Exhibit 4.2

Certificate of Amendment

Of

Amended and Restated Certificate of Incorporation

Of

AdvanSix Inc.

Pursuant to Section 242 of the

General Corporation Law of the State of Delaware

_______________________

AdvanSix Inc. (the “Corporation”), a corporation duly organized and validly existing under and by virtue of the General Corporation Law of the State of Delaware, does hereby certify as follows:

FIRST: The Amended and Restated Certificate of Incorporation of the Corporation, which was filed with the Secretary of State of the State of Delaware on September 30, 2016 and became effective as of 11:59 p.m., New York City time, on October 1, 2016, as amended on June 11, 2019, is hereby further amended by deleting Article IX thereof in its entirety and inserting the following in lieu thereof:

ARTICLE IX

SECTION 1. To the fullest extent that the General Corporation Law of the State of Delaware or any other law of the State of Delaware as it exists or as it may hereafter be amended permits the limitation or elimination of the liability of directors or officers, no director or officer of the Corporation shall be liable to the Corporation or its stockholders for monetary damages for breach of fiduciary duty as a director or officer.

SECTION 2. To the fullest extent that the General Corporation Law of the State of Delaware or any other law of the State of Delaware as it exists or as it may hereafter be amended permits, the Corporation may provide indemnification of (and advancement of expenses to) its current and former directors, officers and agents (and any other persons to which the General Corporation Law of the State of Delaware permits the Corporation to provide indemnification) through By-law provisions, agreements with such agents or other persons, votes of stockholders or disinterested directors or otherwise.

SECTION 3. No amendment to or repeal of any Section of this Article IX, nor the adoption of any provision of this Amended and Restated Certificate of Incorporation inconsistent with this Article IX, shall eliminate or reduce the effect of this Article IX in respect of any matter occurring, or any action or proceeding accruing or arising, prior to such amendment, repeal or adoption of an inconsistent provision.

SECOND: The foregoing amendment was duly adopted in accordance with the provisions of Section 242 of the General Corporation Law of the State of Delaware.