Chemical name: Butyltriphenylphosphonium Chloride
CAS number: 13371-17-0

Description and Features
Catonium BTPC (Butyltriphenylphosphonium Chloride) is a white to greyish powder, its chemical formula is C22H24ClP. BTPC is a quaternary phosphonium salt which is used in organic synthesis as a wittig reagent and as a phase transfer catalyst. This material is highly soluble in water and polarizable solvents.

Butyltriphnylphosphonium Chloride is also known as BTPC, BTPPC, BuTPPC and TPBP-Cl.

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

Product Information

CAS number13371-17-0
EC number 236-443-3
HS code2931 39 90

Molecular and structural information

Molecular formulaC22H24ClP
Molecular weight354.86 g/mol
Smiles notation[Cl-].CCCC[P+](c1ccccc1)(c1ccccc1)c1ccccc1
Structural formula:butyltriphenylphosphonium chloride


AppearanceWhite to greyish powder
Assay≥98.00 %
Melting Point226 - 230 °C
Moisture content:≤1.00 %

Physicochemical Information

Flash point>270 ºC
Melting point223 - 228 ºC
Solubility in waterSoluble (20 ºC)

CatOnium BTPC (Butyltriphenylphosphonium Chloride) is being on organic synthesis as a wittig reagent and as phase transfer catalyst.

Available packaging: 20 KG fiber drums.
Special packaging is available on request.

Shipment Info
CatOnium BTPC is on stock the United States. Our lead time is about one week if delivered in 20 KG fiber drums.
Europe, Canada other markets can also be served, please contact our sales department for more details.

Store Butyltriphenylphosphonium Chloride in a cool, dry and well-ventilated area and in line with legal requirements.
Keep BTPC away from heat sources and oxidizing agents

This substance (CAS: 13371-17-0) has been pre-registered under REACH (EC) 1907/2006.

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

Butyltriphenylphosphonium Chloride: Disclaimer. This information is supplied solely for informational purposes and Vesta Intracon 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.