California EPA’s Office of Environmental Health Hazard Assessment (OEHHA) has extended the comment period for several chemicals, including benzophenone, a chemical used in plastic packaging as a UV blocker, that the agency is considering adding to the list of chemicals known to the state to cause cancer (Prop. 65) under the Labor Code mechanism. Public comments are now requested by March 22, 2012. According to OEHHA, “[b]ecause these are ministerial listings, comments should be limited to whether the International Agency for Research on Cancer has identified the specific chemical or substance as a known or potential human or animal carcinogen.”