difluoromethane hfc-pg电子官方

 difluoromethane hfc-pg电子官方

difluoromethane hfc-32


molecular formula: ch2f2   difluoromethane(1,1-difluoromethane)         un no: 3252           danger class: 2.1

physical property:

molecular weight 52.02 boiling point(1amt)℃ -52
melting point,℃ -137 boiling point evaporation potential,kj/kg 390.5
density(25℃) liquid, g/cm3 0.960 vapour pressure(25℃),mpa 1.70
critical temperature,℃ 78.52 critical pressure,mpa 5.808
critical density ,g/cm³ 0.430 specific heat(25℃)liquid,kj/kg℃ 2.35
water solubility℃,w% 0.440 gwp100 677
odp 0    

quality index(hg/t 4634-2014):

appearance colorless, clear
purity,% ≥99.8
moisture,% ≤0.001
acidity,% ≤0.0001
evaporated residue,% ≤ 0.01
high boiling residue, ppm by volume ≤50
chloride,% pass
foul gas in air phase,% ≤1.5

packing specification: disposable cylinder 6.6lb/3kg; recyclable steel cylinder, 40l/30kg, 926l/670kg; iso tank.  

uses: used as refrigerant, important component for the substitute of r22.