11 May 2023
The U.S. Environmental Protection Agency (EPA) is seeking nominations of expert reviewers to assist the Science Advisory Committee on Chemicals (SACC) with their review of the 2023 Draft Supplement to the 1,4-Dioxane Risk Assessment under the Toxic Substances Review Act (TSCA).
SACC provides the US EPA with independent scientific guidance and direction regarding the methodologies, risk assessments, and pollution prevention measures and approaches for chemicals classified under TSCA.
The Risk Analysis of 1,4-Dioxane is mainly to protect Human Health & Environment. EPA has reviewed 24 conditions for risk analysis which includes laboratory chemicals, adhesives, sealants, solvents, spray polyurethane foam, printing ink, and dry film lubricants. 1,4-dioxane is found in consumer products such as detergents and soaps.
This review assesses the effects of 1,4-dioxane exposure on the environment, including surface water, groundwater, ambient air, and land. It also evaluates additional conditions of use where 1,4-dioxane is present as a by-product in industrial processes.
The applications of 1,4-Dioxane in manufacturing and household products are:
EPA intends to make the 2023 Draft Supplement to the 1,4-Dioxane Risk Evaluation for public comment in June of 2023. This document will be reviewed with the public virtually by SACC in September 2023. SACC will announce registration instructions for the meeting in the summer of 2023.
The EPA considers April 24, 2023 to be the last day for any other nominations. This nomination will be considered by 10 to 15 ad hoc reviewers who will help the SACC with its review.
Which are all the substance or products that contains 1,4-Dioxane?
Effects of 1,4-dioxane to human health and environment is depends on frequency of the exposure and how much percentage of 1,4-dioxane is present.
It is important to regulate and monitor 1,4-dioxane carefully to minimize its risks and impacts on humans as well as the environment. Once the thorough risk evaluation process mandated by TSCA is completed, EPA will make a final determination on whether a chemical substance will pose any unreasonably high risks to human health or the environment upon usage. This process will allow EPA to develop and implement necessary risk management procedures to ensure the safety of chemicals that will be sold on the market.
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1. What does the risk assessment for 1 4 dioxane entail?
Based on a thorough analysis of the scientific evidence, the agency’s final conclusions on which conditions of use pose unreasonably high hazards to human health or the environment are included in the 1,4-dioxane risk evaluation.
2.Why is dioxane harmful?
In addition to damaging the liver and kidneys, acute exposure to large concentrations of 1,4-dioxane vapors also causes irritation of the eyes, nose, and throat.