Agent Name


Alternative Name


CAS Number




Major Category

Toxic Gases & Vapors


GA; Dimethylamidoethoxyphosphoryl cyanide; Dimethylaminocyanphosphorsaeureaethylester [German]; Dimethylphosphoramidocyanidic acid, ethyl ester; EA 1205; Ethyl N,N-dimethylphosphoramidocyanidate; Ethyl N-dimethylphosphoramidocyanidate; Ethyl dimethylamidocyanophosphate; Ethyl dimethylphosphoramido cyanidate; Ethyl dimethylphosphoramidocyanidate; Ethyl phosphorodimethylamidocyanidate; Ethylester-dimethylamid kyseliny kyanfosfonove [Czech]; GA [Chemical Warfare Agent]; Gelan I; Le-100; Nerve agent; O-Ethyl N,N-dimethylphosphoramidocyanidate; T-2104; TL 1578; Taboon A; Trilon 83; Phosphoramidocyanidic acid, N,N-dimethyl-, ethyl ester; Phosphoramidocyanidic acid, dimethyl-, ethyl ester; [ChemIDplus] UN2810


Chemical Weapons


Colorless to brown liquid with a mild fruity odor; Odorless when pure; [U.S. Army SBCCOM MSDS]


Chemical warfare


Tabun is a colorless to brown liquid with a fruity odor and a vapor pressure of 0.037 at 68 degrees F. It persists in the soil with a half-life of 1-1.5 days. [Jane, p. 81-2] "TABUN (GA) has an especially rapid onset of action, which on a weight basis is less potent than VX. The human fatal dose has been reported to be 0.01 mg/kg." [HSDB] "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] An extremely poisonous cholinesterase inhibitor; Can be absorbed through skin and eyes; [Merck Index]

Reference Link

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

Exposure Assessment


Vapor Pressure

0.07 mm Hg

Lethal Concentration

LCLo (human) = 150 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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