The system provides a CAS/Chemical Name look up link on the Chemical entry page of WHOPRS.
You can also refer to this link: https://cameochemicals.noaa.gov/
Use the link below to access the EPA List of Lists to identify Reportable Quantities and Threshold Planning Quantities for extremely hazardous substances..
https://www.epa.gov/epcra/epcracerclacaa-ss112r-consolidated-list-lists-march-2015-version