* Sustainable Wellbeing * Carcinogen 1,4 Dioxane-Ethylene Oxide Free * Tested by Independent Laboratory * Certified EcoLogo * CO2 Neutral 1,4-dioxane and ethylene oxide may be found as legally tolerated contaminants in personal care products. This Attitude product does not contains these by-products listed as carcinogenic to humans by the International Agency for Research on Cancer (group 1 or 2).