Product: Tetramethylphosphonium Bisulfate ([(CH₃)₄P]⁺[HSO₄]⁻)

CAS No.:22818-40-2

Hazard Class:8 (Corrosive)

UN No.: 3261 (Corrosive solid, acidic, organic)

Appearance:White crystalline solid

Description:Tetramethylphosphonium bisulfate is synthesized through quaternization of phosphine with dimethyl sulfate followed by ion exchange, serving as a specialty phase-transfer catalyst and ionic liquid precursor. Its unique properties include:

High thermal stability (decomposes >300°C)

Low viscosity in molten state (compared to ammonium analogs)

Applications:

Polymerization catalyst for epoxy resins

Electrolyte additive for lithium-ion batteries

Intermediate for phosphonium-based ionic liquids