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On June 16, 2025, the U.S. Environmental Protection Agency (EPA) filed a motion with the U.S. Court of Appeals for the Fifth Circuit requesting that litigation over its 2024 final rule regulating chrysotile asbestos under the Toxic Substances Control Act (TSCA) be held in abeyance for an additional six months. According to the filing, EPA intends to initiate a new notice-and-comment rulemaking to reconsider certain provisions of the rule. The litigation, Texas Chemistry Council, et al. v. EPA,...

On June 16, 2025, the U.S. Environmental Protection Agency (EPA) announced the release of the draft charge questions for discussion at the upcoming Science Advisory Committee on Chemicals (SACC) meeting to review all documents released thus far on the risk evaluations of five phthalates. SACC will review the draft risk evaluations for dibutyl phthalate (DBP), di(2-ethylhexyl) phthalate (DEHP), and dicyclohexyl phthalate (DCHP), as well as cross-cutting documents related to DBP, DEHP, DCHP, butyl...

Download now. This week, I discuss with Patricia Underwood, Ph.D., DABT, MBA, Chief Toxicologist, Principal Director – Chemical and Material Risk Management, Office of the Assistant Secretary of Defense, Department of Defense, and my colleague, Richard E. Engler, Ph.D., Director of Chemistry for B&C and The Acta Group (Acta®), our consulting affiliate, the U.S. Department of Defense’s (DOD) recent Request for Information (RFI) on chemicals undergoing U.S. Environmental Protection...

On May 27, 2025, the U.S. Department of Defense (DOD) issued a request for information (RFI) to gather information to identify and assess critical applications for DOD and the defense industrial base (DIB) that necessitate the use of existing chemicals undergoing the U.S. Environmental Protection Agency’s (EPA) Toxic Substances Control Act (TSCA) Section 6 risk evaluation process. The RFI states that it will help the Office of the Assistant Secretary of Defense for Energy, Installations, and...

On May 15, 2025, the Center for Environmental Accountability (CEA) filed a petition under Section 21 of the Toxic Substances Control Act (TSCA) requesting that the U.S. Environmental Protection Agency (EPA) reconsider the 2024 final rule regarding procedures for chemical risk evaluation under TSCA and initiate a rulemaking to amend certain provisions in 40 C.F.R. Part 702, subpart B. According to CEA, the current process “has led to overly conservative risk conclusions and, in turn,...

The U.S. Environmental Protection Agency (EPA) announced on April 30, 2025, that it is requesting public comments on candidates who are interested and available to serve as ad hoc reviewers assisting its Science Advisory Committee on Chemicals (SACC) in the peer review of the Agency’s data, methods, models, and approaches for the draft Toxic Substances Control Act (TSCA) risk evaluations of dibutyl phthalate (DBP), di(2-ethylhexyl) phthalate (DEHP), and dicyclohexyl phthalate (DCHP). According...

On May 2, 2025, U.S. Environmental Protection Agency (EPA) Administrator Lee Zeldin announced the “[n]ext phase of organizational improvements to better integrate science into agency offices.” As part of this reorganization effort, Administrator Zeldin introduced the creation of the Office of Applied Science and Environmental Solutions (OASES) within the Office of the Administrator. According to Zeldin, OASES will “align research and put science at the forefront of the agency’s...

As reported in our March 31, 2025, blog item, on March 21, 2025, the U.S. Court of Appeals for the District of Columbia Circuit heard oral argument in a case challenging the U.S. Environmental Protection Agency’s (EPA) May 3, 2024, final rule amending the procedural framework rule for conducting risk evaluations under the Toxic Substances Control Act (TSCA). United Steel, Paper and Forestry, Rubber, Manufacturing, Energy, Allied Industrial and Service Workers International Union (USW) v. EPA,...

On March 21, 2025, the U.S. Court of Appeals for the District of Columbia Circuit heard oral argument in a case challenging the U.S. Environmental Protection Agency’s (EPA) May 3, 2024, final rule amending the procedural framework rule for conducting risk evaluations under the Toxic Substances Control Act (TSCA). United Steel, Paper and Forestry, Rubber, Manufacturing, Energy, Allied Industrial and Service Workers International Union (USW) v. EPA, Consolidated Case No. 24-1151. If you have a...

On March 10, 2025, the U.S. Environmental Protection Agency (EPA) announced its intent to reconsider the May 3, 2024, rule amending the procedural framework rule for conducting risk evaluations under the Toxic Substances Control Act (TSCA) (2024 Risk Evaluation Framework Rule). According to EPA, it will initiate a rulemaking “that will ensure the agency can efficiently and effectively protect human health and the environment and follow the law.” As reported in our February 7, 2025, blog...

