| 摘要 |
This invention relates to sulfonate and phosphonate salts of tetrazolium compounds wherein the anion X.theta.is represented by the formula: (see formula I) wherein R is an organic radical suitable for increasing the solubility of the tetrazolium salt in an aqueous or polar non-aqueous solvent, and the tetrazolium salt is represented by the formula: (see formula II) wherein X.theta. is the anion, R1 and R2 are phenyl groups and R3 is phenyl or 2-thiazolyl wherein the phenyl groups are unsubstituted or substituted as represented by the formula: (see formula III) wherein the Y groups, which can be the same or different, are alkoxy, aryloxy, alkyl, amido, alkylamido; arylamido, alkylthio, arylthio, halo, hydrogen, hydroxy, carbamoyl, carbalkoxy; carboxyl, cyano, nitro, sulfo, sulfonamido; sulfanoyl, trialkylamino or ureido. These salts possess enhanced solubility in various solvents which renders them particularly suitable for use as redox indicators in dry reagent, diagnostic test systems.
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