The Department of Health & Human Services (HHS) and parties intervening on its behalf in a case where industry challenges styrene's listing in the 12th Report on Carcinogens (RoC) are asking a federal judge to grant a summary judgment upholding the listing while denying industry's own recent request for a summary judgment overturning it. Industry has argued that the styrene listing was arbitrary and capricious, made as a preordained conclusion that ignored negative evidence, and was based on some inaccurate information from staff in HHS' National Toxicology Program (NTP), which drafts the
December 29, 2025