All chemical parameters in ESdat require a unique identifier called a ChemCode.
This list of ChemCodes is maintained by System Administrators and can be searched by all users using the Chemistry Lookup tool.
It is possible to download the full Chemistry Look up table to Excel, this lists every ChemCode with its ChemName.
The Chemistry Lookup tool is accessible from the ESdat Home menu.
Enter a ChemName or ChemCode to search, alternatively a search can be made for the CAS on external databases - NIST, Scorecard, USEPA IRIS, and IPCS.