This week, California’s Office of Environmental Health Hazard Assessment (OEHHA) announced that five chemicals, including methyl chloride and vinyl acetate will be considered by the Proposition 65 Carcinogen Identification Committee (CIC) at its November 15, 2016 meeting. The chemicals or chemical groups are:
- Asphalt and Asphalt Emissions Associated with Road Paving and Asphalt and Asphalt Emissions Associated with Roofing
- Methyl Chloride
- Type I Pyrethroids
- Vinyl Acetate
Methyl chloride and vinyl acetate are both common intermediates in polymer production, while the latter is a High Production Volume chemical. Type I Pyrethroids are a group of synthetic insecticides also found in home and garden pest control products. Aspartame is a widely used artificial sweetener.
The CIC will advise OEHHA on prioritizing the chemicals for possible preparation of hazard identification materials, an intermediate step toward listing a chemical as carcinogenic under Prop. 65. No listing decisions will be made for these chemicals at the November meeting. However, the CIC will consider listing “nitrite in combination with amines or amides” at this meeting.
The five chemicals were chosen based on epidemiologic and animal data screens, followed by a preliminary toxicological evaluation. OEHHA prepared and has made available summaries of the relevant studies identified during the preliminary toxicological evaluation for each of the five chemicals.
The announcement marks the beginning of a public comment period which runs to October 24, 2016.