The U.S. Environmental Protection Agency (EPA) announced on March 11, 2025, the rescheduled meeting dates of the Science Advisory Committee on Chemicals (SACC) that had been previously scheduled for February 2025 to consider and review the draft risk evaluation for 1,3-butadiene. 90 Fed. Reg. 11737. The rescheduled preparatory meeting for the SACC to consider the scope and clarity of the revised draft charge questions for the peer review will now be held on March 25, 2025, and the rescheduled...

The U.S. Environmental Protection Agency (EPA) announced on March 7, 2025, that it is extending the comment period on the draft risk evaluation for dicyclohexyl phthalate (DCHP) under the Toxic Substances Control Act (TSCA). EPA released the risk evaluation for DCHP on January 7, 2025, with a comment period that closed March 10, 2025. EPA states that it will soon publish a Federal Register notice extending the public comment period for an additional 60 days. Upon publication of the Federal...

On March 5, 2025, the U.S. Environmental Protection Agency (EPA) extended the comment period on the draft scope of the risk evaluation to be conducted under the Toxic Substances Control Act (TSCA) for vinyl chloride. 90 Fed. Reg. 11315. As reported in our January 28, 2025, memorandum, under TSCA, the scope documents must include the conditions of use (COU), hazards, exposures, and the potentially exposed or susceptible subpopulations (PESS) that EPA expects to consider in conducting its risk...

The U.S. Environmental Protection Agency (EPA) announced on January 31, 2025, that it is extending the public comment period on the draft risk evaluation for 1,3-butadiene under the Toxic Substances Control Act (TSCA). 90 Fed. Reg. 8798. Comments that were due February 3, 2025, are now due March 5, 2025. EPA states in its announcement that to give the peer reviewers on the Science Advisory Committee on Chemicals (SACC) time to review any additional comments received, it is in the process of...

On January 16, 2025, the U.S. Environmental Protection Agency (EPA) announced the availability of and requested public comment on the draft scope of the risk evaluation to be conducted under the Toxic Substances Control Act (TSCA) for vinyl chloride. 90 Fed. Reg. 4738. EPA notes that under TSCA, the scope documents must include the conditions of use (COU), hazards, exposures, and the potentially exposed or susceptible subpopulations (PESS) that EPA expects to consider in conducting its risk...

The U.S. Environmental Protection Agency (EPA) announced on September 3, 2024, the release of the draft risk evaluation for diisononyl phthalate (DINP) under the Toxic Substances Control Act (TSCA) for public comment. 89 Fed. Reg. 71270. EPA states in its August 30, 2024, press release that it preliminarily determined that two industrial uses and one consumer use “significantly contribute to the unreasonable risk of DINP out of the 45 uses evaluated.” EPA preliminarily determined that DINP...

The U.S. Environmental Protection Agency (EPA) announced on July 25, 2024, that it is proposing to designate acetaldehyde, acrylonitrile, benzenamine, vinyl chloride, and 4,4-methylene bis(2-chloroaniline) (MBOCA) as high-priority substances (HPS) for risk evaluation under the Toxic Substances Control Act (TSCA). 89 Fed. Reg. 60420. EPA is providing a 90-day comment period, during which interested persons may submit comments on the proposed designations of these chemicals as HPSs for risk...

The U.S. Environmental Protection Agency (EPA) announced on May 20, 2024, the availability of and solicited public comment on the draft manufacturer-requested risk evaluation (MRRE) for di-isodecyl phthalate (DIDP) and the draft physical chemical, fate, and hazard assessments for di-isononyl phthalate (DINP) prepared under the Toxic Substances Control Act (TSCA). 89 Fed. Reg. 43847. In its May 17, 2024, press release, EPA states that it preliminarily determined that all but one of the uses of...

The U.S. Environmental Protection Agency (EPA) released a final rule on April 23, 2024, that amends the procedural framework rule for conducting risk evaluations under the Toxic Substances Control Act (TSCA). According to the final rule, published in the Federal Register on May 3, 2024, EPA reconsidered the procedural framework rule for conducting such risk evaluations and is revising certain aspects of that framework to align better with the statutory text and applicable court decisions, to...

On May 3, 2024, comments by Lynn L. Bergeson were featured in Chemical Watch’s article on possible legal challenges to updated TSCA risk evaluation procedures. "The rule is so foundational", said Lynn Bergeson, managing partner at Bergeson & Campbell. If there is a lawsuit, both NGOs and industry "can be expected to claim that the other’s view is unsupported".  In its 2019 decision, the Ninth Circuit declined to weigh in on many issues, stating that it was premature to...