Solvent Blue 74 Chemical Properties

Density 

2.088±0.06 g/cm3(Predicted)

pka

-1.67±0.20(Predicted)

EPA Substance Registry System

2,6-Anthracenedisulfonic acid, 4,8-diamino-9,10-dihydro-1,5-dihydroxy-9,10-dioxo- (128-86-9)

Solvent Blue 74 Usage And Synthesis

Preparation

C.I. Acid Blue 45 (by (a) 1,5-Dihydroxyanthracene-9,10-dione sulfonation, again nitrifying generated disulfonic Acid, then use Sodium sulfide reduction; (b) using Sodium bisulfite treatment 2,4,6,8-Tetrabromo-1,5-dihydroxyanthracene-9,10-dione or 1,5-Dihydroxy-2,6-dichloro-4,8-dinitroanthraquinone; (C) in the presence of copper with ammonia treatment 2,4,6,8-Tetrabromo-1,5-dihydroxyanthracene-9,10-dione?or?1,5-Dihydroxy-2,6-dichloro-4,8-dinitroanthraquinone?with hydrochloric Acid acidification.

Synthesis

4,8-Diamino-1,5-dihydroxyanthraquinone- 2,6-disulfonic acid is prepared from 1,5-dihydroxyanthraquinone by sulfonation, nitration, and reduction .

Properties and Applications

blue. Blue powder. In alkaline aqueous solution in have greater solubility. Light resistance, heat resisting fastness are high. Mainly used in high-grade adornment coloring.

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