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353-59-3

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353-59-3 Usage

Chemical Properties

Chlorodifluorobromomethane is a colorless gas or liquid under pressure.

Definition

ChEBI: A one-carbon compound that is methane in which the hydrogens have been replaced by two fluorines, a bromine, and a chlorine. Widely used in 'vapourising liquid'-type fire extinguishers, its use is now generally banned under the Montreal Protocol (ozone-dep eting substances), although it is still used in certain applications (e.g. aviation).

General Description

BROMOCHLORODIFLUOROMETHANE is a colorless, nonflammable gas. BROMOCHLORODIFLUOROMETHANE is mildly toxic by inhalation. BROMOCHLORODIFLUOROMETHANE can asphyxiate by the displacement of air. Exposure of the container to prolonged heat or fire may cause BROMOCHLORODIFLUOROMETHANE to rupture violently and rocket. BROMOCHLORODIFLUOROMETHANE is used as a refrigerant gas.

Reactivity Profile

BROMOCHLORODIFLUOROMETHANE is chemically inert in many situations, but can react violently with strong reducing agents such as the very active metals and the active metals. Can react with strong oxidizing agents or weaker oxidizing agents under extremes of temperature.

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

Mutation data reported. An asphyxiant. See also ARGON for description of inert gas asphyxiants. When heated to decomposition it emits very toxic fumes of Br-, Cl-, and F-

Potential Exposure

Used as a refrigerant and fire extinguishing agent.

Shipping

UN1974 Chlorodifluorobromomethane or Refrigerant gas R-12B1, Hazard Class: 2.2; Labels: 2.2- Nonflammable compressed 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.

Incompatibilities

The liquefied gas poured into water may be violently explosive. This is due to the phase transition from superheated liquid to vapor. Chlorodifluorobromomethane is generally chemically inert; however, it can react violently with strong reducing agents such as hydrides and highly active metals. It will react with strong oxidizers (chlorates, nitrates, peroxides, permanganates, perchlorates, chlorine, bromine, fluorine, etc.); contact may cause fires or explosions. Keep away from alkaline materials, strong bases, strong acids, oxoacids, epoxides strong oxidizing agents. It can also react with weak oxidizers under extreme temperatures.

Waste Disposal

Return refillable compressed gas cylinders to supplier.

Check Digit Verification of cas no

The CAS Registry Mumber 353-59-3 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 3,5 and 3 respectively; the second part has 2 digits, 5 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 353-59:
(5*3)+(4*5)+(3*3)+(2*5)+(1*9)=63
63 % 10 = 3
So 353-59-3 is a valid CAS Registry Number.
InChI:InChI=1/CBrClF2/c2-1(3,4)5

353-59-3SDS

SAFETY DATA SHEETS

According to Globally Harmonized System of Classification and Labelling of Chemicals (GHS) - Sixth revised edition

Version: 1.0

Creation Date: Aug 12, 2017

Revision Date: Aug 12, 2017

1.Identification

1.1 GHS Product identifier

Product name bromochlorodifluoromethane

1.2 Other means of identification

Product number -
Other names Methane, bromochlorodifluoro-

1.3 Recommended use of the chemical and restrictions on use

Identified uses For industry use only.
Uses advised against no data available

1.4 Supplier's details

1.5 Emergency phone number

Emergency phone number -
Service hours Monday to Friday, 9am-5pm (Standard time zone: UTC/GMT +8 hours).

More Details:353-59-3 SDS

353-59-3Relevant articles and documents

Reaction of Atomic Bromine with Difluorochloromethane. The Heat of Formation of the CClF2 Radical and the Do (CClF2-H) Bond Dissociation Energy

Miyokawa, K.,Tschuikow-Roux, E.

, p. 7328 - 7331 (1992)

The gas-phase photobromination of CHClF2 (1) in the presence of CH3Cl (2) as competitor has been studied in the temperature range 80-150 deg C at halomethane pressures of ca. 35 Torr and a Br2 pressure of ca. 2.3 Torr.The temperature dependence of the rate constant ratio is found to obey the Arrhenius expression ln (k1/k2) = (-0.0885 +/- 0.0580) - (1144 +/- 20)/T.This result is combined with an earlier relative study of CH3Cl (2) vs C2H6 (3) and a recent direct determination by kinetic spectroscopy of the rate constant for the bromination of ethane (k3) to obtain absolute rate parameters for the reaction CHClF2 + Br -> CClF2 + HBr.Using a justifiable approximation concerning the magnitude of the activation energy difference for the reverse reactions between any two competitors of similar complexity, and other thermochemical data from the literature, the following quantities have been derived: ΔHfo298(CClF2) = -66.7 +/- 2 kcal mol-1 and Do(CClF2-H) = 100.7 +/- 2 kcal mol-1 where the uncwrtainties are conservative estimates.On the basis of the new value of k3, activation energies for the bromination of CH4 and other halomethanes are reported.

Kinetics of the Reactions of Halogenated Methyl Radicals with Molecular Bromine

Timonen, R. S.,Seetula, J. A.,Niiranen, J.,Gutman, D.

, p. 4009 - 4014 (2007/10/02)

The kinetics of seven reactions of halogenated methyl radicals (CH2Cl, CHCl2, CFCl2, CF2Cl, CF3, CH2Br, and CH2I) with molecular bromine were studied by using a heatable tubular reactor coupled to a photoionization mass spectrometer.Rate constants were measured as a function of temperature, typically between 296 and 532 K.Arrhenius activation energies were found to be small negative values (typically -2 kJ mol-1) for all reactions studied with the exception of that of the CF3 + Br2 reaction (whose activation energy is positive, but which could not determined accurately).The pattern of reactivity among 11 reactions of substituted methyl radicals with Br2 (which includes the 7 reactions studied here and 4 C(H)x(CH3)3-x + Br2 reactions (x = 0-3) studied earlier) has been accounted for by the inductive effect of the substituent atoms or groups.The sum of the Pauling electronegativities of these substituents provides a useful measure of their total inductive effect on the reaction rate constant.

PREPARATION OF HALO-F-METHANES VIA POTASSIUM FLUORIDE-HALOGEN CLEAVAGE OF HALO-F-METHYLPHOSPHONIUM SALTS

Burton, D. J.,Shin-Ya, S.,Kesling, H.S.

, p. 89 - 98 (2007/10/02)

Treatment of halo-F-methylphosphonium salts with potassium fluoride and halogen (I2, Br2, ICl, IBr) gives modest yields of halo-F-methanes.This method of preparation augments the classical Hunsdiecker approach to these materials.

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