EPA advances risk evaluation for five chemicals under TSCA, including vinyl chloride, the organization said in a statement.
The U.S. Environmental Protection Agency announced that it will formally designate five known or probable carcinogens as High-Priority Substances (HPS) that will undergo a risk evaluation under the nation’s chemical safety law, the Toxic Substances Control Act (TSCA): acetaldehyde, acrylonitrile, benzenamine, 4,4’-methylene bis(2-chloroaniline) (MBOCA) and vinyl chloride. EPA also announced the beginning of the 9- to 12-month statutory process to prioritize the next five chemicals under TSCA to determine whether to initiate risk evaluations on them: benzene, ethylbenzene, naphthalene, styrene and 4-tert-octylphenol.
“Today we begin another five chemical risk evaluations under our nation’s strengthened chemical safety law and start the yearlong process to initiate five more,” said Assistant Administrator for the Office of Chemical Safety and Pollution Prevention Michal Freedhoff. “These risk evaluations will be used to determine how to protect people from harmful chemical exposures.”
EPA began the prioritization process for acetaldehyde, acrylonitrile, benzenamine, 4,4’-methylene bis(2-chloroaniline) (MBOCA) and vinyl chloride in the December 2023 announcement. Today’s final designation of each chemical for risk evaluation is the last step in the 9- to 12-monthlong statutory prioritization process.
Over the past year, EPA has continued to improve the prioritization process by investing in cutting-edge software to review more information earlier in prioritization. EPA has also implemented improvements to its systematic review approaches as recommended by the Scientific Advisory Committee on Chemicals (SACC) by incorporating additional data sources such as assessments published by other government agencies to identify potential hazards and exposures, clarifying terminology to increase transparency in the systematic review process, and presenting interactive literature inventory trees and evidence maps to better depict data sources containing potentially relevant information.
In a July 2024 announcement, EPA proposed to designate the five chemicals for risk evaluation. At that time, the agency made considerably more information about those chemicals publicly available a full year earlier in the process as compared to the first 30 chemicals to undergo risk evaluations under TSCA, giving the agency a head start on its work and giving the public earlier and better opportunities to provide input.
The agency will now begin risk evaluations for these chemical substances to determine whether they present an unreasonable risk of injury to health or the environment, without consideration of costs or other non-risk factors, under the conditions of use. If at the end of the risk evaluation process EPA determines that a chemical presents an unreasonable risk of injury to health or the environment, the agency must immediately start the risk management process to address the unreasonable risk.
mrchub.com