Preparation
glycerol?,4-Amino-1,2-dihydroxyanthracene-9,10-dione, 1-Nitrobenzene mixture of sulfuric acid and heating, and then into Sodium bisulfite compound
Properties and Applications
blue. Soluble in water, soluble in ethanol. In concentrated sulfuric acid for cherry red (release sulfur dioxide), after dilution blue green precipitation. Used for esters, hydrocarbon solvent, oil and paraffin color.
|
Standard
|
Light Fastness
|
Heat-resistant(℃)
|
water
|
Sodium Carbonate(5%)
|
Hydrochloric acid(5%)
|
|
Melting point
|
Stable
|
|
ISO
|
Well
|
218-220
|
150,200
Sublimation
|
Insoluble
|
No change
|
No change
|
![Naphtho[2,3-h]quinoline-7,12-disulfonic acid, 7,12-dihydro-5,6,7,12-tetrahydroxy-, disodium salt Structure](https://www.chemicalbook.com/CAS/20200331/GIF/12270-98-3.gif)