TSCA Updates: Reporting Deadline Moved for 16 Chemicals

Update 04/01/26 

On March 30, 2026, EPA proposed to extend the deadline for chemical manufacturers to submit health and safety data about 16 specific chemical substances (listed below) covered by a December 2024 Final Rule for one year, until May 21, 2027. Industry stakeholders and the public can submit comments on the proposed rule until April 29. 

The 2024 Final Rule requires manufacturers (including importers) of 16 chemicals to submit “copies and lists of certain unpublished health and safety studies” to EPA. The list of substances for which reporting is required includes benzene, ethylbenzene, hydrogen fluoride, styrene, and vinyl chloride.

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EPA Final Rule: TSCA §8(d) Reporting on 16 Chemicals

With a Final Rule on June 9, EPA moved the deadline for chemical manufacturers to submit certain unpublished safety and health studies concerning 16 chemicals specified in a December 2024 rule. The list includes acetaldehyde, benzene, hydrogen fluoride, styrene, vinyl chloride, and other substances—all of which are designated by EPA as high priority substances for risk evaluations mandated by TSCA, as amended.  

For all 16 chemicals listed in the 2024 rule, the current deadline to report is May 22, 2026. EPA extended the submission deadline, in part, to allow more time for development of guidance to assist the regulated community with data submissions.

The chemicals covered by this reporting requirement are:

• 4,4-Methylene bis(2-chloraniline) 
• 4-tert-octylphenol(4-(1,1,3,3-Tetramethylbutyl)-phenol)
• Acetaldehyde
• Acrylonitrile 
• Benzenamine 
• Benzene 
• Bisphenol A
• Ethylbenzene 
• Hydrogen fluoride
• N-(1,3-Dimethylbutyl)-N’-phenyl-p-phenylenediamine (6PPD)
• 2-anilino-5-[(4-methylpentan-2-yl) amino]cyclohexa-2,5-diene-1,4-dione (6PPD-quinone)   
• Naphthalene
• Styrene
• Tribomomethane (Bromoform) 
• Triglycidyl isocyanurate 
• Vinyl Chloride 

More information about this reporting requirement under TSCA §8(d) can be found on EPA's website.

 

Draft Risk Evaluations for 2 Phthalates

On June 5, EPA announced that Draft Risk Evaluations are available for two phthalates—dibutyl phthalate (DBP) and diethylhexyl phthalate (DEHP). The agency’s preliminary finding is that both substances pose “unreasonable risk” to human health and the environment. Read the announcement in the Federal Register here. 

EPA will accept public comments on the draft risk evaluations until August 5, 2025. Under the Toxic Substances Control Act (TSCA), as amended, a finding of unreasonable risk must be followed by regulation to address the risk by restricting activity involving the chemical (manufacturing, distribution, etc.) or enacting workplace protections.

Note: The TSCA Activity Tracker has been updated.  

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The Toxic Substances Control Act (TSCA) is complex and enforcement is stringent, making a comprehensive understanding of the rules critical for compliance.  The law has broad applicability, subjecting all companies that “manufacture, use, process, distribute, import, or export chemical products” to complex reporting and management requirements.
 
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