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Inventory search by CAS number
Inventory search by keywords

Search with CAS numbers only. For multiple CAS number search, use comma (,) to separate CAS numbers. Example: 999-97-3, 4399-55-7

Use numbers and dash (-) only

Download the Inventory

Full list of chemicals on the Inventory - 10 February 2022.XLSX

Disclaimer:

This downloadable version of the Inventory is provided for convenience only and is not the official version of the Inventory. AICIS regularly updates and makes changes to the Inventory that are not incorporated in this downloadable version. The downloadable Inventory:

is a copy of the publicly available information on the Inventory as at 10 February 2022 and may not be complete, accurate and up-to-date
should not be relied on for the latest information about a chemical – you must search the online Inventory to see if your chemical is listed and what any terms of its listing are
does not include chemicals that cannot be disclosed to the public because the terms are confidentially listed on the Inventory
does not include URL links to assessment and evaluation statements

CAS Registry Numbers® are the intellectual property of the American Chemical Society, and are used with the express permission of CAS. Check the AICIS copyright statement for information about using material that AICIS publishes on its website (including the online Inventory and downloadable Inventory).

You must search for each chemical if you are importing or manufacturing (introducing) a product that has more than 1 ingredient.

Search by CAS number

This is the best method. A CAS number contains digits that are divided by hyphens into 3 parts.

Make sure you don't include a blank space at the start or between your numbers and hyphens.

The CAS Registry is maintained by CAS and they also assign CAS numbers to chemicals (for a fee). They have a limited free online resource called Common Chemistry for searching CAS numbers.

Other ways to try and find your CAS number include:

looking at Safety Data Sheets — you'll need to contact the manufacturer or supplier
through an internet search
search online catalogues of chemical suppliers

I've found my chemical — find out what your search results mean

I can't find my chemical — learn the reasons why and what to do next

International chemical databases

European Chemicals Agency (information about chemicals in Europe)
United States Environment Protection Agency Aggregated Computational Toxicology Resource
ACToR (Aggregated Computational Toxicology resource) is EPA's online warehouse of all publicly available chemical toxicity data and can be used to find all publicly available data about potential chemical risks to human health and the environment.
CosIng Database search page
This European Commission searchable database has information on cosmetic ingredients. It contains CAS RNs and International Nomenclature Cosmetic Ingredient (INCI) names and numbers.
National Library of Medicine
This United States' site lists chemicals and available toxicity information. It is useful for listing chemicals that are not on major inventories.
National Institute of Standards and Technology Chemistry (NIST) WebBook
This website of the U.S. Department of Commerce provides access to data compiled and distributed by NIST under the Standard Reference Data Program.
Common Chemistry (from Chemical Abstracts Service)

Searching by keyword

CAS proper name

If you do not have the CAS number your next best option is to search using the CAS name for the chemical.

Common names

Some common names for chemicals are on the Inventory but are restricted to the most commonly used chemicals. Your results will most likely be a very broad list of candidate chemicals.