Materials · Hazloc Labs

California Proposition 65 for Hardware and Electronics Brands

California’s Proposition 65 (Safe Drinking Water and Toxic Enforcement Act) requires clear warnings before knowingly and intentionally exposing individuals to listed chemicals above safe-harbor levels. Electronics brands meet Prop 65 through materials (lead, phthalates, flame retardants, nickel, etc.), packaging, and sometimes workplace exposures — not through a CE-style DoC.

Why hardware teams get surprised

• A product can be RoHS-compliant and still need a Prop 65 analysis
• Private plaintiffs drive much of the enforcement activity
• Online sellers shipping into California are in scope of warning expectations
• “Just add a warning” without exposure analysis can be the wrong strategy — and over-warning has its own issues

Practical program elements

Element	Purpose
BOM screening	Flag parts likely to contain listed chemicals
Supplier declarations / testing	Evidence for plastics, coatings, solders, cables
Exposure assessment	Decide if a warning is required vs reformulation
Warning content & placement	Meet safe-harbor warning formats where used
Change control	Revisit when resins, platings, or packaging change

Relation to EU materials rules

RoHS, REACH, and Prop 65 overlap chemically but differ in legal triggers (restriction vs authorization vs warning). Build a single substance data pipeline that can answer all three, rather than three disconnected email chains.

FAQ

Does a Prop 65 warning mean the product is illegal in California?

No. A proper warning is a compliance tool when exposures require it. The goal is lawful commerce with accurate communication — ideally with exposure below warning thresholds when feasible.

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