40 CFR § 63.64 - Additions of substances to the list of hazardous air pollutants.
---
identifier: "/us/cfr/t40/s63.64"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 63.64 - Additions of substances to the list of hazardous air pollutants."
title_number: 40
title_name: "Protection of Environment"
section_number: "63.64"
section_name: "Additions of substances to the list of hazardous air pollutants."
chapter_name: "ENVIRONMENTAL PROTECTION AGENCY"
subchapter_number: "C"
subchapter_name: "AIR PROGRAMS"
part_number: "63"
part_name: "NATIONAL EMISSION STANDARDS FOR HAZARDOUS AIR POLLUTANTS FOR SOURCE CATEGORIES"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "42 U.S.C. 7401"
regulatory_source: "57 FR 61992, Dec. 29, 1992, unless otherwise noted."
cfr_part: "63"
---
# 63.64 Additions of substances to the list of hazardous air pollutants.
(a) The substance 1-bromopropane, or 1-BP, also known as n-propyl bromide or nPB (CAS No. 106-94-5) is added to the list of hazardous air pollutants established by Clean Air Act (CAA) section 112(b)(1), 42 U.S.C. 7412(b)(1).
(b) [Reserved]
[87 FR 396, Jan. 5, 2022]