Difluorochloromethane Property

Melting point:

-146°C

Boiling point:

-40.8°C

Density 

1,18 g/cm³

refractive index 

1.2560

form 

Colorless, nearly odorless, nonflammable gas

Water Solubility 

Slightly soluble

Stability:

Stable.

CAS DataBase Reference

75-45-6(CAS DataBase Reference)

IARC

3 (Vol. 41, Sup 7, 71) 1999

NIST Chemistry Reference

Methane, chlorodifluoro-(75-45-6)

EPA Substance Registry System

HCFC-22 (75-45-6)

Safety

Hazard Codes 

F,N

Risk Statements 

40-59

Safety Statements 

23-59

RIDADR 

1018

Hazard Note 

Non-Flammable

DOT Classification

2.2 (Nonflammable gas)

HazardClass 

2.2

Hazardous Substances Data

75-45-6(Hazardous Substances Data)

Toxicity

LCLo inhalation in dog: 70pph

Hazard and Precautionary Statements (GHS)

Difluorochloromethane Chemical Properties,Usage,Production

Chemical Properties

colourless gas

Chemical Properties

Chlorodifluoromethane is a nonflammable, colorless, nearly odorless gas.

Uses

Refrigerant, low-temperature solvent, fluorocarbon resins, especially tetrafluoroethylene polymers.

Uses

Aerosol propellant; refrigerant; lowtemperature solvent

General Description

Difluorochloromethane is a colorless gas with an ethereal odor. Difluorochloromethane is shipped as a liquefied gas under its own vapor pressure. Difluorochloromethane is noncombustible. Difluorochloromethane can asphyxiate by the displacement of air. Contact with the liquid can cause frostbite. Toxic gases can be produced in fires involving Difluorochloromethane. Exposure of the container to prolonged heat or fire may cause Difluorochloromethane to rupture violently and rocket.

Air & Water Reactions

The liquefied gas poured into water can be violently explosive. This is due to the phase transition from superheated liquid to vapor.

Reactivity Profile

Difluorochloromethane is incompatible with the following: Alkalis, alkaline earth metals (e.g., powdered aluminum, sodium, potassium, zinc) .

Hazard

Asphyxiant. Central nervous system impairment, cardiac sensitization. Questionable carcinogen.

Health Hazard

Inhalation at greater than 10% concentration in air may cause narcosis. Liquid may cause frostbite.

Fire Hazard

Special Hazards of Combustion Products: Decomposition gases are toxic and irritating.

Safety Profile

Mddly toxic by inhalation. Experimental reproductive effects. Mutation data reported. An asphpant in hgh concentrations. At elevated pressures, 50% mixtures with air are combustible although ignition is dfficult. When heated to decomposition it emits toxic fumes of Fand Cl-. See also CHLORINATED HYDROCARBONS, ALIPHATIC; and FLUORIDES.

Potential Exposure

Chlorodifluoromethane is used as an aerosol propellant, refrigerant, and low-temperature solvent. It is used in the synthesis of polytetrafluoroethylene (PTFE).

Carcinogenicity

In one study, an oral dose of 300mg of HCFC 22/kg of body weight was given to 36 male and 36 female rats 5 days/week for 52 weeks. The rats were held for 125 weeks compared to controls. There was no evidence of any treatment related increase in tumors. In an inhalation study 60 male and 60 female rats were exposed by inhalation to levels of
5000 ppm of HCFC 22. The exposures were 4 h/day, 5 days/week for 104 weeks (rats) or 78 weeks (mice).

Shipping

UN1018 Chlorodifluoromethane, Hazard Class: 2.2; Labels: 2.2-Non-flammable compressed gas. Cylinders must be transported in a secure upright position, in a wellventilated truck. Protect cylinder and labels from physical damage. The owner of the compressed gas cylinder is the only entity allowed by federal law (49CFR) to transport and refill them. It is a violation of transportation regulations to refill compressed gas cylinders without the express written permission of the owner.

Incompatibilities

The liquefied gas poured into water can be violently explosive. This is due to the phase transition from superheated liquid to vapor. Chlorodifluoromethane reacts violently with alkalies and alkaline earth metals; powdered aluminum; sodium, potassium, and zinc; causing fire and explosion hazard. Moisture and rust cause slow decomposition, forming toxic gases. Attacks some plastics, rubber, and coatings. Decomposes in heat forming fumes of chlorine, hydrogen chloride, HF, and phosgene. Attacks magnesium and its alloys.

Waste Disposal

Return refillable compressed gas cylinders to supplier. Return to vendor or send to licensed waste disposal company.