An official website of the United States government.

This is not the current EPA website. To navigate to the current EPA website, please go to www.epa.gov. This website is historical material reflecting the EPA website as it existed on January 19, 2021. This website is no longer updated and links to external websites and some internal pages may not work. More information »

"Regulatory Synonym" listings in Table 302.4 of 40 CFR 302.4

What determines whether a "Regulatory Synonym" is listed for a substance in Table 302.4 of 40 CFR 302.4?

In general, no entry is made in the "Regulatory Synonym" column of 40 CFR 302.4, Table 302.4 for a substance if only one chemical name is used to identify that substance under the environmental statutes and implementing regulations referred to in CERCLA section 101(14). If, however, a substance has more than one chemical name listed under these other statutes or regulations, then: (1) each chemical name will appear as a separate entry in Table 302.4 (as discussed above; and (2) each entry will include the other chemical name(s) (appearing as separate entries in Table 302.4) for that substance in the "Regulatory Synonym" column.