PHOSPHORIC ACID TRIETHYL ESTER

PHOSPHORIC ACID TRIETHYL ESTER - Names and Identifiers

Name	Triethyl phosphate
Synonyms	TEP BHGUARD-TEP AURORA KA-1638 ETHYL PHOSPHATE Triethyl phosphate Flame retardant-TEP ETHYL ACID PHOSPHATE Phosphoric acid ethyl Ethyl phosphate, TEP Triethyl Phosphate (TEP) Phosphoric acid triethyl Triethylphosphatecolorlessliq PHOSPHORIC ACID TRIETHYL ESTER Phosphoric acid triethyl ester
CAS	78-40-0
EINECS	201-114-5
InChI	InChI=1/C6H15O4P/c1-4-8-11(7,9-5-2)10-6-3/h4-6H2,1-3H3
InChIKey	DQWPFSLDHJDLRL-UHFFFAOYSA-N

PHOSPHORIC ACID TRIETHYL ESTER - Physico-chemical Properties

Molecular Formula	C6H15O4P
Molar Mass	182.15
Density	1.072 g/mL at 25 °C (lit.)
Melting Point	-56 °C
Boling Point	215 °C (lit.)
Specific Rotation(α)	n20/D 1.403 (lit.)
Flash Point	240°F
Water Solubility	SOLUBLE
Solubility	Slightly hygroscopic, soluble in water, but gradually decomposes when the temperature rises. Soluble in ethanol, ether, acetone, ester, benzene, aliphatic hydrocarbons, aromatic hydrocarbons and chlorinated hydrocarbons and other organic solvents.
Vapor Presure	1 mm Hg ( 40 °C)
Vapor Density	6.28 (vs air)
Appearance	Transparent liquid
Specific Gravity	1.072
Color	Clear
Merck	14,9674
BRN	1705772
PH	7 (H2O, 20℃)
Storage Condition	Store below +30°C.
Stability	Stable. Combustible. Incompatible with strong oxidizing agents, water.
Sensitive	7: reacts slowly with moisture/water
Explosive Limit	1.2-10%(V)
Refractive Index	n20/D 1.403(lit.)
MDL	MFCD00009077
Physical and Chemical Properties	Character: colorless transparent liquid. melting point -56 ℃ boiling point 215 ℃ relative density 1.064 refractive index 1.404 flash point 115.5 ℃ soluble in ethanol, soluble in ether, benzene and other organic solvents, also soluble in water.
Use	It is used as a plasticizer for high boiling point solvents, rubber and plastics, and also used as a raw material for the preparation of pesticides, ethylation reagents, etc.

PHOSPHORIC ACID TRIETHYL ESTER - Risk and Safety

Hazard Symbols	Xn - Harmful
Risk Codes	R22 - Harmful if swallowed R36 - Irritating to the eyes
Safety Description	S25 - Avoid contact with eyes. S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.
WGK Germany	1
RTECS	TC7900000
TSCA	Yes
HS Code	29190090
Toxicity	LD50 orally in Rabbit: 1165 mg/kg

PHOSPHORIC ACID TRIETHYL ESTER - Upstream Downstream Industry

Raw Materials	Phosphorus trichloride Phosphorus oxychloride
Downstream Products	diketene Acetic anhydride

PHOSPHORIC ACID TRIETHYL ESTER - Nature

Open Data Verified Data

colorless transparent liquid, flammable. Relative density 1, 064. Melting Point -56 °c. Boiling point 21 5. Flash point 115.5 °c. Refractive index 404. Soluble in ethanol, soluble in ether, benzene and other organic solvents, but also soluble in water, but with the temperature rise will gradually hydrolyze.

Last Update：2025-06-10 22:55:16

PHOSPHORIC ACID TRIETHYL ESTER - Preparation Method

Open Data Verified Data

triethyl phosphate was formed by the reaction of phosphorus oxychloride with anhydrous ethanol. The final product is obtained by neutralization, filtration, dealcoholization, and fractional distillation under reduced pressure.

