Chromotropic Acid

Name:
Chromotropic Acid
Detailed information:

Chemistry name:	1,8-dihydroxynaphthalene-3,6-disulfonic acid
Chemistry structure:
Properties:
White needles. Soluble in water; insoluble in alcohol and ether.
Derivation:
Reaction of H-acid with 10% NaOH at 280C.
Use:
Azo-dye intermediate, analytical reagent.