Epoxide
Epoxide means a chemical compound consisting of a three-membered cyclic ether. Only emissions of epoxides listed in Table 4 of this subpart (i.e., ethylene oxide, propylene oxide, and epichlorohydrin) are regulated by the provisions of this subpart.
Source
40 CFR § 63.1423
Scoping language
The following terms used in this subpart shall have the meaning given them in subparts A ( 63.2), F ( 63.101), G ( 63.111), and H ( 63.161) as specified after each term: