AMVAC Regulatory Issues Statement Regarding Dacthal/DCPA

Newport Beach, CA

AMVAC Chemical acknowledges receipt of the U.S. Environmental Agency (EPA) notice of intent to suspend (NOITS) the pesticide dimethyl tetrachloroterephthalate (DCPA).

In response to the statement issued by the Office of Chemical Safety and Pollution Prevention, AMVAC would like to clarify that there has been significant dialogue between EPA and AMVAC regarding DCPA over the last 9 years. EPA has received preparatory study data on the key toxicological endpoint on thyroid toxicity and the definitive study will be completed and submitted in June 2022. EPA was fully aware of this proposed date for submission. This study will address the statements from the Agency around their key concerns on thyroid activity.

Additionally, AMVAC stands by the relevance and content of our submitted waivers during the DCI and can point to very recent concurrence from the agency on such waiver arguments.

AMVAC is currently working with a FIFRA attorney to determine the next steps with respect to negotiating or filing for a hearing as required by this notice and are committed to provide complete responses to the DCI. We want to assure all stakeholders that we have and continue to meet our obligations under the DCI on complex studies and that our commitment to keep this active ingredient registered has not changed. Please contact me at the email address if you would like any additional information on our regulatory position.

Anne Turnbough Ph.D.

Global VP Regulatory Affairs

About AMVAC Corporation

AMVAC Corporation is a subsidiary of American Vanguard Corporation. American Vanguard Corporation is a diversified specialty and agricultural products company that develops and markets products for crop protection management, turf and ornamentals management, and public safety and animal health applications. American Vanguard is included on the Russell 2000® & Russell 3000® Indexes and the Standard & Poors Small Cap 600 Index.

The Company, from time to time, may discuss forward-looking information. Except for the historical information contained in this release, all forward-looking statements are estimates by the Company’s management and are subject to various risks and uncertainties that may cause results to differ from management’s current expectations. Such factors include weather conditions, changes in regulatory policy and other risks as detailed from time-to-time in the Company’s SEC reports and filings. All forward-looking statements, if any, in this release represent the Company’s judgment as of the date of this release.

©2022 AMVAC Chemical Corporation is a wholly owned subsidiary of American Vanguard Corporation. All rights reserved. American Vanguard, AMVAC, Dacthal, and respective logos are trademarks owned by AMVAC Chemical Corporation.

Important: Always read and follow label instructions. See label for listed weeds and pests. Some products may not be registered for sale or use in all states or counties. Please check with your state agency responsible for pesticide registration to ensure registration status. All products are EPA registered.