Difluoromethane

Difluoromethane
Difluoromethane-2D-skeletal
Difluoromethane-2D-skeletal
Spacefill model of difluoromethane
Spacefill model of difluoromethane
Names
Preferred IUPAC name
Difluoromethane[1]
Other names
Carbon fluoride hydride

Methylene difluoride
Methylene fluoride

Freon-32[citation needed]
Identifiers
3D model (JSmol)
Abbreviations HFC-32

R-32
FC-32

1730795
ChEBI
ChEMBL
ChemSpider
ECHA InfoCard 100.000.764 Edit this at Wikidata
EC Number
  • 200-839-4
259463
MeSH Difluoromethane
RTECS number
  • PA8537500
UNII
UN number 3252
  • InChI=1S/CH2F2/c2-1-3/h1H2 checkY
    Key: RWRIWBAIICGTTQ-UHFFFAOYSA-N checkY
  • InChI=1/CH2F2/c2-1-3/h1H2
    Key: RWRIWBAIICGTTQ-UHFFFAOYAC
  • FCF
Properties
CH2F2
Molar mass 52.024 g·mol−1
Appearance Colourless gas
Density 1.1 g cm−3(in liquid form)
Melting point −136 °C (−213 °F; 137 K)
Boiling point −52 °C (−62 °F; 221 K)
log P -0.611
Vapor pressure 1,518.92 kPa (220.301 psi) (at 21.1 °C [70.0 °F; 294.2 K])
Hazards
GHS labelling:
GHS02: Flammable
Danger
H220
P210, P377, P381, P403, P410+P403
NFPA 704 (fire diamond)
NFPA 704 four-colored diamondHealth 1: Exposure would cause irritation but only minor residual injury. E.g. turpentineFlammability 4: Will rapidly or completely vaporize at normal atmospheric pressure and temperature, or is readily dispersed in air and will burn readily. Flash point below 23 °C (73 °F). E.g. propaneInstability 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g. liquid nitrogenSpecial hazards (white): no code
1
4
0
648 °C (1,198 °F; 921 K)
Safety data sheet (SDS) MSDS at Oxford University
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
☒N verify (what is checkY☒N ?)

Difluoromethane, also called difluoromethylene, HFC-32 Methylene Fluoride or R-32, is an organic compound of the dihalogenoalkane variety. Invented in 1964 by Hoechst AG (not Daikin) it has the formula of CH2F2. It is a colorless gas in the ambient atmosphere and is slightly soluble in water, with a high thermal stability.[2][failed verification] Due to the low melting and boiling point, (−136.0 and −51.6 °C [−212.8 and −60.9 °F; 137.2 and 221.6 K] respectively) contact with this compound may result in frostbite.[2][failed verification] In the United States, the Clean Air Act Section 111 on Volatile Organic Compounds (VOC) has listed difluoromethane as an exception (since 1997) from the definition of VOC due to its low production of tropospheric ozone.[3] Difluoromethane is commonly used in endothermic processes such as refrigeration or air conditioning.

Further information: Difluoromethane (data page)
R32 - Difluoromethane
  1. ^ "Difluoromethane - Compound Summary". The PubChem Project. US: National Center of Biotechnological Information.
  2. ^ a b "Editorial Board". Journal of Fluorine Chemistry. 241: 109706. January 2021. doi:10.1016/s0022-1139(20)30404-8. ISSN 0022-1139. S2CID 243320092.
  3. ^ "Stratospheric Ozone Protection: The Montreal Protocol and Title VI of the Clean Air Act Amendments of 1990". Air & Waste. 43 (8): 1066–1067. August 1993. doi:10.1080/1073161x.1993.10467184. ISSN 1073-161X.