HP Gas

High-Purity HFC-23 (Trifluoromethane)

Properties and Classification

Colorless and odorless gas UN Number:
CAS Number: 75-46-7 Liquefied gas

* Refer to MSDS for detailed information on the properties and safety of the product.


Purity vol% Min. 99.999
Water volppm Max. 8
Acids as HCl volppm Max. 0.2
Other fluorocarbons volppm Max. 10
Air volppm Max. 20
High-Purity HFC-23 (Trifluoromethane)


Item 10L cylinder 47L cylinder
Size Inside diameter 140mm 232mm
Height (to the neck portion) 850mm 1370mm
Height (with a protective cap) * 1000mm 1520mm
Valve nozzle height (center) * 875mm 1380mm
Loading weight 8kg 35kg
Material Manganese steel

* Estimated values for when a standard valve is mounted on a standard cylinder. The accuracy of these values is not guaranteed.


Nozzle size Ø22 mm X 14 right-hand threads
Material BRASS

Physical & Chemical Properties

Item Unit Data
Chemical formula CHF3
Molecular weight 70.01
Boiling point °C -82.05
°F -115.6
Melting point °C -155
Liquid density (0°C, saturated liquid) kg/L 1.029
Gas density (0°C, saturated liquid) g/L 112.8
Specific gravity (air: 1) 2.417
Critical pressure MPa 4.87
kg/cm2 49.7
Critical temperature °C 25.65
Flammability Not applicable
Toxicity Not applicable
Latent heat of vaporization (0°C, 1013MPa) kJ/kg 143.4
Maximum permissible concentration (ACGIH) ppm
Explosive limit (in air)

Temperature – Vapor Pressure Curve

High-Purity HFC-23 (Trifluoromethane)