Agent Name

Demeton-S

CAS Number

126-75-0

Formula

C8-H19-O3-P-S2

Major Category

Pesticides

Synonyms

Demetonthiol; Diethyl S-(2-ethioethyl)thiophosphate; Ethanethiol, 2-(ethylthio)-, S-ester with O,O-diethyl; phosphorothioate; IS [Pesticide]; Isodemeton; Isosystox; Izosystox [Czech]; Mercaptofos teolovy [Russian]; O,O-Diaethyl-S(2-aethylthio-aethyl)-monothiophosphat [German]; O,O-Diethyl S-(2-(ethylthio)ethyl) phosphorothiolate; O,O-Diethyl S-(2-eththioethyl)phosphorothioate; O,O-Diethyl S-2-(ethylthio)ethyl phosphorothioate; O,O-Diethyl S-ethyl-2-ethylmercaptophosphorothiolate; O,O-Diethyl-S-(2-ethylthio-ethyl)-monothiofosfaat [Dutch]; O,O-Dietil-S-(2-etiltio-etil)-monotiofosfato [Italian]; O,O-Dietyl-S-2-etylmerkaptoetyltiofosfat [Czech]; PO-Systox; Phosphorothioic acid, O,O-diethyl S-(2-(ethylthio)ethyl) ester; Thiol systox; Thioldemeton; Thiophosphate de O,O-diethyle et de S-(2-ethylthio-ethyle) [French]; [ChemIDplus] UN3018

Category

Organophosphate Insecticides

Description

Colorless liquid; [ICSC] Liquid with an unpleasant odor; May be decomposed by light and air; [MSDSonline]

Sources/Uses

Formerly used as an insecticide; [HSDB]

Comments

A cholinesterase inhibitor that may cause CNS effects resulting in convulsions and respiratory depression; Can be absorbed through skin; [ICSC] Effects in high-dose animal studies include inhibition of cholinesterase activity and decreased growth rate, but no histological changes; [HSDB]

Exposure Assessment
BEI

Cholinesterase activity in red cells = 70% of individual's baseline, sample time discretionary; [ACGIH]

Vapor Pressure

0.000262 mm Hg

Explanatory Notes

The Guide in the Emergency Response Guidebook is for "Organophosphorus pesticide, liquid, toxic."

Adverse Effects
Other Poison

Organophosphate

Links to Other NLM Databases
Health Studies

Human Health Effects from Hazardous Substances Data Bank:

Toxicity Information

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Chemical Information

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Biomedical References

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Related Information in HazMap
Diseases

Occupational diseases associated with exposure to this agent:

Processes

Industrial Processes with risk of exposure: