• According to the "Labor Code" listing method, the California Office of Environmental Health Hazard Assessment (OEHHA) declared its intention to add antimony (trivalent compounds) to Proposition 65's list of known carcinogens.

• The International Agency for Research on Cancer (IARC) has identified that trivalent compounds containing antimony are "probably carcinogenic to humans,"

• Proposition 65 (Safe Drinking Water and Toxic Enforcement Act 1986) prohibits the deliberate subject of a person to a substance on a list without first giving that person a "clear and fair warning".

• Earlier this year, OEHHA suggested a 0.13 microgram per day as ‘No Significant Risk Level (NSRL)’ for antimony trioxide under Proposition 65. The inclusion of antimony (trivalent compounds) under Proposition 65 would cover more antimony compounds than just the trioxide form.

• All written comments on the trivalent compounds of antimony listing must be submitted to OEHHA by October 31, 2022 and has encouraged paperless submission at OEHHA Website Submission

• The Labor Code listing method, according to the OEHHA, will not examine scientific arguments regarding the strength or caliber of the evidence considered by the IARC. The nature of Comments should therefore be limited to whether the IARC has classified trivalent compounds containing antimony as a human or animal carcinogen.

Reference: 1.https://oehha.ca.gov/proposition-65/crnr/notice-intent-list-chemical-labor-code-mechanism-antimony-trivalent-compounds

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