difluoromethane

High-Purity HFC-32 (Difluoromethane)

Properties and Classification

Appearance: Colorless and odorless gas UN Number: 3252
CAS Number: 75-10-5 Liquefied gas

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

Specification

Purity vol% Min. 99.99
Water volppm Max. 30
Acids as HCl volppm Max. 0.3
Other fluorocarbons volppm Max. 100
Air volppm Max. 100

Cylinder

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 weigh 1kg, 3kg, 5kg 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.

Valve

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

Physical & Chemical Properties

Item Unit Data
Chemical formula   CH2F2
Molecular weight   52.02
Boiling point °C -51.65
°F -61.1
Melting point °C -136
Liquid density (0°C, saturated liquid) kg/L 1.055
Gas density (0°C, saturated liquid) g/L 22.1
Specific gravity (air: 1)   1.7
Critical temperature °C 78.1
Critical pressure MPa 5.782
kg/cm2 57.5
Flammability Not applicable
Toxicity   Not applicable
Latent heat of vaporization (0°C, 1013MPa) kJ/kg 45.34
Maximum permissible concentration (ACGIH) ppm -
Explosive limit (in airßA35°C, 101.3kPa)   13.3ß`29.3

Temperature - Vapor Pressure Curve

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