.

SECTION 17. No Strict Construction. The parties hereto have participated jointly in the negotiation and drafting of this Guaranty. In the event an ambiguity or question of intent or interpretation arises, this Guaranty shall be construed as if drafted jointly by the parties hereto and no presumption or burden of proof shall arise favoring or disfavoring any party by virtue of the authorship of any provisions of this Guaranty.

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SECTION 18. Taxes, Expenses of Enforcement, etc.

(A) Taxes.

(i) All payments by any Guarantor to or for the account of any Holder of Guaranteed Obligations hereunder or under any promissory note shall be made free and clear of and without deduction for any and all taxes. If any Guarantor shall be required by law to deduct any taxes from or in respect of any sum payable hereunder to any Holder of Guaranteed Obligations, (a) the sum payable shall be increased as necessary so that after making all required deductions (including deductions applicable to additional sums payable under this Section 18(A)) such Holder or Holder of Guaranteed Obligations (as the case may be) receives an amount equal to the sum it would have received had no such deductions been made, (b) such Guarantor shall make such deductions, (c) such Guarantor shall pay the full amount deducted to the relevant authority in accordance with applicable law and (d) such Guarantor shall furnish to the Holders the original copy of a receipt evidencing payment thereof within ten (10) days after such payment is made.

(ii) In addition, the Guarantors hereby agree to pay any present or future stamp or documentary taxes and any other excise or property taxes, charges or similar levies which arise from any payment made hereunder or under any promissory note or from the execution or delivery of, or otherwise with respect to, this Guaranty or any promissory note (“Other Taxes”).

(iii) The Guarantors hereby agree to indemnify the Holder of Guaranteed Obligations for the full amount of taxes or Other Taxes (including, without limitation, any taxes or Other Taxes imposed on amounts payable under this Section 18(A)) paid by any Holder or Holder of Guaranteed Obligations and any liability (including penalties, interest and expenses) arising therefrom or with respect thereto. Payments due under this indemnification shall be made within thirty (30) days of the date the Holder of Guaranteed Obligations makes demand therefor.

(B) Expenses of Enforcement, Etc. Subject to the terms of the Note Purchase Agreement, after the occurrence of a Default under the Note Purchase Agreement, the Holders shall have the right at any time to commence enforcement proceedings with respect to the Guaranteed Obligations. The Guarantors agree to reimburse the Holders and Holders of Guaranteed Obligations for any costs and out-of-pocket expenses (including reasonable attorneys’ fees and time charges of attorneys for the Holders), paid or incurred by any Holder or Holder of Guaranteed Obligations in connection with the collection and enforcement of amounts due under the Note Purchase Agreement, the Notes and this Guaranty.

SECTION 19. Setoff. At any time after all or any part of the Guaranteed Obligations have become due and payable (by acceleration or otherwise), each Holder of Guaranteed Obligations may, without notice to any Guarantor and regardless of the acceptance of any security or collateral for the payment hereof, appropriate and apply in accordance with the terms of the Note Purchase Agreement and the Notes toward the payment of all or any part of the Guaranteed Obligations (i) any indebtedness due or to become due from such Holder of Guaranteed Obligations to any Guarantor, and (ii) any moneys, credits or other property belonging to any Guarantor, at any time held by or coming into the possession of such Holder of Guaranteed Obligations or any of their respective affiliates.

SECTION 20. Financial Information. Each Guarantor hereby assumes responsibility for keeping itself informed of the financial condition of the Borrower and any and all endorsers and/or other Guarantors of all or any part of the Guaranteed Obligations, and of all other circumstances bearing upon the risk of nonpayment of the Guaranteed Obligations, or any part thereof, that diligent inquiry would reveal, and each Guarantor hereby agrees that none of the Holders of Guaranteed Obligations shall have

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any duty to advise such Guarantor of information known to any of them regarding such condition or any such circumstances. In the event any Holder of Guaranteed Obligations in its sole discretion, undertakes at any time or from time to time to provide any such information to a Guarantor, such Holder of Guaranteed Obligations shall be under no obligation (i) to undertake any investigation not a part of its regular business routine, (ii) to disclose any information which such Holder of Guaranteed Obligations, pursuant to accepted or reasonable commercial finance practices, wishes to maintain confidential or (iii) to make any other or future disclosures of such information or any other information to such Guarantor.

SECTION 21. Severability. Wherever possible, each provision of this Guaranty shall be interpreted in such manner as to be effective and valid under applicable law, but if any provision of this Guaranty shall be prohibited by or invalid under such law, such provision shall be ineffective to the extent of such prohibition or invalidity without invalidating the remainder of such provision or the remaining provisions of this Guaranty.

SECTION 22. Merger. This Guaranty represents the final agreement of each of the Guarantors with respect to the matters contained herein and may not be contradicted by evidence of prior or contemporaneous agreements, or subsequent oral agreements, between the Guarantor and any Holder of Guaranteed Obligations.

SECTION 23. Headings. Section headings in this Guaranty are for convenience of reference only and shall not govern the interpretation of any provision of this Guaranty.

[SIGNATURE PAGES TO FOLLOW]

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IN WITNESS WHEREOF, the Guarantor has caused this Guaranty to be duly executed by its authorized officer as of the day and year first above written.

ANNEX I TO GUARANTY

Reference is hereby made to the Guaranty (as the same may be amended, restated, supplemented or otherwise modified from time to time, the “Guaranty”), dated as of October     , 2011, made by Stepan Specialty Products, LLC, a Delaware limited liability company (together with any Subsidiaries which become parties to the Guaranty by executing a Supplement thereto substantially similar in form and substance hereto, the “Guarantors”), for the benefit of the Holders. Each capitalized term used herein and not defined herein shall have the meaning given to it in the Guaranty. By its execution below, the undersigned, [NAME OF NEW GUARANTOR], a [corporation] [partnership] [limited liability company] (the “New Guarantor”), agrees to become, and does hereby become, a Guarantor under the Guaranty and agrees to be bound by such Guaranty as if originally a party thereto. By its execution below, the undersigned represents and warrants as to itself that all of the representations and warranties contained in Section 1 of the Guaranty are true and correct in all respects as of the date hereof.

IN WITNESS WHEREOF, the New Guarantor has executed and delivered this Annex I counterpart to the Guaranty as of this      day of             ,     .