AMENDMENTNO. 1 TO THE HUDSONTECHNOLOGIEs, Inc. 2004 Stock Incentive Plan

Exhibit 10.39:

AMENDMENT NO. 1 TO THE

HUDSON TECHNOLOGIEs, Inc. 2004 Stock Incentive Plan

THIS AMENDMENT NO. 1 TO THE HUDSON TECHNOLOGIES, Inc. 2004 Stock Incentive Plan has been adopted by the Board of Directors (the “Board”) of Hudson Technologies, Inc., a New York corporation (the “Company”), on October 22, 2013, to be effective as of such date.

WHEREAS, the Company’s 2004 Stock Incentive Plan (the “Plan”) was adopted by the Board in 2004;

WHEREAS, pursuant to Section 10 of the Plan, the Board has approved the amendment set forth below.

NOW, THEREFORE, the Plan is hereby amended, effective as of the date hereof, as follows:

“The Committee, in its discretion, may delegate to one or more officers of the Company all or part of the Committee’s authority and duties with respect to grants and awards (i) to individuals who are not subject to the reporting and other provisions of Section 16 of the Securities Exchange Act of 1934, as amended, and (ii) that are not intended to qualify as “performance-based compensation” for purposes of Code Section 162(m). The Committee may revoke or amend the terms of a delegation at any time but such action shall not invalidate any prior actions of the Committee’s delegate or delegates that were consistent with the terms of the Plan.”