dye|World dye variety

Name:C.I.Direct Black 13,C.I.30025

Molecular Structure: trisazo class

C.I.Direct Black 13,C.I.30025,CAS 71902-05-1,750.63,C28H20N10Na2O9S2,Direct Fast Black SA

Molecular Formula:C₂₈H₂₀N₁₀Na₂O₉S₂

Molecular Weight: 750.63

CAS Registry Number:71902-05-1

Manufacturing Methods :  4-Nitrobenzenamine diazo, in acid conditions and 4-Amino-5-hydroxynaphthalene-2,7-disulfonic acid coupling, 4-Nitrobenzenamine diazo, in alkaline conditions and the synthesis product matches, will be one of the nitro reduction, again diazo, and Benzene-1,3-diamine coupling.

Properties and Applications: black. The strong sulfuric acid for green light gray, brown after dilute the precipitation; In nitric acid solution for brown. The dye solution to join hydrochloric acid solution for dark purple, precipitation; Sodium hydroxide solution to join the same color.

List of Suppliers:

Direct Fast Black SA( Aziende Colon Nazionali Affini (ACNA) )