1,4-dioxane, a carcinogen linked to organ toxicity, may be found in as many as 22 percent of the more than 25,000 cosmetics products in the Skin Deep database,[1] but you won’t find it on ingredient labels. That’s because 1,4-dioxane is a contaminant created when common ingredients react to form the compound when mixed together.
What is 1,4 Dioxane?
1,4-dioxane is generated through a process called ethoxylation, in which ethylene oxide, a known breast carcinogen, is added to other chemicals to make them less harsh. This process creates 1,4-dioxane. For example, sodium laurel sulfate, a chemical that is harsh on the skin, is often converted to the less-harsh chemical sodium laureth sulfate (the “eth” denotes ethoxylation). The conversion process can lead to contamination of this ingredient with 1,4-dioxane. Other common ingredients that may be contaminated by 1,4-dioxane include PEG compounds and chemicals that include the clauses “xynol,” “ceteareth” and “oleth.” Most commonly, 1,4-dioxane is found in products that create suds, like shampoo, liquid soap and bubble bath. Environmental Working Group’s analysis suggests that 97 percent of hair relaxers, 57 percent of baby soaps and 22 percent of all products in Skin Deep may be contaminated with 1,4-dioxane.[1] Independent lab tests co-released by the Campaign for Safe Cosmetics in 2007 showed that popular brands of children’s bubble bath and body wash contained 1,4-dioxane.
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