Prop 65

regulation

California's Proposition 65 requires businesses to provide warnings about significant exposures to chemicals known to cause cancer, birth defects, or reproductive harm in products sold in California.

In Simple Terms

Prop 65 is a California law that requires warning labels on products containing certain chemicals. For plastic resin traders and processors, this means understanding which additives, colorants, or processing aids in your materials might trigger labeling requirements for end products sold in California.

Why It Matters

Compliance affects market access and liability. Resin suppliers must provide accurate chemical disclosure information, and processors need to assess if their finished products require Prop 65 warnings. Non-compliance can result in lawsuits and penalties, making it crucial for supply chain transparency.

Technical Details

The regulation covers over 900 listed chemicals including lead compounds in some colorants, certain flame retardants, plasticizers like DEHP, and processing byproducts. Safe harbor levels exist for some chemicals, but many have no threshold. Material safety data sheets and certificates of analysis must accurately reflect Prop 65-relevant substances to enable downstream compliance decisions.

Real-World Examples

PVC Resin with Stabilizers

PVC compounds containing lead-based stabilizers require Prop 65 warnings when the finished products are sold in California, affecting resin specification and pricing negotiations.

Flame Retardant Additives

Engineering plastics with certain brominated flame retardants may trigger Prop 65 requirements, requiring clear documentation in certificates of analysis for customer compliance assessments.

Recycled Content Materials

Post-consumer recycled resins may contain trace amounts of listed chemicals from previous applications, necessitating thorough testing and documentation for California market access.