A free tool to search by Chemical Name and CAS number: ESdat Online Chemistry Search.


ESdat Online Chemistry Search is a great resource for quickly and easily searching Chemical Names and their CAS numbers and is now available at ESdat Online.


The free tool is used to access thousands of CAS numbers and chemical names in a searchable format.

Chemicals can be searched either by the chemical name, e.g. Lead, or by their CAS number e.g. 1335-32-6. Where no CAS number exists for a chemical an ESDat ChemCode is available. The searchable database includes over 5500 chemical names and CAS numbers.

For each chemical name and CAS code links to further resources are available. These include

  • NIST National Institute of Standards and Technology Standard Reference Database

  • Scorecard data for information on pollutant problems and toxic chemicals

  • USEPA IRIS. The United States Environmental Protection Agency Integrated Risk Information System (IRIS)

  • IPCS INCHEM International Programme on Chemical Safety (IPCS) and the Canadian Centre for Occupational Health and Safety (CCOHS)

A short video (60s) demonstrating the ESdat Online Chemistry Search can be viewed here:


ESdat is a specialist environmental database system; used to validate, import, analyze and report a broad spectrum of Environmental Data as Exceedance Tables, Graphs, Maps, statistics and more.

ESdat is available as “ESdat Desktop”, “ESdat Server”, and a completely cloud (web) based “ESdat Online”.





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