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Description and features

Catonium BeTPC (Benzyltriphenylphosphonium Chloride) is a white to off-white powder, its chemical formula is C25H22ClP. BeTPC is a quaternary phosphonium salt mainly used in organic synthesis as a wittig reagent and as a phase transfer catalyst in the production of fluoroelastomers and printing inks. This material is highly soluble in water and polarizable solvents.

Benzyltriphenylphosphonium Chloride is also known as BeTPC, BzTPPCl and TPP-ZC.

Compared to amines, imidazoles and quaternary ammonium salts CatOnium BeTPC features considerable better latency and thermal stability. Further it offers a low odor, minimal color formation and controlled reactivity.

It decreases or eliminates side reactions and creates longer, straighter chain epoxy molecules which have a sharp molecular weight distribution


Europe and United States: Provided CatOnium BeTPC is on stock in our local warehouses our lead time is about one week if delivered in 20 KG drums.

Canada,  South America,  South Africa and other markets can also be served, please contact our sales department for more details.

This substance (CAS: 1100-88-5) has been registered registered under REACH (EC) 1907/2006.

Product Identification

CAS number1100-88-5
EC number214-154-3
HS code2931 39 90


AppearanceWhite to off white powder
Assay≥ 99.00 %
Water content≤ 0.50 %


CatOnium BeTPC (Benzyltriphenylphosphonium Chloride) is being used in: (powder) coatings, (fluoro)elastomers and in (epoxy) resins.


Available packaging: 20 / 25 / 50 / 200 KG.
Special packaging is available on request.


Store Benzyltriphenylphosphonium Chloride in a cool, dry and well-ventilated area and in line with  legal requirements.

Keep BeTPC away from heat sources and oxidizing agents


A Material Safety Data Sheets (MSDS) is available for CatOnium BeTPC and all other products supplied by Vesta Chemicals BV.

An MSDS describes the hazards of a product and explains how a product can be safely handled, used and stored. Besides it provides important regulatory and emergency response information for the purchased product.

Molecular and structural information

Molecular formulaC25H22ClP
Molecular weight388.87 g/mol
Chemical formula benzyltriphenylphosphonium chloride

Physicochemical information

Boiling pointNot tested
Relative density @ 20 ºC 1.21 g/cm3
Flash pointNot tested
Melting point323 – 332 °C
Partition coefficient (log Pow)-0,70 @ 20 ºC
Solubility in water74.3 g/L (20 ºC)
Vapor pressure (MGM)Not tested
Benzyltriphenylphosphonium Chloride | CAS: 1100-88-5 | Disclaimer. This information is supplied solely for informational purposes and Vesta Chemicals bv makes no guarantees or warranties, either expressed or implied, with respect to the accuracy and use of this data. All product warranties and guarantees shall be governed by the Standard Terms of Sale. Nothing in this document is legal advice or is a substitute for competent legal advice.