Exhibit 3.3

SECOND AMENDED AND RESTATED BYLAWS

OF

SOLUTIA INC.

ARTICLE I

Meetings of Stockholders

Section 1.1. Annual Meetings. The annual meeting of stockholders for the election of directors and for the transaction of such other business as may properly come before the meeting shall be held each year at such date and time, within or without the State of Delaware, as the Board of Directors shall determine.

Section 1.2. Special Meetings. Special meetings of stockholders for any purpose or purposes may be called at any time by order of the Board of Directors or by stockholders holding together at least a majority of all the shares of the corporation entitled to vote at the meeting, and shall be held at such date and time, within or outside the State of Delaware, as may be specified by such order. Whenever the directors shall fail to fix such place, the meeting shall be held at the principal executive office of the corporation.

Section 1.3. Notice of Meetings. Written notice of all meetings of the stockholders, stating the place (if any), date and hour of the meeting, the means of remote communications, if any, by which stockholders and proxy holders may be deemed to be present in person and vote at such meeting, and the place within the city or other municipality or community at which the list of stockholders may be examined, shall be mailed or delivered to each stockholder not less than ten (10) nor more than sixty (60) days prior to the meeting. Notice of any special meeting shall state in general terms the purpose or purposes for which the meeting is to be held.

Section 1.4. Stockholder Lists. The officer who has charge of the stock ledger of the corporation shall prepare and make, at least ten (10) days before every meeting of stockholders, a complete list of the stockholders entitled to vote at the meeting, arranged in alphabetical order, and showing the address of each stockholder and the number of shares registered in the name of each stockholder. Such list shall be open to the examination of any stockholder, for any purpose germane to the meeting, either at a place within the city where the meeting is to be held, which place shall be specified in the notice of the meeting, or, if not so specified, at the place where the meeting is to be held. The list shall also be produced and kept at the time and place of the meeting during the whole time thereof, and may be inspected by any stockholder who is present.

The stock ledger shall be the only evidence as to who are the stockholders entitled to examine the stock ledger, the list required by this section or the books of the corporation, or to vote in person or by proxy at any meeting of stockholders.

Section 1.5. Quorum. Except as otherwise provided by law or the corporation’s certificate of incorporation, a quorum for the transaction of business at any meeting of stockholders shall consist of the holders of record of a majority of the issued and outstanding

shares of the capital stock of the corporation entitled to vote at the meeting, present in person or by proxy. If there be no such quorum, the holders of a majority of such shares so present or represented may adjourn the meeting from time to time, without further notice, until a quorum shall have been obtained. When a quorum is once present it is not broken by the subsequent withdrawal of any stockholder.

Section 1.6. Organization. Meetings of stockholders shall be presided over by the Chairman, if any, or if none or in the Chairman’s absence the Vice-Chairman, if any, or if none or in the Vice-Chairman’s absence the President, if any, or if none or in the President’s absence a Vice-President, or, if none of the foregoing is present, by a chairman to be chosen by the stockholders entitled to vote who are present in person or by proxy at the meeting. The Secretary of the corporation, or in the Secretary’s absence an Assistant Secretary, shall act as secretary of every meeting, but if neither the Secretary nor an Assistant Secretary is present, the presiding officer of the meeting shall appoint any person present to act as secretary of the meeting.

Section 1.7. Voting; Proxies; Required Vote. At each meeting of stockholders, every stockholder shall be entitled to vote in person or by proxy appointed by instrument in writing, subscribed by such stockholder or by such stockholder’s duly authorized attorney-in-fact (but no such proxy shall be voted or acted upon after one (1) year from its date, unless the proxy provides for a longer period), and shall have one vote for each share of stock entitled to vote registered in the name of such stockholder on the books of the corporation on the applicable record date fixed pursuant to these bylaws. At all elections of directors the voting may but need not be by ballot and a plurality of the votes of the shares present in person or represented by proxy at the meeting and entitled to vote on the election of directors shall elect. Except as otherwise required by law or the certificate of incorporation, any other action shall be authorized by the vote of the majority of the shares present in person or represented by proxy at the meeting and entitled to vote on the subject matter.