Last Update：2022-01-01 10:34:07

PHOSPHORIC ACID TRIETHYL ESTER - Introduction

Slightly hygroscopic, soluble in water, but gradually decomposes when the temperature rises. Soluble in ethanol, ether, acetone, ester, benzene, aliphatic hydrocarbons, aromatic hydrocarbons and chlorinated hydrocarbons and other organic solvents. It has a mild smell. It is stable at room temperature and extremely difficult to burn. It's irritating.

Last Update：2022-10-16 17:28:52

PHOSPHORIC ACID TRIETHYL ESTER - Application

Open Data Verified Data

used as a plasticizer for high-boiling solvents, rubber and plastics. It is also used as a raw material for the preparation of pesticide insecticides and as an ethylation reagent for the production of ketene.

Last Update：2025-08-19 16:24:40

PHOSPHORIC ACID TRIETHYL ESTER - Safety

Open Data Verified Data

triethyl phosphate produces anesthetic-like phenomena and significant muscle relaxation at fairly high doses. Inhibition of brain cholinesterase production. Has a stimulating effect on the skin and the surface of the respiratory tract. Rat oral LD50 800mg/kg. Production equipment should be sealed to prevent leakage. Operators should wear protective gear.
This product is packaged in glass bottles and reinforced with wooden cases. Storage should be protected from light, sun protection, to prevent water. According to the provisions of the storage and transportation of toxic chemicals.

Last Update：2022-01-01 10:34:08

PHOSPHORIC ACID TRIETHYL ESTER - Reference Information

LogP	1.11 at 20℃
NIST chemical information	information provided by: webbook.nist.gov (external link)
EPA chemical substance information	information provided by: ofmpeb.epa.gov (external link)
Introduction	triethyl phosphate has a wide range of applications, such as additives in textiles and paper products, plasticizers in plastics and coatings, non-reactive flame retardants, hardeners and accelerators, lubricants, flotation agents, defoamers, emulsifiers, stabilizers or extractants.
Use	for high boiling point solvents and plasticizers, also used in the preparation of pesticides and waterproof compound preparation used as high boiling point solvent, rubber and plastic plasticizer, also used as raw materials for the preparation of pesticides, The product is a high boiling point solvent, rubber and plastic plasticizer. It is also a catalyst. It is also used as a raw material for the preparation of pesticides. And used as an ethylation reagent for the production of ketene. In Japan, 70% of this product is used for the catalyst and about 20% is used as the solvent. The main purposes are as follows:(1) catalyst xylene isomer catalyst; Olefin polymerization catalyst; Catalyst for manufacturing tetraethyl lead; Catalyst for manufacturing carbodiimide; Catalyst for displacement reaction of trialkyl boron and olefin; A catalyst for producing ketene by dehydration of acetic acid at high temperature; A catalyst for polymerization of styrene with conjugated diene compounds; And a function of preventing discoloration of fibers if used in the polymerization of terephthalic acid and ethylene glycol. (2) the solvent of cellulose nitrate and cellulose acetate; The solvent used to maintain the life of the organic peroxide catalyst; The solvent used for the dispersion of fluorinated ethylene; The polyester resin, peroxide agent and diluent for curing catalyst of epoxy resin. (3) stabilizers chlorine-based pesticides and stabilizers; Stabilizers for phenolic resins; Solid agents for sugar alcohol resins. (4) curing agent of dimethylphenol formaldehyde resin in synthetic resin; Softening agent of phenolic resin used in Shell molding; Softening agent of vinyl chloride; Plasticizer of vinyl acetate polymer; Flame retardant of polyester resin. rubber plastic flame retardant reinforcing agent; Pesticide insecticidal raw materials; Resin aging agent, stabilizer high boiling point solvent. Ethylation reagent. Plastics, gums, resins and other toughening agents. Pesticides. Preparation of fire retardant compounds high boiling point solvent, ketene production catalyst, ethylation reagent, nitrocellulose and cellulose acetate solvent.
production method	1. Obtained by the reaction of ethanol and phosphorus trichloride. Phosphorus oxychloride was reacted with ethanol to form triethyl phosphate. The final product is obtained by neutralization, filtration, dealcoholization, and fractional distillation under reduced pressure.
spontaneous combustion temperature	845 ° F.
toxic substance data	information provided by: pubchem.ncbi.nlm.nih.gov (external link)

Last Update：2024-04-09 21:11:58

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