The California Environmental Production Agency's Office of Environmental Health Hazard Assessment (OEHHA) has announced to add bisphenol S (BPS) to Prop 65 list, as a result of its reproductive toxicity (female reproductive endpoint).
Bisphenol S, or BPS, with the IUPAC name 4-4hydroxyphenyl sulfonylphenol, is always used as a substitute for bisphenol A (BPA). BPS is commonly used to produce plastics and synthetic fibers in the manufacturing of hard plastic items and clothing textiles. It is also utilized as a color developer for thermal paper and as protective coatings for some food cans. BPS could even be detected in personal care products, food, baby bottles, etc.
Although BPS was regarded as a safe substitute for BPA, recent research showed that BPS has a wide range of toxic effects on neuroendocrine function in animals. Studies found that BPS might be just as damaging to the reproductive system as BPA, and even a relatively low level of BPS can cause damage to female eggs.
The list was effective on December 29, 2023. The warning requirement for significant exposures to BPS will take effect on December 29, 2024.
About Prop 65
California Proposition 65 (also known as Safe Drinking Water and Toxic Enforcement Act) was enacted as a ballot initiative in November 1986. Prop 65 businesses are required to provide a "clear and reasonable" warning before knowingly and intentionally exposing anyone to a listed chemical “Known to the State” to cause cancer or reproductive harm.
Prop 65 requires that the Governor revise and republish at least once per year the list of chemicals known to the State to cause cancer or reproductive toxicity. Up to now, there are nearly 1,000 chemical listings. Businesses using the listed chemicals shall provide a warning unless they can demonstrate the inhalation concentration of the listed chemical is lower than the safe harbor level during normal use of consumers by virtue of scientific data.
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