Section 1.8. Record Date for Stockholder Notice and Voting. For purposes of determining the stockholders entitled to notice of any meeting or to vote, or entitled to receive payment of any dividend or other distribution, or entitled to exercise any right in respect of any change, conversion or exchange of stock or for the purpose of any other lawful action, the Board of Directors may fix, in advance, a record date, which shall not be more than sixty (60) days nor less than ten (10) days before the date of any such meeting nor more than sixty (60) days before any other action. If the Board of Directors does not so fix a record date, the record date for determining stockholders entitled to notice of or to vote at a meeting of stockholders shall be at the close of business on the business day next preceding the day on which notice is given or, if notice is waived, at the close of business on the business day next preceding the day on which the meeting is held.

Section 1.9. Action by Written Consent. Any action required or permitted to be taken at any meeting of stockholders may, except as otherwise required by law or the certificate of incorporation, be taken without a meeting, without prior notice and without a vote, if a consent in writing, setting forth the action so taken, shall be signed by the holders of record of the issued and outstanding capital stock of the corporation having not less than the minimum number of votes that would be necessary to authorize or take such action at a meeting at which all shares entitled to vote thereon were present and voted, and the writing or writings are filed with the

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permanent records of the corporation. Prompt notice of the taking of corporate action without a meeting by less than unanimous written consent shall be given to those stockholders who have not consented in writing.

Section 1.10. Inspectors. The Board of Directors, in advance of any meeting, may, but need not, appoint one or more inspectors of election to act at the meeting or any adjournment thereof. If an inspector or inspectors are not so appointed, the person presiding at the meeting may, but need not, appoint one or more inspectors. In case any person who may be appointed as an inspector fails to appear or act, the vacancy may be filled by appointment made by the directors in advance of the meeting or at the meeting by the person presiding thereat. Each inspector, if any, before entering upon the discharge of his or her duties, shall take and sign an oath faithfully to execute the duties of inspector at such meeting with strict impartiality and according to the best of his ability. The inspectors, if any, shall determine the number of shares of stock outstanding and the voting power of each, the shares of stock represented at the meeting, the existence of a quorum, and the validity and effect of proxies, and shall receive votes, ballots or consents, hear and determine all challenges and questions arising in connection with the right to vote, count and tabulate all votes, ballots or consents, determine the result, and do such acts as are proper to conduct the election or vote with fairness to all stockholders. On request of the person presiding at the meeting, the inspector or inspectors, if any, shall make a report in writing of any challenge, question or matter determined by such inspector or inspectors and execute a certificate of any fact found by such inspector or inspectors.

ARTICLE II

Board of Directors

Section 2.1. General Powers. The business of the corporation shall be managed by or under the direction of the Board of Directors which may exercise all such powers of the corporation and do all such lawful acts and things which are not by statute or by the certificate of incorporation or by these bylaws directed or required to be exercised or done by the stockholders, or prohibited to the Board of Directors.

Section 2.2. Qualification; Number; Term; Remuneration. (a) Each director shall be at least 18 years of age. A director need not be a stockholder or a resident of the State of Delaware. The Board of Directors shall consist of one or more members, the number thereof to be determined from time to time by resolutions of the Board of Directors.

(b) Directors who are elected at an annual meeting of stockholders, and directors who are elected in the interim to fill vacancies and newly created directorships, shall hold office until the next annual meeting of stockholders and until their successors are elected and qualified or until their earlier resignation or removal.

(c) Directors may be paid their expenses, if any, of attendance at each meeting of the Board of Directors and may be paid a fixed sum for attendance at each meeting of the Board of Directors or a stated salary as director. No such payment shall preclude any director from serving the corporation in any other capacity and receiving compensation therefore. Members of special or standing committees may be allowed like compensation for attending committee meetings.

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Section 2.3. Quorum and Manner of Voting. Except as otherwise provided by law, a majority of the entire Board of Directors shall constitute a quorum. A majority of the directors present, whether or not a quorum is present, may adjourn a meeting from time to time to another time and place without notice. The vote of the majority of the directors present at a meeting at which a quorum is present shall be the act of the Board of Directors.

