Agent Name

Trioctyl phosphate

Alternative Name

Tris(2-ethylhexyl) phosphate

CAS Number

78-42-2

Formula

C24-H51-O4-P

Major Category

Other Classes

Synonyms

Tris(2-ethylhexyl) phosphate; 1-Hexanol, 2-ethyl-, phosphate; 2-Ethyl-1-hexanol phosphate; 2-Ethylhexanol, phosphate triester; Disflamoll TOF; Flexol TOF; Flexol Plasticizer TOF; Kronitex TOF; Phosphoric acid, tris(2-ethylhexyl) ester; Phosphoric acid, tris(ethylhexyl) ester; TOF; Tri(2-ethylhexyl) phosphate; Tri(2-ethylhexyl)phosphate; Triethylhexyl phosphate; Tris(2-ethylhexy)phosphate; Tris(2-ethylhexyl)phosphate; Tris(ethylhexyl) phosphate; Tris-(2-ethylhexyl)fosfat [Czech]; [ChemIDplus] TEHP; [HSDB]

Category

Organophosphates, Other

Description

Colorless liquid; [ICSC] Clear colorless to pale yellow liquid; [CAMEO]

Sources/Uses

Used as a flame-retardant plasticizer for polyvinyl chloride and cellulose nitrate, an antifoaming agent, and a co-solvent in hydrogen peroxide production; [HSDB]

Comments

Decomposed by heating forming phosphine and phosphorous oxides; A skin and eye irritant; [ICSC] Irritating to skin and eyes; Low acute toxicity in mammals; Oral LD50 (rat) >36,800 mg/kg; Does not alter cholinesterases; Dermal absorption is expected to be low; [HSDB]; A moderate skin irritant, based on animal studies; [CHEMINFO] A skin and eye irritant; [eChemPortal: ERMA] An irritant; [MSDSonline]

Exposure Assessment
Vapor Pressure

8.25E-8 mm Hg

Lethal Concentration

LC50 (guinea pigs) = 450 mg/m3/30min

Links to Other NLM Databases
Health Studies

Human Health Effects from Hazardous Substances Data Bank:

Toxicity Information

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Related Information in HazMap
Other Information

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