Catechol Violet, Pyrocatecholsulfonphthalein; 4,4'-(1,1-Dioxido-3H-2,1-benzoxathiol-3-ylidene)bis[1,2-benzenediol]; 3,3-Bis(3,4-dihydroxyphenyl)-3H-2,1-benzoxathiole 1,1-Dioxide; NSC 8805; PKF;|Pyrocatechin Sulfonephthalein; Pyrocatechol Sulfonephthalein; 4,4'-(3H-2,1-Benzoxathiol-3-ylidene)bis-1,2-benzenediol S,S-Dioxide

Catechol violet is a synthetic dye that is used as an optical sensor for the determination of disease activity. This dye has been shown to have synergistic effects with other dyes and a number of analytical methods, such as solid phase microextraction and kinetic energy spectroscopy. Catechol violet binds to covalently-linked proteins and nucleic acids, which can then be detected by a variety of analytical methods such as radiation or thermodynamic data. The kinetic energy of the bond between the dye and covalently-linked proteins can also be used to determine their concentration.