Section 2.4. Place of Meetings. Meetings of the Board of Directors may be held at any place within or outside the State of Delaware, as may from time to time be fixed by resolution of the Board of Directors, or as may be specified in the notice of meeting.

Section 2.5. Annual Meeting. Following the annual meeting of stockholders, the newly elected Board of Directors shall meet for the purpose of the election of officers and the transaction of such other business as may properly come before the meeting. Such meeting may be held without notice immediately after the annual meeting of stockholders at the same place at which such stockholders’ meeting is held.

Section 2.6. Regular Meetings. Regular meetings of the Board of Directors shall be held at such times and places as the Board of Directors shall from time to time by resolution determine. Notice need not be given of regular meetings of the Board of Directors held at times and places fixed by resolution of the Board of Directors.

Section 2.7. Special Meetings. Special meetings of the Board of Directors shall be held whenever called by the Chairman of the Board, President or by a majority of the directors then in office.

Section 2.8. Notice of Meetings. A notice of the place, date and time and the purpose or purposes of each meeting of the Board of Directors shall be given to each director by mailing the same at least two (2) days before the special meeting, or by telephoning or emailing the same or by delivering the same personally not later than the day before the day of the meeting.

Section 2.9. Organization. At all meetings of the Board of Directors, the Chairman, if any, or if none or in the Chairman’s absence or inability to act the President, or in the President’s absence or inability to act any Vice-President who is a member of the Board of Directors, or in such Vice-President’s absence or inability to act a chairman chosen by the directors, shall preside. The Secretary of the corporation shall act as secretary at all meetings of the Board of Directors when present, and, in the Secretary’s absence, the presiding officer may appoint any person to act as secretary.

Section 2.10. Telephonic Meetings. Unless otherwise restricted by the certificate of incorporation of these bylaws, any member of the Board of Directors or any committee may participate in a meeting by means of conference telephone or similar communications equipment by means of which all persons participating in the meeting can hear each other, and such participation in a meeting shall constitute presence in person at the meeting.

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Section 2.11. Resignation. Any director may resign at any time upon written notice to the corporation and such resignation shall take effect upon receipt thereof by the President or Secretary, unless otherwise specified in the resignation. Any or all of the directors may be removed, with or without cause, by the holders of a majority of the shares of stock outstanding and entitled to vote for the election of directors.

Section 2.12. Vacancies. Unless otherwise provided in these bylaws, vacancies on the Board of Directors, whether caused by resignation, death, disqualification, removal, an increase in the authorized number of directors or otherwise, may be filled by the affirmative vote of a majority of the remaining directors, although less than a quorum, or by a sole remaining director, or at a special meeting of the stockholders, by the holders of shares entitled to vote for the election of directors.

Section 2.13. Action by Written Consent. Any action required or permitted to be taken at any meeting of the Board of Directors may be taken without a meeting if all the directors consent thereto in writing, and the writing or writings are filed with the minutes of proceedings of the Board of Directors.

ARTICLE III

Committees

Section 3.1. Appointment. From time to time the Board of Directors by a resolution adopted by a majority of the entire Board of Directors may appoint any committee or committees for any purpose or purposes, to the extent lawful, which shall have powers as shall be determined and specified by the Board of Directors in the resolution of appointment.

Section 3.2. Procedures, Quorum and Manner of Acting. Each committee shall fix its own rules of procedure, and shall meet where and as provided by such rules or by resolution of the Board of Directors. Except as otherwise provided by law, the presence of a majority of the then appointed members of a committee shall constitute a quorum for the transaction of business by that committee, and in every case where a quorum is present the affirmative vote of a majority of the members of the committee present shall be the act of the committee. Each committee shall keep minutes of its proceedings, and actions taken by a committee shall be reported to the Board of Directors.

Section 3.3. Action by Written Consent. Any action required or permitted to be taken at any meeting of any committee of the Board of Directors may be taken without a meeting if all the members of the committee consent thereto in writing, and the writing or writings are filed with the minutes of proceedings of the committee.

Section 3.4. Term; Termination. In the event any person shall cease to be a director of the corporation, such person shall simultaneously therewith cease to be a member of any committee appointed by the Board of Directors.

