The amount of time required to destroy residual chloromethyl methyl ether using various standard aqueous quench solutions (ammonium chloride solution, water, and sodium carbonate solution) has been measured.  In all cases, a solution of chloromethyl methyl ether in toluene/methyl acetate was destroyed (to within detection limit) after vigorous stirring with the quench solution for 15 minutes.
CMME is a known human carcinogen. Chronic exposure can increase the incidence of respiratory cancers, including small cell carcinoma. It is one of 13 chemicals regulated by the Occupational Safety and Health Administration despite not having an established permissible exposure limit.
It is classified as an extremely hazardous substance in the United States as defined in Section 302 of the U.S. Emergency Planning and Community Right-to-Know Act (42 U.S.C. 11002), and is subject to strict reporting requirements by facilities which produce, store, or use it in significant quantities. It listed in Schedule 1 Part 1 of Canada's Prohibition of Certain Toxic Substances Regulations.