Q.
Introduction of Refrigerant Gas R32
A
Basic Introduction
Difluoromethane is an organic substance with a molecular formula of CH2F2 and a molecular weight of 52.02. It is a colorless gas and is partially miscible with water.
Used as a dry engraving agent, a substitute for low-temperature refrigerant R-502, or as a mixed refrigerant with HFC-134a and HFC-152a to replace HCFC-22
Chinese name Difluoromethane
CAS NO. 75-10-5
Chinese alias HFC-32
English name difluoromethane
English alias R-32
Molecular formula CH2F2
Molecular weight 52.02
CAS Number: 75-10-5
MDL number: MFCD00039283
EINECS number: 200-839-4
RTECS number: PA8537500
Physical Properties of R32 Gas
Physical property:
molecular formula
molecular weight
melting point,℃
density(25℃) liquid, g/cm³
critical temperature,℃
critical density ,g/cm³
water solubility℃,W%
ODP
GWP
CH2F2
52.02
-136
0.96
78.52
0.43
0.44
0
675
Quality Index of R32 Gas
Quality index
purity,%
moisture,%
acidity,%
evaporated residue,%
chloride (cl-)experiment
noncondensable gas(v/v),% 1.5
appearance
above 99.93%
≤0.001
≤0.0001
≤ 0.01
test permition
colorless transparent liquefied gas
Application of R32 Gas
Difluoromethane is a coolant with zero ozone depletion potential. Difluoromethane and pentafluoroethane can form a constant boiling mixture (called R-410A), which can be used as a substitute for chlorofluorocarbons (also known as Freon) in new coolant systems, mainly to replace HCFC-22 , As a compound medium and low temperature mixed refrigerant. Although it has zero ozone depletion potential, it has a high global warming potential, and its potential is 550 times that of carbon dioxide on a 100-year basis.