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HYDROFLUOROCARBON-404A 54 of the toxicity of HFC-134a in a report titled Toxicity of Alternatives to Chlorofluorocarbons: HFC-134a and HCFC-123 (NRC 1996). Below is a brief description of the toxicity data presented in that evaluation and in new studies on HFC-134a. HFC-134A Chemical and Physical Properties Common name: FC-134 Chemical name: 1,1,1,2-Tetrafluoroethane Synonyms: HFC-134a; norflurane, 1,1,1,2- tetrafluoroethane; HFA-134a; 1,2,2,2- tetrafluoroethane; F-134a; R134a; refrigerant R134a CAS number: 811-97-2 Structural formula: CF3CFH2 Description: Colorless gas Molecular weight: 102.03 Boiling point: -26.5°C at 736 mm Hg Melting point: -101°C Density and specific gravity: 1.21 g/mL (liquid under pressure at 77°F) Vapor pressure: 96 psia at 25°C Flash point and flammability: Nonflammable Solubility: 0.15% in water; soluble in ether Octanol and water partition coefficient: Ppw = 1.06 Conversion factors: 1 ppm = 4.20 mg/m3 1 mg/m3 = 0.24
