Noun
methyl chloride (uncountable)
(organic chemistry) chloromethane (CH3Cl)
It also has the lowest normal boiling point (−24.2 °C), which is where the vapor pressure curve of methyl chloride (the blue line) intersects the horizontal pressure line of one atmosphere ( atm ) of absolute vapor pressure. Source: Internet
These refrigerants were considered at the time to be less harmful than the commonly-used refrigerants of the time, including methyl formate, ammonia, methyl chloride, and sulfur dioxide. Source: Internet