Water-soluble tetrazolium compounds

Details Water-soluble tetrazolium compounds Water-soluble tetrazolium compounds

2004-07-13

2009-02-03

Saeed, Kamal A (Department: 1626)

Organic compounds -- part of the class 532-570 series

Organic compounds

Azo

C435S025000, C435S026000

Reexamination Certificate

active

07485705

ABSTRACT:
The purpose of the present invention is to provide a water-soluble tetrazolium compound that will form a water-soluble formazan exhibiting long-wavelength absorption and is stable in aqueous solution for a long period and suitable for the quantitative analysis of dehydrogenases or substrates thereof. Disclosed is a water soluble tetrazolium compound expressed by the following general formula (1):wherein each of R1to R19independently represents hydrogen atom; nitro group; sulfonate group or alkyl, alkoxy, sulfoalkyl or sulfoalkyloxy groups having 1 to 4 carbon atoms; provided that each of at least two of R1to R19independently represents sulfonate group; or sulfoalkyl or sulfoalkyloxy groups having 1 to 4 carbon atoms; and M represents an alkali metal or ammonium ion.

REFERENCES:
patent: 6913878 (2005-07-01), Nakamura et al.

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