The Office of Environmental Health Hazard Assessment (OEHHA) is releasing a document for public review that summarizes the carcinogenicity and derivation of a cancer inhalation unit risk factor (IUR) for p‑Chloro-α,α,α-trifluorotoluene

(p-chlorobenzotrifluoride, PCBTF).

At a public meeting on December 11, 2019, the Developmental and Reproductive Toxicant Identification Committee in its official capacity as the “state’s qualified experts” determined that cannabis (marijuana) smoke and Δ9-tetrahydrocannabinol (Δ9-THC) were shown to cause reproductive toxicity based on the developmental endpoint. 

The Office of Environmental Health Hazard Assessment is providing notice of changes to the proposed regulatory action to amend Section 25600.2 of Title 27 of the California Code of Regulations.  Section 25600.2 addresses the responsibility to provide consumer product exposure warnings for chemicals listed under Proposition 65.

On October 5, 2018, the Office of Environmental Health Hazard Assessment (OEHHA) issued a notice of proposed rulemaking to adopt amendments to Title 27, California Code of Regulations, section 25821.  The amendments were intended to clarify when and how a person could average concentrations of a listed chemical in a food, and identified the use of the arithmetic mean as the default method of calculation of individual exposure. 

The chemicals are being added to the list of chemicals known to the State of California to cause cancer for purposes of Proposition 65. The listing of these chemicals is pursuant to the “Labor Code” listing mechanism.

IURs are used to estimate lifetime cancer risks associated with inhalation exposure to a carcinogen.

RELs are airborne concentrations of a chemical that are not anticipated to result in adverse noncancer health effects for specified exposure durations in the general population, including sensitive subpopulations.