Agent Name

Endothion

CAS Number

2778-04-3

Formula

C9-H13-O6-P-S

Major Category

Pesticides

Synonyms

5-Methoxy-2-(dimethoxyphosphinylthiomethyl) pyrone-4; 5-Methoxy-2-(dimethoxyphosphinylthiomethyl)pyrone-4; 7175 RP; AC-18,737; ENT 24,653; Endocid; Endocide; Exothion; FMC 5767; NIA-5767; Niagara 5767; O,O-Dimethyl S-(5-methoxypyronyl-2-methyl) thiophosphate; O,O-Dimethyl phosphorothioate S-ester with 2-(mercaptomethyl)-5-methoxy-4H-pyran-4-one; O,O-Dimethyl-S-((5-methoxy-pyron-2-yl)-methyl)-thiolphosphat [German]; Phosphate 100; Phosphopyron; Phosphopyrone; Phosphorothioic acid, O,O-dimethyl ester, S-ester with 2-(mercaptomethyl)-5-methoxy-4H-pyran-4-one; Phosphorothioic acid, S-((5-methoxy-4-oxo-4H-pyran-2-yl)methyl) O,O-dimethyl ester; S-((5-Methoxy-4-oxo-4H-pyran-2-yl)methyl) O,O-dimethyl phosphorothioate; S-((5-Methoxy-4H-pyron-2-yl)-methyl)-O,O-dimethyl-monothiofosfaat [Dutch]; S-((5-Methoxy-4H-pyron-2-yl)-methyl)-O,O-dimethyl-monothiophosphat [German]; S-((5-Metossi-4H-piron-2-IL)-metil)-O,O-dimetil-monotiofosfato [Italian]; S-(5-Methoxy-4-pyron-2-ylmethyl) dimethyl phosphorothioate; S-(5-Methoxy-4-pyron-2-ylmethyl) dimethyl phosphorothiolate; S-5-Methoxy-4-oxopyran-2-ylmethyl dimethyl phosphorothioate; S-5-Methoxy-4-pyron-2-ylmethyl O,O-dimethyl phosphorothioate; Thiophosphate de O,O-dimethyle et de S-((5-methoxy-4-pyronyl)-methyle) [French]; [ChemIDplus] UN2783

Category

Organophosphate Insecticides

Description

Solid; [HSDB]

Sources/Uses

Used as aphicide and acaricide in orchards and field crops; Not commercially sold in the US or Canada; Likely discontinued for pesticide use worldwide; [HSDB]

Comments

A cholinesterase inhibitor; [Hawley] No adverse effects observed in 7-day feeding study of rats at 50 ppm; [HSDB]

Exposure Assessment
BEI

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

Vapor Pressure

5.69E-6 mm Hg

Explanatory Notes

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

Flammability (NFPA)

1: Must be preheated

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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Related Information in HazMap
Diseases

Occupational diseases associated with exposure to this agent:

Processes

Industrial Processes with risk of exposure: