BROMOTRIFLUOROMETHANE Property

Melting point:

-168°C

Boiling point:

-58°C

Density 

1,58 g/cm³

vapor pressure 

>760 at 20 °C (NIOSH, 1997)

refractive index 

1.2380

solubility 

Soluble in chloroform (Weast, 1986) and many other solvents, particularly chlorinated hydrocarbons.

form 

A gas

color 

Colorless gas with an ether-like odor

Water Solubility 

0.03 wt % at 20 °C (NIOSH, 1997)

Henry's Law Constant

(atm?m³/mol): 0.500 at 25 °C (Hine and Mookerjee, 1975)

Exposure limits

NIOSH REL: TWA 1,000 ppm (6,100 mg/m³), IDLH 40,000 ppm; OSHA PEL: TWA 1,000 ppm.

CAS DataBase Reference

75-63-8(CAS DataBase Reference)

EPA Substance Registry System

Halon 1301 (75-63-8)

Safety

Risk Statements 

20

Safety Statements 

23-36/37/39-38

RIDADR 

1009

DOT Classification

2.2 (Nonflammable gas)

HazardClass 

2.2

Hazardous Substances Data

75-63-8(Hazardous Substances Data)

Toxicity

LC₅₀ (inhalation) for mice 381 gm/m³, rats 416 gm/m³ (quoted, RTECS, 1985).

IDLA

40,000 ppm

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Warning

Hazard statements

H280Contains gas under pressure; may explode if heated

H336May cause drowsiness or dizziness

H420Harms public health and the environment by destroying ozone in the upper atmosphere

Precautionary statements

P261Avoid breathing dust/fume/gas/mist/vapours/spray.

P271Use only outdoors or in a well-ventilated area.

P304+P340IF INHALED: Remove victim to fresh air and Keep at rest in a position comfortable for breathing.

P312Call a POISON CENTER or doctor/physician if you feel unwell.

P403+P233Store in a well-ventilated place. Keep container tightly closed.

P405Store locked up.

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

P501Dispose of contents/container to..…

P502Refer to manufacturer/supplier for information on recovery/recycling

BROMOTRIFLUOROMETHANE Chemical Properties,Usage,Production

Chemical Properties

Trifluorobromomethane is a colorless gas with a slight ethereal odor. Shipped as a liquefied compressed gas.

Uses

Used as fire extinguishing agent for oil, electrical equipment, organic solvent, natural gas and a variety of organics, especially for important military and civilian sites.

Uses

Fire extinguishing agent; refrigerant.

Synthesis Reference(s)

Journal of the American Chemical Society, 68, p. 968, 1946 DOI: 10.1021/ja01210a017

General Description

A colorless, odorless gas at room conditions Shipped as a liquid confined under its own vapor pressure. Noncombustible. Nontoxic but can asphyxiate by the displacement of air. Contact with the unconfined liquid can cause frostbite by evaporative cooling. Exposure of the container to prolonged heat or fire can cause BROMOTRIFLUOROMETHANE to rupture violently and rocket.

Air & Water Reactions

Slightly soluble in water.

Reactivity Profile

BROMOTRIFLUOROMETHANE may react with aluminum to produce substantial heat. Other halogenated hydrocarbons, such as fluorotrichloromethane, dichlorodifluoromethane, chlorodifluoromethane, tetrafluoromethane produce sufficient heat in this way to melt aluminum pieces. The vigor of the reaction appears to depend on the degree of fluorination and the vapor pressure [Chem. Eng. News 39(27):44 1961].

Health Hazard

Vapors may cause dizziness or asphyxiation without warning. Vapors from liquefied gas are initially heavier than air and spread along ground. Contact with gas or liquefied gas may cause burns, severe injury and/or frostbite. Fire may produce irritating, corrosive and/or toxic gases.

Fire Hazard

Some may burn but none ignite readily. Containers may explode when heated. Ruptured cylinders may rocket.

Safety Profile

Wildly toxic by inhalation. Incompatible with aluminum. When heated to decomposition it emits toxic fumes of Fand Br-. See also BROMIDES and FLUORIDES.

Potential Exposure

This material is used as a fire extinguishing agent, a chemical intermediate, and as a refrigerant.

Shipping

UN1009 Bromotrifluoromethane or Refrigerant gas, R-13B, Hazard Class: 2.2; Labels: 2.2-Nonflammable gas. Cylinders must be transported in a secure upright position, in a well-ventilated 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.

Purification Methods

Purify the gas by passing it through a tube containing P2O5 on glass wool into a vacuum system where it is frozen out in a quartz tube and degassed by a cycles of freezing, evacuating and thawing. [Beilstein 1 III 83, 1 IV 73.]

Incompatibilities

Keep away from chemically active metals, such as calcium, powdered aluminum; zinc, magnesium. Attacks some plastics, rubber, and coatings.

Waste Disposal

Return refillable compressed gas cylinders to supplier. Incineration, preferably after mixing with another combustible fuel. Care must be exercised to assure complete combustion to prevent the formation of phosgene. An acid scrubber is necessary to remove the halo acids produced.