Solvents
REACH
Methyl chloride
CAS Number
74-87-3
EC Number
200-817-4
What is Methyl chloride?
Methyl chloride (CAS 74-87-3), also known as R-40, is a compressed liquefied gas used as a methylating agent and chemical intermediate.
Where is Methyl chloride used?
- Silicones: building block in synthesis and chlorosilane intermediates
- Polymer manufacturing: primary methylating agent for methylcellulose and other cellulose ethers
- Agrochemical synthesis: methylating reagent for herbicides and plant growth regulators
- Pharmaceutical manufacturing: reaction solvent and intermediate in active ingredient synthesis
- It serves as a key building block in the synthesis of agricultural chemicals.
Commercial specifications
- Liquefied gas under pressure; cylinders, drums, or ISO tank containers for bulk orders
- Technical and high-purity grades
- Purity specifications and packaging configurations vary by supplier and end-use requirement
Other Names (Synonyms)
R-40|Methane, chloro-|Artic|CH3Cl
What are the physical properties of Methyl chloride?
Melting Point -97 °C
Boiling Point -23.7 °C
Density 0.911 g/cm³ @ Temp: 25 °C
Flash Point <-30 °F
Appearance Methyl chloride is a colorless gas with a faint, sweet odor which is not noticeable at dangerous concentrations. The odor threshold is 10 ppm. Shipped as a liquefied compressed gas.
Color Colorless to Almost colorless
Odor faint sweet ethereal odor
Form Colorless gas
Water Solubility 5.347g/L(24.9 ºC)
Vapor Pressure 3796 mm Hg ( 20 °C)
Refractive Index 1.0007
How is Methyl chloride classified and handled safely? Learn More
Danger
GHS02· Flammable GHS04· Compressed Gas GHS08· Health Hazard GHS07· Irritant
Hazard Statements
H220 Extremely flammable gas
H280 Contains gas under pressure; may explode if heated
H302 Harmful if swallowed
H332 Harmful if inhaled
Precautionary Statements
P203 Obtain, consult and follow expert instructions for use.
P210 Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.
P222 Do not allow contact with air.
P260 Do not breathe dust/fume/gas/mist/vapours/spray.
Which trade and regulatory codes apply to Methyl chloride?
HS Code 2903.11.0010
UN Number 1993
ADR Class 3
Packing Group I
Storage Class 3 - Flammable liquids
WGK (Germany) 2