StacksVerified U.S. regulatory reference

40 CFR Part 63, Table 1

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov

As required in § 63.11494(a), chemical manufacturing operations that process, use, or produce the HAP shown in the following table are subject to subpart VVVVVV.

Type of HAPChemical nameCAS No.
1. Organic compoundsa. 1,3-butadiene106990
b. 1,3-dichloropropene542756
c. Acetaldehyde75070
d. Chloroform67663
e. Ethylene dichloride107062
f. Hexachlorobenzene118741
g. Methylene chloride75092
h. Quinoline91225
2. Metal compoundsa. Arsenic compounds
b. Cadmium compounds
c. Chromium compounds
d. Lead compounds
e. Manganese compounds
f. Nickel compounds
3. Othersa. Hydrazine302012