This post covers the California Prop 65 label requirements for Amazon Listings. The California Prop 65 Label Act requires businesses and manufacturers to provide warnings about potential chemical exposures from their products. A Prop 65 warning label does not necessarily mean a product is unsafe but simply informs consumers about potential chemical exposure before they purchase the product. There is a wide range of potential chemicals that the law covers and businesses need to understand their responsibility for properly labeling their products.