Methyl chloride
CAS 74-87-3
EC 200-817-4
Formula CH3Cl
MW 50.49 g/mol
Solvents Plastics & PolymersAgriculture & FeedPharmaceuticals & Healthcare Solvent & CarrierPolymerization Initiation
Description
Methyl chloride (CAS 74-87-3), also known as R-40, R 40, F 40, and Artic, is a liquefied compressed gas with the molecular formula CH3Cl. It carries EC number 200-817-4 and has no assigned E-code. It is classified under HS code 2903.11.0010.
In silicone polymer production, methyl chloride acts as a solvent and reaction medium during the methylchlorosilane synthesis step, enabling controlled polymerization at scale. It also serves as a methylating agent in pharmaceutical manufacturing, where it introduces methyl groups into active ingredient precursors. In agricultural chemistry, it functions as a carrier solvent in the synthesis of certain herbicide intermediates.
Methyl chloride is supplied as a liquefied compressed gas in cylinders and bulk containers, subject to REACH registration requirements within the EU. Handling and storage must comply with applicable pressure vessel and hazardous gas transport regulations. Buyers should confirm grade specifications and purity certificates directly with the supplier prior to procurement.
In silicone polymer production, methyl chloride acts as a solvent and reaction medium during the methylchlorosilane synthesis step, enabling controlled polymerization at scale. It also serves as a methylating agent in pharmaceutical manufacturing, where it introduces methyl groups into active ingredient precursors. In agricultural chemistry, it functions as a carrier solvent in the synthesis of certain herbicide intermediates.
Methyl chloride is supplied as a liquefied compressed gas in cylinders and bulk containers, subject to REACH registration requirements within the EU. Handling and storage must comply with applicable pressure vessel and hazardous gas transport regulations. Buyers should confirm grade specifications and purity certificates directly with the supplier prior to procurement.
Physical Properties
| 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 |
Safety & Handling (Learn More)
Danger GHS02 GHS04 GHS08 GHS07
H
H220H280H302H332H336H340H341H351H360H361H370H371H372H373
P
P203P210P222P260P261P264P270P271P280P317P318P319P321P330P377P381P403P405P501P301+P317P304+P340P308+P316P403+P233P410+P403
Trade & Regulatory
| HS Code | 2903.11.0010 |
| UN Number | 1993 |
| ADR Class | 3 |
| Packing Group | I |
| Storage Class | 3 - Flammable liquids |
| WGK (Germany) | 2 |
Other Names
R-40chloromethanemonochloromethaneF 40R 40ArticCH3ClHCC 40
Related Products
Derivatives
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