Carcinogen 1,4-Dioxane Ethylene Oxide Free* Hypoallergenic Industrial carcinogenic contaminants 1,4-dioxane and ethylene oxide are regularly found in household products. This Attitude product does not contain these by-products listed as carcinogenic to humans by the State of California Proposition 65. EcoLogo certified products must pass a series of tests to prove their environmental leadership. CO2 Neutral: We plant trees for your children. Vegan product. Septic tank safe.