Methyl chloride

CH₃Cl
CAS Number 74-87-3
UN1063 (gas)

Molecule
Properties
Applications
Safety & Compatibility
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Liquid / Gas Volumes

Calculate the volume or mass of a quantity of gas or liquid

Liquid Phase

At boiling point at 1.013 bar

m³ (Volume)

kg (Mass)

Gas Phase

In standard conditions (1.013 bar, 15°C)

m³ (Volume)

kg (Mass)

Physical Properties

Download the set of data (XLS - 79.98 KB)

General Properties
Solid Phase
Liquid Phase
Gas Phase

Molecule phase diagram showing the transition phases between solid, liquid and gas as a function of temperature and pressure

Pressure (bar)

- Molar mass 50.488 g/mol
- Content in dry air /
Critical Point
- Temperature 143.10 °C
- Pressure 66.8 bar
- Density 358.07 kg/m³
Triple Point
- Temperature -97.72 °C
- Pressure 8.821E-3 bar

Pressure 1.013 bar

Latent heat of fusion (at melting point)	127.377 kJ/kg
Melting point	- 97.72 °C

Pressure 1.013 bar

Boiling point	- 24.2 °C
Latent heat of vaporization (at boiling point)	431.444 kJ/kg
Liquid density (at boiling point)	1004.3 kg/m³

Pressure 1.013 bar

0 °C
15 °C
25 °C

Gas density	2.3083 kg/m³
Gas/(liquid at boiling point) equivalent	435.42 vol/vol
Specific gravity	1.8
Thermal conductivity	9.412 mW/(m.K)
Vapor pressure	2.599 bar
Viscosity	1.019E-4 Po
Gas density (at boiling point)	2.5595 kg/m³

Gas density	2.1782 kg/m³
Gas/(liquid at boiling point) equivalent	435.42 vol/vol
Specific gravity	1.8
Thermal conductivity	10.32 mW/(m.K)
Vapor pressure	4.272 bar
Viscosity	1.0697E-4 Po

Gas density	2.1001 kg/m³
Gas/(liquid at boiling point) equivalent	435.42 vol/vol
Specific gravity	1.8
Thermal conductivity	10.941 mW/(m.K)
Vapor pressure	5.768 bar
Viscosity	1.1033E-4 Po

Applications

Examples of uses of this molecule in Industry and Healthcare

Chemicals

Methyl chloride is used mainly in the production of silicones. Methyl chloride is also used in the production of agricultural chemicals, methyl cellulose, quaternary amines and butyl rubber.

Safety & Compatibility

Major Hazards
Material Compatibility

GHS02

Flammable

GHS04

Gas under pressure

GHS08

Serious health hazard

Autoignition Temperature, Flammability Limits & Flash Point

Europe (according to EN1839 for Limits and EN 14522 for autoignition temperature)

Autoignition temperature (Chemsafe)	625 °C
Lower flammability limit (IEC 80079-20-1)	7.6 vol%
Upper flammability limit (IEC 80079-20-1)	19 vol%

US (according to ASTM E681 for Limits and ASTM E659 for autoignition temperature)

Autoignition temperature (NFPA 325)	632 °C
Flash point (NPFA 325)	- 50 °C
Lower flammability limit (NFPA 325)	8.1 vol%
Upper flammability limit (NFPA 325)	17.4 vol%

Threshold of toxicity

PEL USA OSHA (vol)

100 ppm

Odor

Faintly sweet

Metals

Aluminium	Not recommended
Brass	Satisfactory
Monel	Satisfactory
Copper	No data
Ferritic Steel	Satisfactory
Stainless steel	Satisfactory
Zinc	No data
Titanium	No data

Plastics

Polytetrafluoroethylene	Satisfactory
Polychlorotrifluoroethylene	Satisfactory
Polyvinylidene fluoride	Satisfactory
Polyvinyl chloride	Significant swelling Not recommended
Ethylene tetrafluoroethylene	No data
Polycarbonate	No data
Polyamide	Satisfactory
Polypropylene	Significant swelling Not recommended

Elastomers

Butyl (isobutene- isoprene) rubber	Significant swelling Not recommended
Nitrile rubber	Significant swelling Not recommended
Chloroprene	Significant swelling Not recommended
Chlorofluorocarbons	No data
Silicone	Significant swelling Not recommended
Perfluoroelastomers	Satisfactory
Fluoroelastomers	Satisfactory
Neoprene	No data
Polyurethane	Significant swelling Not recommended
Ethylene-Propylene	Significant swelling Not recommended

Lubricants

Hydrocarbon based lubricant	Significant loss of mass Not recommended
Fluorocarbon based lubricant	Significant loss of mass Not recommended

Materials compatibility

Recommendations : Air Liquide has gathered data on the compatibility of gases with materials to assist you in evaluating which materials to use for a gas system. Although the information has been compiled from what Air Liquide believes are reliable sources (International Standards: Compatibility of cylinder and valve materials with gas content; Part 1- Metallic materials: ISO11114-1 (March 2012), Part 2 - Non-metallic materials: ISO11114-2 (April 2013), it must be used with extreme caution and engineering judgement. No raw data such as these can cover all conditions of concentration, temperature, humidity, impurities and aeration. It is therefore recommended that this table is only used to identify possible materials for applications at high pressure and ambient temperature. Extensive investigation and testing under the specific conditions of use need to be carried out to validate a material selection for a given application. Contact the regional Air Liquide team for expertise service.

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More information

Due to their ozone-depleting effect, the production of refrigerants is continuously decreasing, based on Montreal protocol requirements. Their use is controlled and they are progressively being replaced.