dye|World dye variety

Name:C.I.Direct Black 83,C.I.31850

Molecular Structure: trisazo class

C.I.Direct Black 83,C.I.31850,CAS 6837-80-5,1086.92,C42H26N8Na4O14S4,Diazo Blue Black RS

Molecular Formula:C₄₂H₂₆N₈Na₄O₁₄S₄

Molecular Weight: 1086.92

CAS Registry Number:6837-80-5

Manufacturing Methods : 4-(4-Aminophenyl)benzenamine double nitriding, first with Naphthalen-1-amine coupling, product diazo again, and then in alkaline conditions and 4-Amino-5-hydroxynaphthalene-2,7-disulfonic acid(2 Moore) coupled.

Properties and Applications: red light black. Soluble in water for a blue-black, slightly soluble in ethanol for blue-ray gray. The strong sulfuric acid in dark green light blue, diluted as dark blue and purple, have precipitation. The dye solution to join strong hydrochloric acid for blue-ray black to dark blue, precipitation; With strong sodium hydroxide solution for blue-ray black to blue.

List of Suppliers:

Diazo Blue Black RS(  Bayer Group )