Phosgene

CAS RN: 75-44-5

Disposal Methods

... "Destruction of chemical weapons" means a process by which chemicals are converted in an essentially irreversible way to a form unsuitable for production of chemical weapons, and which in an irreversible manner renders munitions and other devices unusable as such. ... Each /nation/ shall determine how it shall destroy chemical weapons, except that the following processes may not be used: dumping in any body of water, land burial or open-pit burning. It shall destroy chemical weapons only at specifically designated and appropriately designed and equipped facilities. ... Each /nation/ shall ensure that its chemical weapons destruction facilities are constructed and operated in a manner to ensure the destruction of the chemical weapons; and that the destruction process can be verified under the provisions of this Convention.
Generators of waste (equal to or greater than 100 kg/mo) containing this contaminant, EPA hazardous waste number P095 must conform with USEPA regulations in storage, transportation, treatment and disposal of waste.
If recycle of phosgene is not feasible, phosgene wastes can be handled most effectively through caustic scrubbing in packed columns.
A potential candidate for rotary kiln incineration at a temperature range of 820 to 1,600 deg C and residence times of seconds for liquids and gases, and hours for solids. A potential candidate for fluidized bed incineration at a temperature range of 450 to 980 deg C and residence times of seconds for liquids and gases, and longer for solids.
Pass controlled discharges of phosgene through a scrubbing tower, maintaining a 10% sodium hydroxide soln to decompose phosgene and convert to an alkaline chloride salt soln for disposal. Remove and isolate leaky cylinders (whose flow cannot be stopped) in an exhaust scrubber hood for discharge. Follow local regulations. Recommendable methods: Alkaline hydrolysis. Not recommendable methods: Evaporation & landfill. Peer-review: Extreme care: Phosgene is a highly toxic gas. Dilute the phosgene with air or nitrogen. Use properly engineered and constructed equipment. (Peer-review conclusions of an IRPTC expert consultation (May 1985))
Find more information on this substance at: PubChem, PubMed