Agent Name


Alternative Name


CAS Number




Major Category

Toxic Gases & Vapors


GD; 1,2,2-Trimethylpropyl methylphosphonofluoridate; 1,2,2-Trimethylpropylester kyseliny methylfluorfosfonove [Czech]; 1-Methyl-2,2-dimethylpropylmethylphosphonofluoridate; 2-Butanol, 3,3-dimethyl-, methylphosphonofluoridate; 3,3-Dimethyl-2-butyl methylphosphonofluoridate; 3,3-Dimethyl-n-but-2-yl methylphosphonofluoridate; EA 1210; Methyl pinacolyl phosphonofluoridate; Methyl pinacolyloxy phosphorylfluoride; Methylfluorphosphorsaeurepinakolylester [German]; Methylphosphonofluoridic acid 1,2,2-trimethylpropyl ester; Methylphosphonofluoridic acid, 3,3-dimethyl-2-butyl ester; Nerve agent; PMFP; Phosphine oxide, fluoromethyl(1,2,2-trimethylpropoxy)-; Phosphonofluoridic acid, methyl-, 1,2,2-trimethylpropyl ester; Pinacoloxymethylphosphoryl fluoride; Pinacolyl methylfluorophosphonate; Pinacolyl methylphosphonofluoridate; Pinacolyl methylphosphonofluoride; Pinacolyloxy methylphosphoryl fluoride; Pynacolyl methylfluorophosphonate; T.2107; Zoman; [ChemIDplus] Lethal Nerve Agent (GD); [U.S. Army ECBC MSDS] UN2810


Chemical Weapons


Pure: Colorless liquid with a fruity odor; Impure: Amber or dark brown with an odor like oil of camphor; [U.S. Army ECBC MSDS]


Chemical warfare


Soman a colorless liquid with a fruity or oil of camphor odor and a vapor pressure of 0.4 mm Hg at 77 degrees F. It is relatively persistent in the soil. [Jane, p. 85-6] The LD50 on skin is 50 mg. The LCt50 is 70 mg-min/m3. Soman undergoes 'aging' in about two minutes. Treatment of casualties is more difficult than for other nerve agents that take longer to age. After two minutes, the usefulness of oximes is reduced. [USAMRICD, p. 107, 110] "As little as one drop of VX on the skin can be fatal and 1 to 10 mL of GA, GB, or GD can be fatal." [ATSDR Medical Management] A potent cholinesterase inhibitor; [Merck Index]

Reference Link

ATSDR - Medical Management: Nerve Agents: Tabun (GA); Sarin (GB); Soman (GD); and VX

Exposure Assessment


Vapor Pressure

0.4 mm Hg

Lethal Concentration

LCLo (human) = 70 mg/m3

Explanatory Notes

TIH when used as a weapon; [ERG 2012]

Adverse Effects
Other Poison


Links to Other NLM Databases
Health Studies

Human Health Effects from Hazardous Substances Data Bank:

Toxicity Information


Chemical Information

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Related Information in HazMap
Other Information

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