California Proposition 65 is a ballot initiative that was passed by Californian citizens in 1986 in order to address their concerns regarding exposure to toxic chemicals. The act has become a product safety directive meaning that any retailer of a product or service in California is legally responsible for the chemical content of that product or service. There are currently over 900 chemicals in the Proposition 65 List. The chemicals listed are known to cause cancer or birth defects or other reproductive harm. If a product has not met the Prop 65 standards I would not recommend using it.