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HFC-143a (Trifluoroethane)


Synonyms: 1,1,1-Trifluoroethane (IUPAC); Freon 143a; R143a; R-143a; HCFC143a
CAS No.: 420-46-2   EC No.: 206-996-5   RTECS No.:
Molecular Weight:  84.041
Molecular Formula: C2H3F3
Structural Formula: HFC-143a (Trifluoroethane)
m.p.: -111°C
b.p. (1 atm): -47.75°C
Density (25°C): 1.300g/cm3
Vapor Pressure: 1.247mPa
Critical T.: 73.15°C
Critical P.: 3.834 mPa
Critical Density: 0.455g/cm3
ODP: 0
GWP: 4300 (CO2=1)
Chemical and Physical properties: Stable in normal condition. Colorless and odorless gas.
(Note: isomer 1,1,2-Trifluoroethane: HFC-143b)


HFC-143a can be made by floridation reaction between HCFC-142b (1,1-difluoro-1-chloroethane) and hydrofluoric acid.


HCFC-143a is used as a component of azeotropic-like blend refrigerant such as R507 (with 50% HFC-143a), R404a (with 52% HFC-143a), R-408a (with 47% HFC-143a)


Items Specification
HFC-143a content, % 99.8 min
moisture, mg/kg 10 max
acidity,ppm 0.1 max
nonvolatile residues 100 mg/kg  max.

Standard Packaging

320kgs/400L steel cylinder; 730kg/926L (13 cylinders/20’ FCL); ISO tank
Filling ratio: 0.79

Packaging photos coming soon

Risks and Safety Information

HFC-143a is regulated by UN as flammable gas with UN 2035, Class 2.1, PG unknown
R-Phrase: R12
S-Phrase: S9, S16, S33
For more information, please see MSDS

Warning, flammable gas

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