21 CFR § 173.342 - Chlorofluorocarbon 113 and perfluorohexane.
---
identifier: "/us/cfr/t21/s173.342"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "21 CFR § 173.342 - Chlorofluorocarbon 113 and perfluorohexane."
title_number: 21
title_name: "Food and Drugs"
section_number: "173.342"
section_name: "Chlorofluorocarbon 113 and perfluorohexane."
chapter_name: "FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES"
subchapter_number: "B"
subchapter_name: "FOOD FOR HUMAN CONSUMPTION"
part_number: "173"
part_name: "SECONDARY DIRECT FOOD ADDITIVES PERMITTED IN FOOD FOR HUMAN CONSUMPTION"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
authority: "21 U.S.C. 321, 342, 348."
regulatory_source: "42 FR 14526, Mar. 15, 1977, unless otherwise noted."
cfr_part: "173"
---
# 173.342 Chlorofluorocarbon 113 and perfluorohexane.
A mixture of 99 percent chlorofluorocarbon 113 (1,1,2-trichloro-1,2,2-trifluoroethane) (CAS Reg. No. 76-13-1, also known as fluorocarbon 113, CFC 113 and FC 113) and 1 percent perfluorohexane (CAS Reg. No. 355-42-0) may be safely used in accordance with the following prescribed conditions:
(a) The additive chlorofluorocarbon 113 has a purity of not less than 99.99 percent.
(b) The additive mixture is intended for use to quickly cool or crust-freeze chickens sealed in intact bags composed of substances regulated in parts 174, 175, 177, 178, and § 179.45 of this chapter and conforming to any limitations or specifications in such regulations.
[55 FR 8913, Mar. 9, 1990]