When cleaning products and detergents are processed using ethoxylation, a cheap technique that lessens the severity of the harsher ingredients, 1,4-dioxane is created. Since it is considered a byproduct of ethylene oxide reacting with other ingredients, 1,4-dioxane is technically considered a contaminant and thus does not have to be included on product labeling. As a result, consumers are largely unaware of its presence in major household products.
For the study, Steinman evaluated 20 different laundry detergents from both conventional and “natural” brands. Evoxa, an independent, third-party laboratory that is highly respected for its rigorous methods and high standards, conducted all product testing. The results are as follows: