# Bisphenol S (BPS) Listed Under Proposition 65 for Reproductive Toxicity

California Proposition 65 (Safe Drinking Water and Toxic Enforcement Act of 1986)  
Office of Environmental Health Hazard Assessment (OEHHA)

**Announced**  
Jan 3, 2025

**Effective**  
Jan 3, 2025

**Implementation**  
Jan 3, 2025

## Description

OEHHA has added Bisphenol S (BPS) to the Proposition 65 list for reproductive toxicity (male and female endpoints). Products containing BPS that may cause significant exposures require Proposition 65 warnings when sold in California. BPS is commonly used as a BPA replacement in thermal paper, plastics, and other consumer products.

## Sources

- Official [Bisphenol S (BPS) Added to the Proposition 65 List for Reproductive Toxicity](https://oehha.ca.gov/proposition-65/crnr/bisphenol-s-bps-added-proposition-65-list-reproductive-toxicity)
- [Navigating California Proposition 65: Your Quick Guide](https://www.complianceandrisks.com/blog/navigating-california-proposition-65-your-quick-guide-to-the-latest-changes)

## Key Findings

Bisphenol S (BPS) Listed Under Proposition 65 for Reproductive Toxicity  
>BPS determination that the chemical was clearly shown to cause male reproductive harm. This expanded the original 2023 listing for female reproductive toxicity. Bisphenol S (BPS) Added for Developmental Toxicity Effective 8 December 2025 OEHHA has added the developmental toxicity endpoint to the existing reproductive toxicity listing for bisphenol S (BPS). This action was taken through the “State’s Qualified Experts.”