CAS 25570-02-9: 3,3′,5,5′-Tetramethyl-1,1′-biphenyl

3,3?,5,5?-Tetramethyl-1,1?-Biphenyl

3,3',5,5'-Tetramethylbiphenyl is used as a precursor for the preparation of 3,3',5,5'-tetramethylenebiphenyl tetraanion. It is also used to prepare biphenyl-3,3',5,5'-tetracarboxylic acid by the oxidation of with potassium permanganate. This Thermo Scientific Chemicals brand product was originally part of the Alfa Aesar product portfolio. Some documentation and label information may refer to the legacy brand. The original Alfa Aesar product / item code or SKU reference has not changed as a part of the brand transition to Thermo Scientific Chemicals.

3,3',5,5'-Tetramethylbiphenyl is a ketone that is used as an epoxy. It has a high water uptake and good thermal properties. 3,3',5,5'-Tetramethylbiphenyl is not soluble in ether or methanol but can be dissolved in sulfonated solvents. This compound can be used as a polymer or as a membrane material due to its high permeability and conductivity. 3,3',5,5'-Tetramethylbiphenyl can be cross-linked with other compounds and has been shown to have proton selectivities of 0.2-0.4 when the concentration of proton is greater than pH 5.