40 CFR Part 63, Table 4

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

Organic HAP/chemical name[CAS No.]

1,3 Butadiene

(106990)

Butylene Oxide

(106887)

Epichlorohydrin

(106898)

Ethylene Oxide

(75218)

n-Hexane

(110543)

Methanol

(67561)

Propylene Oxide

(75569)

Toluene

(108883)

CAS No. = Chemical Abstracts Service Registry Number.

[65 FR 26505, May 8, 2000; 91 FR 13189, Mar. 18, 2026]