EPA Releases Draft TSCA Risk Evaluations For Phthalates BBP And DIBP For Public Comment

The U.S. Environmental Protection Agency (EPA) announced on August 6, 2025, the availability of the draft Toxic Substances Control Act (TSCA) risk evaluations for the phthalates butyl benzyl phthalate (BBP) and diisobutyl phthalate (DIBP) for public comment. 90 Fed. Reg. 37855. According to EPA, the purpose of TSCA risk evaluations is to determine whether a chemical substance presents an unreasonable risk of injury to health or the environment under the conditions of use (COU), including unreasonable risk to potentially exposed or susceptible subpopulations identified as relevant to the risk evaluation by EPA, and without consideration of costs or non-risk factors. EPA states that it used the best available science to prepare the draft risk evaluations and to determine preliminarily, based on the weight of scientific evidence, that BBP and DIBP pose unreasonable risk to health and the environment driven primarily by certain COUs analyzed in the draft risk evaluations.