Guide to Accessing and Downloading the TSCA Chemical Substance Inventory

The download provides non-confidential identities of chemical substances, their CAS numbers , and their "active" or "inactive" status in U.S. commerce.

To ensure you are downloading legitimate data files and not potentially harmful archives, use these verified government sources:

Files are typically available in CSV or Microsoft Access formats, which you may need to decompress (using tools like WinRAR or 7-Zip) after downloading from the official EPA TSCA Inventory Access Page .

Use this to find the quadrennial reports on chemical production and use volumes. How to Access the TSCA Inventory | US EPA