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

Dielectric constant

6.1（24℃）

Stability:

Stable.

LogP

1.080

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

OEB

A

OEL

TWA: 1000 ppm (3500 mg/m3), STEL: 1250 ppm (4375 mg/m3)

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)

Symbol(GHS)

Signal word

Danger

Hazard statements

H280Contains gas under pressure; may explode if heated

Precautionary statements

P410+P403Protect from sunlight. Store in a well-ventilated place.

Difluorochloromethane Chemical Properties,Usage,Production

Description

Chlorodifluoromethane is a nonflammable,colorless, nearly odorless gas. Molecular weight =86.47;Specific gravity (H2O:1) 5=1.21; Boiling point =-40.5℃;Freezing/Melting point =-146℃; Vapor pressure =9.4atm at 20℃; Autoignition temperature=632℃. HazardIdentification (based on NFPA 704 M Rating System):Health 2, Flammability 0, Reactivity 0. Soluble in water;solubility =0.3% at 25℃

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

Definition

ChEBI: Chlorodifluoromethane is a hydrochlorofluorocarbon.

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).

First aid

If this chemical gets into the eyes, remove anycontact lenses at once and irrigate immediately for at least15 min, occasionally lifting upper and lower lids. Seek medical attention immediately. If this chemical contacts theskin, remove contaminated clothing and wash immediatelywith soap and water. Seek medical attention immediately. Ifthis chemical has been inhaled, remove from exposure,begin rescue breathing (using universal precautions, including resuscitation mask) if breathing has stopped and CPR ifheart action has stopped. Transfer promptly to a medicalfacility. When this chemical has been swallowed, get medical attention. Give large quantities of water and inducevomiting. Do not make an unconscious person vomit.If frostbite has occurred, seek medical attention immediately; do NOT rub the affected areas or flush them withwater. In order to prevent further tissue damage, do NOTattempt to remove frozen clothing from frostbitten areas. Iffrostbite has NOT occurred, immediately and thoroughlywash contaminated skin with soap and water.

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).

storage

Nonflammable gas. Color Code—Green: Generalstorage may be used. Prior to working with chlorodifluoromethane you should be trained on its proper handling andstorage. Store in tightly closed containers in a cool, wellventilated area. Sources of ignition, such as smoking andopen flames, are prohibited where this chemical is used,handled, or stored in a manner that could create a potentialfire or explosion hazard. Procedures for the handling, use,and storage of cylinders should be in compliance withOSHA 1910.101 and 1910.169, as with the recommendations of the Compressed Gas Association. A regulated,marked area should be established where this chemical ishandled, used, or stored in compliance with OSHAStandard 1910.1045.

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.