1,3,4,6,7,8-Hexahydro-4,6,6,7,8,8-Hexamethylcyclopenta [g]-2-Benzopyran (HHCB) and Phthalic Anhydride Draft Risk Evaluations Under the Toxic Substances Control Act (TSCA); Notice of Availability and Request for Comment
Published Date: 4/14/2026
Notice
Summary
The EPA is checking if two chemicals, HHCB and phthalic anhydride, might be harmful to people or the environment. They want your thoughts on their early findings by June 15, 2026. This affects companies using these chemicals and could lead to new safety rules that might impact costs or how these chemicals are used.
No Economic Impacts Identified for this Document
Personalized for You
How does this regulation affect your finances?
Personalize government policy and PRIA will tell you what this federal register document means for your household, plus every other regulation we track. PRIA reads each provision against your financial profile to show you exactly what matters to your wallet.
Key Dates
Department and Agencies
Related Federal Register Documents
2026-08750, Extension of Postponement of Effectiveness for Certain Provisions of Trichloroethylene (TCE); Regulation Under the Toxic Substances Control Act (TSCA)
The EPA is delaying some rules about the chemical TCE until court decisions are finished. This delay affects certain allowed uses of TCE that had special workplace rules. Businesses using TCE under these exemptions get more time before new restrictions kick in, helping them avoid sudden costs or changes.
2026-07061, Hazardous and Solid Waste Management System: Disposal of Coal Combustion Residuals From Electric Utilities; Legacy/CCRMU Amendments
The EPA is updating rules on how electric utilities handle coal waste to make cleanup safer and smarter. These changes affect power plants by easing some rules, adding new ways to monitor and close waste sites, and allowing more beneficial reuse of coal waste. Comments are open until June 12, 2026, so utilities and communities can weigh in before the new rules take effect.
2026-06808, Reconsideration of Standards of Performance for New, Reconstructed, and Modified Sources and Emissions Guidelines for Existing Sources: Oil and Natural Gas Sector Climate Review
The EPA is making some smart tweaks to rules for oil and natural gas companies about how they handle gas flaring and monitoring. These changes fix technical details without changing pollution limits and bring back some important reporting rules accidentally removed last year. The new rules kick in on June 8, 2026, so companies should get ready to follow the updated steps without extra costs.
2026-06275, Renewable Fuel Standard (RFS) Program: Standards for 2026 and 2027, Partial Waiver of 2025 Cellulosic Biofuel Volume Requirement, and Other Changes
The EPA just set new rules for renewable fuels in 2026 and 2027, including how much biofuel must be used. They’re also easing the 2025 cellulosic biofuel goals because production fell short and removing renewable electricity from the program. These changes affect fuel producers and sellers, kick in mostly mid-2026, and aim to keep cleaner fuels flowing without breaking the bank.
2026-05167, National Emission Standards for Hazardous Air Pollutants: Ethylene Oxide Emissions Standards for Sterilization Facilities Residual Risk and Technology Review Reconsideration
The EPA is updating rules for sterilization facilities that use ethylene oxide, a chemical that can be harmful if not controlled. They’re rolling back some strict standards from 2024, fixing technical errors, and changing how facilities prove they’re following the rules. If you run or work with these facilities, get ready for new deadlines and ways to stay in compliance by mid-2026.
2026-04646, Standards of Performance for New Stationary Sources and Emission Guidelines for Existing Sources: Large Municipal Waste Combustors Voluntary Remand Response and Five-Year Review
The EPA is updating pollution rules for big trash-burning plants to cut harmful emissions like lead, mercury, and dioxins. These changes affect both new and existing facilities, tighten limits, remove some loopholes, and improve reporting, all starting May 11, 2026. This update will clean up the air by reducing over 3,200 tons of pollution each year, helping communities breathe easier without breaking the bank.
Previous / Next Documents
Previous: 2026-07166, Environmental Management Site-Specific Advisory Board, Idaho Cleanup Project
The Environmental Management Site-Specific Advisory Board for the Idaho Cleanup Project is holding a public meeting on May 14, 2026, both in-person and online. This meeting lets the community learn about cleanup progress, share their thoughts, and help guide future environmental work. Anyone interested should sign up by May 11, 2026, to join or speak up, making sure their voice helps shape Idaho’s cleanup efforts.
Next: 2026-07172, 1,3,4,6,7,8-Hexahydro-4,6,6,7,8,8-Hexamethylcyclopenta [g]-2-Benzopyran (HHCB); Phthalic Anhydride; o-Dichlorobenzene (o-DCB) and p-Dichlorobenzene (p-DCB); Science Advisory Committee on Chemicals (SACC) Peer Review; Draft Risk Evaluations; Notice of SACC Meeting; Availability of Draft Documents and Request for Comment
The EPA is holding two virtual meetings in May and June 2026 to review safety reports on four chemicals used in everyday products. They want scientists and the public to check their work and share thoughts before final decisions. If you’re involved in manufacturing, health, or environmental safety, these meetings and comments could affect future rules and costs.