Dichlorodifluoromethane

Dichlorodifluoromethane is a listed refrigerant and direct-contact freezing agent. It is CFC-12, phased out globally under the Montreal Protocol for destroying ozone, so the listing has outlasted the substance's availability.

Where it is and isn’t permitted

Status of Dichlorodifluoromethane by jurisdiction. Every jurisdiction this site covers is listed, including those where the substance does not appear.
JurisdictionStatusScope and limitsCitation
United StatesFood and Drug AdministrationPermitted, with conditions21 CFR 173.355retrieved 2026-09-07
Codex AlimentariusCodex Alimentarius Commission / JECFANot listedDoes not appear on this jurisdiction’s permitted list. That is not the same as being prohibited.

What it is made from

Produced by fluorinating carbon tetrachloride. Production for most uses ceased under the Montreal Protocol.

  • Vegan
  • Vegetarian
InChIKey
PXBRQCKWGAHEHS-UHFFFAOYSA-N
PubChem
CID 6391

Every name it appears under

61 recorded names. A label may use any of them.

CAS registry number

  • 75-71-8

As it appears in regulation

  • Dichlorodifluoromethane

Other names

  • Algofrene type 2
  • Arcton 12
  • Arcton 6
  • Caswell No. 304
  • CCl2F2
  • CCRIS 3501
  • CFC 12
  • CFC-12
  • Chlorofluorocarbon 12
  • Chlorofluoromethane (CCl2F2)
  • dichloro(difluoro)methane
  • Dichloro-difluoro-methane
  • dichlorodifluormethane
  • dichlorodifluoro-methane
  • DICHLORODIFLUOROMETHANE
  • Dichlorodifluoromethane (NF)
  • Diclorodifluometano
  • Difluorodichloromethane
  • Dwuchlorodwufluorometan
  • Dymel 12
  • Electro-CF 12
  • EPA Pesticide Chemical Code 000014
  • Eskimon 12
  • FCC 12
  • FKW 12
  • Fluorocarbon 12
  • Fluorocarbon-12
  • Forane 12
  • Freon 12
  • Freon F-12
  • Freon-12
  • Frigen 12
  • Fron 12
  • Genetron 12
  • Halocarbon 12
  • Halon
  • Halon 122
  • HSDB 139
  • Isceon 122
  • Isot ron 2
  • Isotron 12
  • Isotron 2
  • Kaiser chemicals 12
  • Ledon 12
  • METHANE, DICHLORODIFLUORO
  • Methane, dichlorodifluoro-
  • OFM06SG1KO
  • Propellant 12
  • Propellent 12
  • R 12 (refrigerant)
  • R12 [UN1028] [Nonflammable gas]
  • RCRA waste no. U075
  • Rcra waste number U075
  • Refrigerant 12
  • Refrigerant R 12
  • Refrigerant R12
  • Sterethox
  • Ucon 12
  • Ucon 12/halocarbon 12

Hazard reference values

No reference value for this substance in the sources we hold.

Evidence and how bodies read it

Studies, and the differing conclusions regulators drew from them, are curated by hand rather than machine-read, and none has been written for this substance yet.

Sources for this page

  • ecfr retrieved 2026-09-07

Full licence terms and publisher details on Sources. How this page is built and updated: Method.

Machine-readable:/api/v1/additives/dichlorodifluoromethane.json