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ARTICLE IV

Officers

Section 4.1. Election and Qualifications. The Board of Directors shall elect the officers of the corporation, which shall include a President and a Secretary, and may include, by election or appointment, one or more Vice-Presidents (any one or more of whom may be given an additional designation of rank or function), a Treasurer and such assistant secretaries, such Assistant Treasurers and such other officers as the Board of Directors may from time to time deem proper. Each officer shall have such powers and duties as may be prescribed by these bylaws and as may be assigned by the Board of Directors or the President. Any two or more offices may be held by the same person.

Section 4.2. Term of Office and Compensation. The term of office of all officers shall be one (1) year and until their respective successors have been elected and qualified, but any officer may be removed from office, either with or without cause, at any time by the Board of Directors. Any vacancy in any office arising from any cause may be filled for the unexpired portion of the term by the Board of Directors. The compensation of all officers of the corporation may be fixed by the Board of Directors or in such manner as the Board of Directors shall provide.

Section 4.3. Resignation; Removal. Any officer may resign at any time upon written notice to the corporation and such resignation shall take effect upon receipt thereof by the President or Secretary, unless otherwise specified in the resignation. Any officer shall be subject to removal, with or without cause, at any time by vote of a majority of the entire Board of Directors.

Section 4.4. Chairman of the Board. The Chairman of the Board, if there be one, shall preside at all meetings of the Board of Directors and shall have such other powers and duties as may from time to time be assigned by the Board of Directors.

Section 4.5. President and Chief Executive Officer. The President shall be the chief executive officer of the Corporation, and shall have such duties as customarily pertain to that office. The President shall have general management and supervision of the property, business and affairs of the corporation and over its other officers; may appoint and remove assistant officers and other agents and employees, other than officers referred to in Section 4.1 of this Article IV; and may execute and deliver in the name of the corporation powers of attorney, contracts, bonds and other obligations and instruments.

Section 4.6. Vice-President. A Vice-President may execute and deliver in the name of the corporation contracts and other obligations and instruments pertaining to the regular course of the duties of said office, and shall have such other authority as from time to time may be assigned by the Board of Directors or the President.

Section 4.7. Treasurer. The Treasurer shall in general have all duties incident to the position of Treasurer and such other duties as may be assigned by the Board of Directors or the President.

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Section 4.8. Secretary. The Secretary shall in general have all the duties incident to the office of Secretary and such other duties as may be assigned by the Board of Directors or the President.

Section 4.9. Assistant Officers. Any assistant officer shall have such powers and duties of the officer such assistant officer assists as such officer or the Board of Directors shall from time to time prescribe.

ARTICLE V

Stock

Section 5.1. Certificates; Signatures. The shares of the corporation shall be represented by certificates, provided that the Board of Directors of the corporation may provide by resolution or resolutions that some or all of any or all classes or series of its stock shall be uncertificated shares. Any such resolution shall not apply to shares represented by a certificate until such certificate is surrendered to the corporation. Notwithstanding the adoption of such a resolution by the Board of Directors, every holder of stock represented by certificates and upon request every holder of uncertificated shares shall be entitled to have a certificate, signed by or in the name of the corporation by the Chairman or Vice-Chairman of the Board of Directors, or the President or Vice-President, and by the Treasurer or an Assistant Treasurer, or the Secretary or an Assistant Secretary of the corporation, representing the number of shares registered in certificate form. Any and all signatures on any such certificate may be facsimiles. In case any officer, transfer agent or registrar who has signed or whose facsimile signature has been placed upon a certificate shall have ceased to be such officer, transfer agent or registrar before such certificate is issued, it may be issued by the corporation with the same effect as if he were such officer, transfer agent or registrar at the date of issue. The name of the holder of record of the shares represented thereby, with the number of such shares and the date of issue, shall be entered on the books of the corporation.

Section 5.2. Transfers of Stock. Upon compliance with provisions restricting the transfer or registration of transfer of shares of stock, if any, shares of capital stock shall be transferable on the books of the corporation only by the holder of record thereof in person, or by duly authorized attorney, upon surrender and cancellation of certificates for a like number of shares, properly endorsed, and the payment of all taxes due thereon.

