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Methyl chloride
Features
Methyl chloride (CH3Cl) or monochloromethane also known as R40, is a colorless gas with an ethereal odor, heavier than air.
It's used in the chemical industry as a methylation agent in organic synthesis, for tetra methyl lead, silicones, and butyl rubber production, as a solvent or extraction agent for heat sensitive products as well as a refrigerant and propellant.