| abstract |
A BICARBONATE SALT OF AN INDAZOLIUM OR BENZIMIDAZOLIUM DYESTUFF WHICH IS USEFUL FOR THE PREPARATION OF CONCENTRATED SOLUTIONS OF DYESTUFFS. THE CONCENTRATED SOLUTIONS CAN BE DILUTED AND USED AS DYEBATHS. THE BICARBONATE HAS THE GENERAL FORMULA 3-((1,2-DI(ALK-)-2,3-DIHYDRO-1H-INDAZOL-3-YLIDENE)=N-N= 1,3-DI(CH3-),2-((4-X-PHENYL)-N=N-)BENZIMIDAZOLIUM, AND TWO TYPICAL FORMULAE FOR A ARE AS FOLLOWS A(+) (-)O-COOH WHERE X IS HYDROGEN, CHLORINE, METHYL OR METHOXY, THE BENZENE NUCLEI D1 AND D2 ARE UNSUBSTITUTED OR SUBSTITUTED BY CHLORINE OR NITRO, R3 IS HYDROGEN, ALKYL HAVING 1 TO 3 INCLUSVE CARBON ATOMS, PHENYL OR P-AINO PHENYL, AND ALK. REPRESENTS METHYL OR ETHYL. OTHER FORMULAE FOR A ARE GIVEN. C(-R2)-N(-N)-),1,2-DI(ALK-)INDAZOLIUM |