Section 5.3. Lost, Stolen or Destroyed Certificates. The Corporation may issue a new certificate of stock in place of any certificate, theretofore issued by it, alleged to have been lost, stolen or destroyed, and the Board of Directors may require the owner of any lost, stolen or destroyed certificate, or his legal representative, to give the corporation a bond sufficient to indemnify the corporation against any claim that may be made against it on account of the alleged loss, theft or destruction of any such certificate or the issuance of any such new certificate.

Section 5.4. Record Date. In order that the corporation may determine the stockholders of record who are entitled to receive notice of, or to vote at, any meeting of stockholders or any adjournment thereof or to express consent to corporate action in writing without a meeting, or

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entitled to receive payment of any dividend or other distribution or allotment of any rights, or to exercise any rights in respect of any change, conversion, or exchange of stock of for the purpose of any lawful action, the Board of Directors may fix, in advance, a record date which shall not be more than sixty (60) nor less than ten (10) days prior to the date of such meeting, nor more than sixty (60) days prior to the date of any other action. A determination of stockholders of record entitled to notice or to vote at a meeting of stockholders shall apply to any adjournment of the meeting; provided, however, that the Board of Directors may fix a new record date for the adjourned meeting.

ARTICLE VI

Dividends

Section 6.1. Declaration. Dividends upon the capital stock of the corporation, subject to any restrictions contained in the Delaware General Corporation Law or the provisions of the certificate of incorporation, if any, may be declared by the Board of Directors at any regular or special meeting. Dividends may be paid in cash, in property or in shares of capital stock, subject to the provisions of the certificate of incorporation.

Section 6.2. Reserve. Before payment of any dividend, there may be set aside out of any funds of the corporation available for dividends such sum or sums as the Board of Directors from time to time, in its absolute discretion, thinks proper as a reserve or reserves to meet contingencies, or for equalizing dividends, or for repairing or maintaining any property of the corporation, or for such other purpose as the Board of Directors shall think conducive to the interest of the corporation, and the Board of Directors may modify or abolish any such reserve in the manner in which it was created.

ARTICLE VII

Indemnification

Section 7.1. Right to Indemnification. The corporation shall indemnify any director or officer of the corporation, and may indemnify any other person (“Covered Person”), who was or is a party or is threatened to be made a party to any threatened, pending, or completed action, suit, or proceeding, whether civil, criminal, administrative or investigative (other than an action by or in the right of the corporation) by reason of the fact that he is or was a director, officer, employee, or agent of the corporation, or is or was serving at the request of the corporation as a director, officer, employee, or agent of another corporation, partnership, joint venture, trust, or other enterprise, against expenses (including attorneys’ fees), judgments, fines, and amounts paid in settlement actually and reasonably incurred by him in connection with such action, suit, or proceeding if he acted in good faith and in a manner he reasonably believed to be in or not opposed to the best interests of the corporation, and, with respect to any criminal action or proceeding, had no reasonable cause to believe his conduct was unlawful. The termination of any action, suit, or proceeding by judgment, order, settlement, or conviction, or upon a plea of nolo

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contendere or its equivalent, shall not, of itself, create a presumption that the person did not act in good faith and in a manner which he reasonably believed to be in or not opposed to the best interests of the corporation, and, with respect to any criminal action or proceeding, had reasonable cause to believe that his conduct was unlawful.

Section 7.2. Prepayment of Expenses. The corporation shall to the fullest extent not prohibited by applicable law pay the expenses (including attorneys’ fees) incurred by a Covered Person in defending any proceeding in advance of its final disposition, provided, however, that, to the extent required by law, such payment of expenses in advance of the final disposition of the proceeding shall be made only upon receipt of an undertaking by the Covered Person to repay all amounts advanced if it should be ultimately determined that the Covered Person is not entitled to be indemnified under this Article VII or otherwise.

