* Carcinogen 1, 4-Dioxane/Ethylene Oxide Free * Tested in Independent Laboratory * Hypoallergenic * EcoLogo Certified * Co2 Neutral * Not Tested on Animals * Vegan Product * Septic Tank Safe EcoLogo-certified products must pass a series of test to prove their environmental leadership. Co2 neutral: We plant trees for your children. Industrial carcinogenic contaminants 1, 4-dioxane and ethylene oxide are regularly found in personal care products. This Attitude product does not contain these by-products listed as carcinogenic to humans by the International Agency of Research on Cancer (group 1 or 2).