UN/NA Number Reference
DOT Class 2.2 Non-Flammable Gas placard

UN 1022: Chlorotrifluoromethane

49 CFR 172.101 Hazardous Materials Table·ERG 2024

DOT Classification and Shipping

UN 1022 is assigned the proper shipping name Chlorotrifluoromethane in the U.S. DOT Hazardous Materials Table (49 CFR 172.101). It is classified as a Class 2.2 Non-Flammable Gas material. Required label(s): 2.2.

Packing group indicates the degree of danger within a hazard class: PG I is high danger, PG II medium, PG III low. The proper shipping name, hazard class, UN number, and packing group together form the basic shipping description that must appear on shipping papers and, where required, on the package and placard.

Emergency Response (ERG Guide 126)

Hazards: May cause asphyxiation. May cause frostbite. Containers may rocket.

Fire: Let fire burn unless leak can be stopped. Cool surrounding containers with water.

Spill: Stop leak if safe. Ventilate area. Prevent gas from entering low areas.

Chemical and Physical Properties

Chlorotrifluoromethane is a colorless odorless gas. It is shipped as a liquefied gas under its own vapor pressure. It is noncombustible. It can asphyxiate by the displacement of air. Contact with the liquid can cause frostbite. Exposure of the container to prolonged heat or fire may cause it to rupture violently and rocket.

CAS Number: 75-72-9
Molecular Formula: CClF3
Molecular Weight: 104.46 g/mol
Color / Form: Colorless gas
Odor: Ethereal
Boiling Point: -114 F
Melting Point: -294 °F (USCG, 1999)
Specific Gravity: Critical density: 0.581 g/cu cm
Vapor Pressure: 24816 mmHg
Vapor Density: 1.298 at -22 F
Water Solubility: Water solubility = 60.1 mg/l @ 25 C
Log P: log Kow = 1.65

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Reference data compiled from the DOT Hazardous Materials Table (49 CFR 172.101), the 2024 Emergency Response Guidebook, and public chemical databases (PubChem, NIOSH, EPA). Always verify the correct shipping description against the current regulation and the manufacturer's SDS Section 14 before shipping.