1, 4 Dioxane/Ethylene Oxide Contaminant Free Tested in Independent Laboratory 35 Loads Hypoallergenic Vegan Product Septic Tank Safe EcoFriendly Ecologo 1,4-dioxane and ethylene oxide may be found as legally tolerated contaminants in household products. This Attitude product does not contain these by-products listed to carcinogenic to humans by the International Agency for Research on Cancer (group 1 or 2). EcoLogo: We do everything we can to offer you the greenest products in the world. The EcoLogo certification is proof of our environmental leadership. C02 neutral: Attitude is manufactured using 100% renewable energy and we plant trees to compensate our inevitable greenhouse gas emissions.