On July 10, 2026, Illinois enacted the Chemicals in Cosmetic Products Act, which prohibits the intentional use of 24 hazardous substances in cosmetic products sold in the state starting July 1, 2028. The law aligns Illinois cosmetic ingredient restrictions with European Union requirements and applies to a broad range of cosmetic products. Key prohibited substances include phthalates, formaldehyde and formaldehyde releasers, mercury, parabens, aromatic amines, and PFAS compounds. Scope and exemptions cover technically unavoidable trace contaminants arising from impurities, manufacturing, storage, or packaging migration where compliance processes are in place.