Tetraphenylphosphonium Bromide CAS 2751-90-8 TPPB

Product Name: Tetraphenylphosphonium Bromide
English Alias: TPPB; Phosphonium, tetraphenyl-, bromide
CAS Number: 2751-90-8
Molecular Formula: C₂₄H₂₀BrP
Molecular Weight: 419.30 g/mol
Appearance: White to off-white crystalline powder
Package: 1 kg/bag, 5 kg/bag (double sealed aluminum bags with desiccant)

What is Tetraphenylphosphonium Bromide？

Tetraphenylphosphonium Bromide is a quaternary phosphonium salt appearing as a white to off-white crystalline powder. It is soluble in water, methanol, and other polar solvents, but insoluble in non-polar solvents. The compound is widely used as a phase transfer catalyst, electrolyte, and chemical intermediate in organic synthesis and materials science due to its stable cationic properties.

COA (Certificate of Analysis):

Test Item	Specification	Result
Appearance	White to off-white powder	Complies
Purity (HPLC)	≥ 98.0%	99.2%
Melting Point	285-295°C	290°C
Water Content	≤ 0.5%	0.2%
Bromide Content	19.0-20.0%	19.5%
Heavy Metals (as Pb)	≤ 10 ppm	< 5 ppm

Application:

Phase Transfer Catalyst: Facilitates reactions between aqueous and organic phases

Electrochemical Research: Supporting electrolyte in electrochemical systems

Polymer Chemistry: Catalyst in polymerization reactions

Ionic Liquids: Precursor for phosphonium-based ionic liquids

Analytical Chemistry: Standard and reagent in analytical methods

Materials Science: Template agent for molecular sieves synthesis

Safety Profile:

Tetraphenylphosphonium Bromide may cause skin and eye irritation. Inhalation of dust may cause respiratory irritation. Use appropriate personal protective equipment including gloves, safety glasses, and dust mask when handling. Avoid breathing dust and ensure adequate ventilation. The substance may be harmful to aquatic life. For detailed safety information, always consult the full Safety Data Sheet (SDS).

Storage Requirements:

Store in a cool, dry, well-ventilated area away from direct sunlight. Keep containers tightly sealed and protected from moisture. Maintain storage temperature between 15-25°C. Relative humidity below 50% recommended. Handle under dry conditions when opening containers.

Transport & Packaging:

Tetraphenylphosphonium Bromide is packaged in double-sealed aluminum bags with desiccant (1 kg or 5 kg net weight per bag), placed in sturdy outer containers. Transport as non-hazardous material under normal conditions. Ensure containers are properly sealed and protected from moisture during transportation. Store away from incompatible materials.