Agent Name

Hexaethyltetraphosphate

CAS Number

757-58-4

Formula

C12-H30-O13-P4

Major Category

Pesticides

Synonyms

Bladan base; Ethyl tetraphosphate; Ethyl tetraphosphate, hexa-; HET; HETP; HTP; Hexaethyl tetraphosphate; Hexaethyltetrafosfat [Czech]; Tetraphosphate hexaethylique [French]; Tetraphosphoric acid, hexaethyl ester; [ChemIDplus] UN1611; UN1612

Category

Organophosphate Insecticides

Description

Yellow hygroscopic liquid; [Hawley]

Sources/Uses

Used as a contact insecticide; [Hawley] Used to control soft bodied insects and mites; [EPA OHM/TADS]

Comments

Mixture of ethyl phosphates and ethyl pyrophosphates; A cholinesterase inhibitor; [Hawley] A strong cholinesterase inhibitor; Miosis not accompanied by other symptoms has been reported by pilots of crop dusters and attributed to plane crashes due to lack of depth perception; [HSDB] Severely hazardous by all routes of exposure; A cholinesterase inhibitor with symptoms including weakness, diarrhea, blurred vision, muscle twitching, and pin-point pupils; [EPA OHM/TADS]

Restricted

Mixture with compressed gas not permitted for air or passenger rail transportation; [Hawley] Not currently registered for use in the US or Canada; [HSDB]

Exposure Assessment
BEI

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

Vapor Pressure

2.06E-8 mm Hg

Explanatory Notes

UN1612 refers to Hexaethyltetraphosphate in a compressed gas mixture, which is a TIH;

Adverse Effects
Other Poison

Organophosphate

Links to Other NLM Databases
Health Studies

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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: