Exhibit 3.1

STATE OF DELAWARE

SECOND AMENDED AND RESTATED CERTIFICATE OF INCORPORATION

TRECORA RESOURCES

ARTICLE I

The name of the corporation is Trecora Resources (hereinafter, the “Corporation”).

ARTICLE II

The registered office of the Corporation in the State of Delaware is 251 Little Falls Drive, Wilmington, New Castle County, Delaware 19808. The name of its registered agent at such address is Corporation Service Company.

ARTICLE III

The purpose of the Corporation shall be to engage in any lawful act or activity for which corporations may be organized under the General Corporation Law of the State of Delaware.

ARTICLE IV

The aggregate number of shares of capital stock which the Corporation is authorized to issue is 1,000 shares of Common Stock, with a par value of $0.001 per share.

ARTICLE V

Unless and except to the extent that the bylaws of the Corporation (the “Bylaws”) shall so require, the election of directors of the Corporation need not be by written ballot.

ARTICLE VI

In furtherance of, and not in limitation of, the powers conferred by statute, the Board of Directors of the Corporation is expressly authorized to adopt, amend or repeal the Bylaws or adopt new Bylaws without any action on the part of the stockholders; provided that any Bylaw adopted or amended by the Board of Directors of the Corporation, and any powers thereby conferred, may be amended, altered or repealed by the stockholders.

ARTICLE VII

To the fullest extent permitted by law, a director of the Corporation shall not be personally liable to the Corporation or to its stockholders for monetary damages for any breach of fiduciary duty as a director. No amendment to, modification of or repeal of this Article VII shall apply to or have any effect on the liability or alleged liability of any director of the Corporation for or with respect to any acts or omissions of such director occurring prior to such amendment.

ARTICLE VIII

The Corporation shall indemnify, advance expenses, and hold harmless, to the fullest extent permitted by applicable law as it presently exists or may hereafter be amended, any person (a “Covered Person”) who was or is made or is threatened to be made a party or is otherwise involved in any action, suit or proceeding, whether civil, criminal, administrative or investigative (a “Proceeding”), by reason of the fact that he or she, or a person for whom he or she is the legal representative, is or was a director or officer of the Corporation or, while a director or officer of the Corporation, is or was serving at the request of the Corporation as a director, officer, employee or agent of another corporation or of a partnership, joint venture, trust, enterprise or nonprofit entity, including service with respect to employee benefit plans, against all liability and loss suffered and expenses (including attorneys’ fees) reasonably incurred by such Covered Person. Notwithstanding the preceding sentence, except for claims for indemnification (following the final disposition of such Proceeding) or advancement of expenses not paid in full, the Corporation shall be required to indemnify a Covered Person in connection with a Proceeding (or part thereof) commenced by such Covered Person only if the commencement of such Proceeding (or part thereof) by the Covered Person was authorized in the specific case by the board of directors of the Corporation. Any amendment, repeal or modification of this Article VIII shall not adversely affect any right or protection hereunder of any person in respect of any act or omission occurring prior to the time of such repeal or modification.

ARTICLE IX

The Corporation shall have the right, subject to any express provisions or restrictions contained in this Second Amended and Restated Certificate of Incorporation of the Corporation (the “Certificate of Incorporation”) or the Bylaws, from time to time, to amend, alter, change or repeal the Certificate of Incorporation or any provision thereof in any manner now or hereafter provided by law, and all rights, preferences, privileges and powers of any kind conferred upon a director or stockholder of the Corporation by the Certificate of Incorporation or any amendment thereof are conferred subject to such right.

TRECORA RESOURCES 8-K