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U.S. EPA to Withdraw Interim Registration Review Decision for Glyphosate

US regulators on Friday said they would withdraw all remaining portions of the interim registration review decision for the weed killer glyphosate.

The move comes after the 9th U.S. Circuit Court of Appeals issued an opinion saying the Environmental Protection Agency (EPA) had violated the law in its assessment of glyphosate, which is the world’s most widely used weed killer and the active ingredient in Roundup and numerous other herbicide products.

The court found that EPA had ignored important studies in its human health safety assessment of the chemical and had also violated the Endangered Species Act. The EPA’s withdrawal comes before an October 1 deadline under which the agency was supposed to have completed its assessment. EPA had asked the court to extend its deadline but the court denied the request.

In its June 17 opinion, the 9th circuit said the agency’s 2020 assessment of glyphosate, the active ingredient in the herbicide Roundup, was flawed in many ways. The federal appeals court ruled that EPA failed to follow established guidelines for determining cancer risk, ignored important studies, and discounted expert advice from a scientific advisory panel. The EPA applied “inconsistent reasoning” in finding that the chemical does not pose “any reasonable risk to man or the environment,” the panel determined.