Tabun

CAS RN:77-81-6

Cleanup Methods

Decontamination: Liquid: Small Areas: Puddles of liquid must be contained by covering with vermiculite, diatomaceous earth, clay, fine sand, sponges, or towels. Place the absorbed material into containers with a high density polyethylene liner. Decontaminate the area with copious amounts of aqueous sodium hydroxide solution (a minimum of 10 percent by weight). If sodium hydroxide solution is not available, then sodium carbonate may be used. Removal of porous material, including painted surfaces, that may have absorbed Nerve Agent liquid may be required as these materials could continue to re-release liquid and/or vapor after exposure has ceased. /"G" Series Nerve Agents/

Decontamination: Vapor: Small Areas: Ventilation. In heavily contaminated areas, decontamination with copious amounts of aqueous sodium hydroxide solution (a minimum of 10 percent by weight) may be required. If sodium hydroxide solution is not available, then sodium carbonate may be used. Removal of porous material, including painted surfaces, that may have absorbed Nerve Agent vapor may be required as these materials could continue to re-release vapor after exposure has ceased. /"G" Series Nerve Agents/

... Absorb liquids in vermiculite, dry sand, earth, peat, carbon, or a similar material and deposit in sealed containers. Keep this chemical out of confined spaces, such as a sewer, because of the possibility of an explosion, unless the sewer is designed to prevent the build up of explosive concentrations. ...

If decontamination cannot be left to natural processes, chemical neutralizers or removal must be used. ... Decontaminating agent DS2 is a general purpose decontaminant. It consists of 70% diethylenetriamine, 28% ethylene glycol monomethyl ether & 2% sodium hydroxide. DS2 reacts with both the nerve agents & blister agents to effectively reduce their hazards. ... Important limitations in the use of DS2 are: (a) personnel must remain masked because of the vapor; (b) rubber gloves must be worn to protect the hands; (c) it is a combustible liq, therefore it must not be allowed to get on hot metal surfaces such as running engines or exhaust pipes. /Chemicals in war/

Protection: Evacuation: Immediately isolate an area around any liquid or solid contamination for at least 700 feet in all directions. If possible, identify the agent and develop a downwind hazard diagram (see Table 3.2). Adjust the initial isolation distance as appropriate. Based on the type of release, amount of material aerosolized, persistence of the agent and local conditions (e.g., weather, population density, time of day), shelter in place until the initial cloud passes may be the most appropriate course of action since timely evacuation of the threatened downwind population may not be possible. Depending on the persistence of the agent and the potential for condensation of agent from the cloud, evacuation of the threatened population after passage of the initial cloud may be appropriate. /"G" Series Nerve Agents/

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