Expiring TSCA CBI claims: How to request an extension
How do businesses keep confidential information “off the record”? Companies that are required to report on federally regulated chemical substances may soon face this question, as the first round of confidential business information (CBI) claims starts expiring in June 2026.
Thankfully, the Environmental Protection Agency (EPA) has answered how to keep CBI off the record. On January 6, 2026, the agency published in the Federal Register the process to request extensions of expiring CBI claims for information submitted under the Toxic Substances Control Act (TSCA).
Here’s what you need to know.
CBI extension request process
Businesses that seek to extend a CBI claim beyond its expiration date must submit an extension request. The Federal Register notice describes the following general process:
1. EPA notifies the entity of an expiring CBI claim.
The agency will publish a list of TSCA submissions with expiring CBI claims on the Confidential Business Information Under TSCA (TSCA CBI) website at least 60 days before the claims expire.
EPA will also notify submitters directly through its online Central Data Exchange (CDX). Verify that your company’s contact information on CDX is updated!
Submitters with CBI claims for specific chemical identities should reference the TSCA Chemical Substance Inventory (column EXP) to confirm expiration dates.
2. The entity submits an extension request.
The extension request for an expiring CBI claim includes:
- A certified supporting statement confirming the four assertions at 40 CFR 703.5(a), and
- Answers to EPA’s substantiation questions.
EPA lists the general questions that apply to all CBI claims at 703.5(b)(3). Additional questions at 703.5(b)(4) apply to entities claiming CBI for specific chemical identities.
Businesses must submit the extension through EPA’s CDX at least 30 days before the CBI claim expires. The agency is currently developing a new application on CDX for submitting extension requests, which it plans to launch before CBI claims begin expiring in June 2026.
If there’s a delay, EPA will notify submitters on the TSCA CBI website. Additionally, the agency won’t publicize any information from expiring CBI claims until businesses have the opportunity to submit extension requests and the agency reviews them.
3. EPA reviews the extension request.
If the agency approves the extension request, the information in the CBI claim will remain protected for up to another 10 years.
If the agency denies the extension request, the information in the CBI claim can be publicized once the claim expires. EPA will notify submitters of denied claims through CDX at least 30 days before it plans to disclose the information.
Expiring CBI claims: What are the options?
Regulated entities have three ways to address expiring CBI claims:
- If you choose to maintain the CBI claim, submit the extension request to EPA.
- If you decide not to renew the CBI claim, you can either:
- Withdraw the CBI claim through CDX, or
- Allow the CBI claim to expire (i.e., take no action).
Keep in mind that if you withdraw a CBI claim or allow it to expire, EPA can publicize this information without notifying you beforehand.
Who’s impacted?
The CBI extension request process applies to companies that have made CBI claims under TSCA on or after June 22, 2016.
The Frank R. Lautenberg Chemical Safety for the 21st Century Act (signed into law on June 22, 2016) made amendments to TSCA, including adding a 10-year expiration date to CBI claims.
Key to remember: EPA established the process for entities to request extensions of expiring CBI claims for information submitted under TSCA.























































