Chemical name: Butyltriphenylphosphonium Bromide
CAS number: 1779-51-7

product sheet

Description and Features
Catonium BTPB (Butyltriphenylphosphonium Bromide) is a white to off-white powder, its chemical formula is C22H24BrP. BTPB 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, Epoxy Resins and Powder Coatings. This material is highly soluble in water and polarizable solvents.

Butyltriphenylphosphonium Bromide is also known as BTPB, BTPPB and TPBP-Br.

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

Product Information

CAS number1779-51-7
EC number 217-219-4
HS code2931 39 90
SensitivityHygroscopic

Molecular and structural information

Molecular formulaC22H24BrP
Molecular weight399.30 g/mol
Smiles notationBr.CCCCP(C1=CC=CC=C1)(C1=CC=CC=C1)C1=CC=CC=C1
InChi InChI=1/C22H25P.BrH/c1-2-3-19-23(20-13-7-4-8-14-20,21-15-9-5-10-16-21)22-17-11-6-12-18-22;/h4-18,23H,2-3,19H2,1H3;1H
InChi keyIKWKJIWDLVYZIY-UHFFFAOYSA-M
Structural formula:butyltriphenylphosphonium bromide

Specification

AppearanceWhite to off white powder
SolubilitySoluble in alcohol, sp. Soluble in water
Assay≥98.00 %
Melting Point242 - 243 °C
Loss on drying≤0.20 %
Triphenyl phosphine≤0.50 %
Ash≤0.30 %

Physicochemical Information

Decomposition temperature255 ºC
Melting point240 - 243 ºC
Solubility in waterSoluble (20 ºC)

Application
CatOnium BTPB (Butyltriphenylphosphonium Bromide) is being used in: (powder) coatings, (fluoro)elastomers and in epoxy resins.

Packaging
Available packaging: 25 KG fiber drums.
Special packaging is available on request.

Shipment Info
Europe and United States: Provided CatOnium BTBP is on stock in our local warehouses our lead time is about one week if delivered in 25 KG drums.
Canada, South America, South Africa and other markets can also be served, please contact our sales department for more details.

Storage
Store butyltriphenylphosphonium bromide in a cool, dry and well-ventilated area and in line with legal requirements.
Keep BTPB away from heat sources and oxidizing agents

REACH
This substance (CAS: 1779-51-7) has been pre-registered under REACH (EC) 1907/2006.

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.

MSDS
A Material Safety Data Sheets (MSDS) is available for CatOnium BTPB 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 Bromide: 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.

Applications