In June 28, 2019, the California Office of environmental health assessment (OEHHA) added PCBTF (chloro three fluoro toluene) to the list of hazardous substances in the 65 proposal of California, adding the reason is its carcinogenicity.

There are more than 970 substances in the list of 65 hazardous substances in California now, which are updated at least once a year. In 2018, 4 substances were added, and 2 substances have been added since 2019.