EPA publishes final revised risk determination for 1,4-dioxane
Washington — The Environmental Protection Agency says the potentially carcinogenic chemical substance 1,4-dioxane poses “unreasonable risk” to workers under certain conditions.
A final revised risk determination published on July 26 states that 1,4-dioxane – frequently used in consumer products – poses unreasonable risks to workers in:
- Domestic manufacturing
- Uses as a processing aid or laboratory chemical
- Uses as an adhesive and sealant
- Printing and printing compositions
- Hydraulic fracturing
EPA reopened and updated the risk evaluation for 1,4-dioxane after publishing a final risk evaluation in January 2021.
A draft supplemental risk evaluation released in July notes that the agency uncovered more risks than initially determined. EPA says the chemical substance poses an estimated cancer risk “higher than 1 in 10,000 for a range of occupational exposure scenarios associated with 1,4-dioxane produced as a byproduct.”
Comments are due Sept. 8.