
Chinese name: tetraphenol violin synonyms: tetraphenol violin; nephthalphenol sulfol; nephthalphenol vinyl; nephthaldiphenolm; tetraphenol vinyl; tetraphenol vinyl; nephthalsulfonol; nephthalphenol sulfon; nephthaldiphenol vinyl english name: pyrocatechol violetcas: 115-41-3 molecular formula: c19h1407s molecular weight: 386. 38einecs: 204-088-3
Tetraphenol violet melting point 185 °c (dec.) (lit.) solubility h2o: 1 mg/ml, clear, red tcp purple chemical powder. Soluble in water and water-bearing alcohol, microsolble in cold, water-free ethanol and not in non-polar organic solvents (e. G., ether, benzene, diphenyl). Aqueous solutions are yellow, and when acidity increases, they are red by yellow, purple by ph6 and purple by ph9 and red by ph9. Aqueous solutions are stable but susceptible to oxidation。
Tequila phenol is used as a titanium indicator。





