Ethyltriphenylphosphonium acetate Chemical Properties

Boiling point:

275℃[at 101 325 Pa]

Density 

1.05

vapor pressure 

0Pa at 25℃

Flash point:

-17°(0°F)

form 

Liquid

color 

Yellow to dark brown

Water Solubility 

Soluble in water, alcohol.

Exposure limits

ACGIH: TWA 200 ppm; STEL 250 ppm (Skin)
OSHA: TWA 200 ppm(260 mg/m3)
NIOSH: IDLH 6000 ppm; TWA 200 ppm(260 mg/m3); STEL 250 ppm(325 mg/m3)

LogP

-0.64 at 23.5℃

CAS DataBase Reference

35835-94-0(CAS DataBase Reference)

EPA Substance Registry System

Phosphonium, ethyltriphenyl-, acetate (35835-94-0)

Safety Information

RIDADR 

UN1993

TSCA 

Yes

HazardClass 

3

PackingGroup 

II

MSDS

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Ethyltriphenylphosphonium acetate Usage And Synthesis

Description

Ethyltriphenylphosphonium Acetate, also known as ETPAAC, ETPAACc and TEPA, is a colourless to slightly yellow liquid with the chemical formula C22H23O2P. This quaternary phosphonium salt is available in a 70% by-weight solution in methanol. Notably, one mole of acetic acid is bound to each mole of ETPAAC. Furthermore, the material is mainly used for advancing and curing phenolic-based epoxy resins and serving as a phase transfer catalyst. Compared to amines, imidazoles, and quaternary ammonium salts, Ethyltriphenylphosphonium Acetate has considerably better latency and thermal stability. Further, it offers a low odour, minimal colour formation and controlled reactivity.

Uses

Ethyltriphenylphosphonium acetate is mainly used to advance and cure phenolic-based epoxy resins and as a phase transfer catalyst. It exhibits considerably better latency and thermal stability when compared to amines, imidazoles and quaternary ammonium salts. Furthermore, it has minimal odour, colour formation, and controlled reactivity. It decreases or eliminates side reactions and creates longer, straighter chain epoxy molecules with sharp molecular weight distribution.

Precautions

Store Ethyltriphenylphosphonium Acetate in a cool, dry, and well-ventilated area to ensure compliance with legal requirements. Keep ETPAAC away from heat sources and oxidizing agents to maintain safety and stability.

Ethyltriphenylphosphonium acetate(35835-94-0)Related Product Information

• Methyl(triphenyl)phosphonium chloride
• Triphenyl phosphate
• Ethyltriphenylphosphonium bromide
• ETHYLTRIMETHOXYSILANE
• Triphenylacetic acid
• Ethyltriphenylphosphonium acetate
• Benzyltriphenylphosphonium hydroxide