Always use the official EPA.gov links to ensure you are getting the most accurate and secure data. Official Download Links
Provides access to the non-confidential identities of substances submitted under TSCA. Download TSCA rar
The download provides non-confidential identities of chemical substances, their CAS numbers , and their "active" or "inactive" status in U.S. commerce. Always use the official EPA
The latest version (e.g., July 2025 or February 2026) contains over 86,000 chemicals . their CAS numbers
To ensure you are downloading legitimate data files and not potentially harmful archives, use these verified government sources:
Looking for the latest data? Whether you're conducting a compliance check or environmental research, the U.S. Environmental Protection Agency (EPA) regularly updates the non-confidential list of chemicals manufactured or imported in the U.S..