Section 7.3. Claims. If a claim for indemnification (following the final disposition of such action, suit or proceeding) or advancement of expenses under this Article VII is not paid in full within thirty (30) days after a written claim therefore by the Covered Person has been received by the corporation, the Covered Person may file suit to recover the unpaid amount of such claim and, if successful in whole or in part, shall be entitled to be paid the expense of prosecuting such claim to the fullest extent permitted by law. In any such action the corporation shall have the burden of proving that the Covered Person is not entitled to the requested indemnification or advancement of expenses under applicable law.

Section 7.4. Nonexclusivity of Rights. The rights conferred on any Covered Person by this Article VII shall not be exclusive of any other rights which such Covered Person may have or hereafter acquire under any statute, provision of the certificate of incorporation, these bylaws, agreement, vote of stockholders or disinterested directors or otherwise.

Section 7.5. Other Sources. The corporation’s obligation, if any, to indemnify or to advance expenses to any Covered Person who was or is serving at its request as a director, officer, employee or agent of another corporation, partnership, joint venture, trust, enterprise or nonprofit entity shall be reduced by any amount such Covered Person may collect as indemnification or advancement of expenses from such other corporation, partnership, joint venture, trust, enterprise or non-profit enterprise.

Section 7.6. Amendment or Repeal. Any repeal or modification of the foregoing provisions of this Article VII shall not adversely affect any right or protection hereunder of any Covered Person in respect of any act or omission occurring prior to the time of such repeal or modification.

Section 7.7. Insurance. Upon resolution passed by the Board of Directors the corporation may purchase and maintain insurance on behalf of any person who is or was an agent against any liability asserted against him and incurred by him in any such capacity, or arising out of his status as such, whether or not the corporation would have the power to indemnify him against such liability under the provisions of this Article VII.

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Section 7.8. Other Indemnification and Prepayment of Expenses. This Article VII shall not limit the right of the corporation, to the extent and in the manner permitted by law, to indemnify and to advance expenses to persons other than Covered Persons when and as authorized by appropriate corporate action.

ARTICLE VIII

Miscellaneous

Section 8.1. Fiscal Year. The fiscal year of the corporation shall be fixed, and shall be subject to change, by the Board of Directors. Unless otherwise fixed by the Board of Directors, the fiscal year of the corporation shall be the calendar year.

Section 8.2. Seal. The corporate seal shall have the name of the corporation inscribed thereon and shall be in such form as may be approved from time to time by the Board of Directors.

Section 8.3. Checks. All checks or demands for money and notes of the corporation shall be signed by such officer or officers or such other person or persons as the Board of Directors may from time to time designate.

Section 8.4. Books and Records. The books and records of the corporation may be kept at such place or places within or outside the State of Delaware as the Board of Directors or the respective officers in charge thereof may from time to time determine.

Section 8.5. Execution of Corporate Contracts and Instruments. The Board of Directors, except as otherwise provided in these bylaws, may authorize any officer or officers, or agent or agents, to enter into any contract or execute any instrument in the name of and on behalf of the corporation; such authority may be general or confined to specific instances. Unless so authorized or ratified by the Board of Directors or within the agency power of an officer, no officer, agent or employee shall have any power or authority to bind the corporation by any contract or engagement or to pledge its credit or to render it liable for any purpose or for any amount.

Section 8.6. Notice. Whenever, under the provisions of law or the certificate of incorporation or these bylaws, notice is required to be given to any director or stockholder it shall not be construed to mean personal notice, but such notice may be given in writing, by mail, addressed to such director or stockholder, at his or her address as it appears on the records of the corporation, with postage thereon prepaid, and such notice shall be deemed to be given at the time when the same shall be deposited in the United States mail. Notice to directors may also be given by telegram or telephone.

Section 8.7. Waiver. Whenever notice is required to be given by these bylaws or by the certificate of incorporation or by law, a written waiver thereof, signed by the person or persons entitled to said notice, whether before or after the time stated therein, shall be deemed equivalent to notice.

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ARTICLE IX

Amendments

The Board of Directors shall have power to adopt, amend or repeal these bylaws. Bylaws adopted by the Board of Directors may be repealed or changed, and new bylaws made, by the stockholders, and the stockholders may prescribe that any bylaw made by them shall not be altered, amended or repealed by the Board of Directors.

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