3,3'-Di(sulfonyloxy-group-containing)substituted benzidine derivatives
US4008267A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 16, 1974 |
| Grant date | Feb 15, 1977 |
| Priority date | — |
| Expiry date | Oct 16, 1994 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC12Q2326/10
- WIPO fieldBiotechnology
- WIPO sectorChemistry
Abstract
Disclosed are benzidine derivatives substituted in each of the 3,3'-positions by the substituent ##STR1## wherein W is hydrogen or an alkali metal, the subscript n is zero when A is the divalent branched chain alkylene having from 2 to about 7 carbon atoms, and n is one when A is straight chain divalent alkylene with 3 or 4 carbons. Also disclosed are the corresponding derivatives wherein the sulfonyl group is replaced by the carbonyl group. Further disclosed are chromogen-reactive indicator compositions having as their chromogen constituent one of the foregoing benzidine derivatives. These compositions (1) are useful to test for a substance for which there exists a specific oxygen-oxidoreductase, such as a sugar, an amino acid, uric acid, and the like, and thus (2) contain also a peroxidase, a hydrogen-peroxide-oxidoreductase, and a specific oxygen-oxidoreductase for the specific material in the testing of which the composition is to be used.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.