At ambient temperature and atmospheric pressure Methyl Chloride is a colourless inflammable gas heavier than air and with a very weak sweetish odour. In water it is only sparingly soluble but well in organic solvents. It can be liquefied by cooling below -24 C or by pressurizing to approx. 5 bar at 20 C, to give a clear, colourless fluid that will vaporize fast under room conditions generating much coldness.