New Federal Court Decision Holds Proposition 65 Warnings Are Not Required Where There Was No Scientific Consensus on the Carcinogenicity of the Chemical in the Product

In an important decision under California’s Proposition 65, a federal court recently ruled that businesses cannot be required to provide a product warning under Proposition 65 where there is no scientific consensus on whether the chemical found in the product is a carcinogen. On May 2, 2025, the Court granted summary judgment for plaintiffs in California Chamber of Commerce v. Bonta, No. 19-CV-02019 (E.D. Cal.) (“Cal Chamber”), holding that the First Amendment bars the State of California from…
By: King & Spalding