California – Four Substances Added to Proposition 65

The California Office of Environmental Health Hazard Assessment (OEHHA) added four substances to the Proposition 65 list of substances known to the State of California to cause cancer. The Proposition 65 notice of the four new substances is posted on the OEHHA website[1].

The substances are:

  • tetrahydrofuran (CAS No. 109-99-9),
  • 2-ethylhexyl acrylate (CAS No. 103-11-7),
  • methyl acrylate (CAS No. 96-33-3), and
  • trimethylolpropane triacrylate, technical grade.

The listing came into effect on December 17, 2021. Proposition 65 provides for a one-year transition period, therefore products that are an exposure risk for any of these substances will have until December 17, 2022 to meet the warning label requirements.

[1] OEHHA prop 65 notice,