10-Methyl-3-[3-(sodiosulfooxy)-1H-indol-2-yl]-11H-benzo[a]carbazol-4-ol (sulfuric acid sodium) salt Usage And Synthesis

Preparation

(a) in the presence of Pyridine , with Chlorosulfonic acid treatment ?C.I. Vat Black 2 leuco; (b) in the Pyridine with metal (such as copper, iron, zinc, etc) and Sulfur trioxide source (such as Sulfur trioxide, Chlorosulfonic acid or Methyl chlorosulfonate, etc.) processing ?C.I. Vat Black 2. The above two kinds of situation after alkaline, filter out insolubles, remove Pyridine and salting out.

Properties and Applications

blue light grey to blue black. Light gray powder. Soluble in water. Can be used for cotton fabric dyeing, affinity is low, add salt may help dye. Can also be used to direct, resist and discharge printing, discharge base color with light color effect is good.

10-Methyl-3-[3-(sodiosulfooxy)-1H-indol-2-yl]-11H-benzo[a]carbazol-4-ol (sulfuric acid sodium) salt(6711-18-8)Related Product Information

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