Name:C.I.Direct Black 48,C.I.34000
Molecular Structure: trisazo class
Molecular Weight: 720.62
CAS Registry Number:6771-92-2
Manufacturing Methods : 5-Amino-2-hydroxybenzoic acid diazo, and Naphthalen-1-amine coupling, again diazo, in alkaline conditions and 6-Amino-4-hydroxynaphthalene-2-sulfonic acid coupling, product to diazo, and Benzene-1,3-diamine coupling.
Properties and Applications: green light grey. Soluble in water for green light black. The strong sulfuric acid for blue-ray green, red after dilute black precipitation. The dye solution to join strong hydrochloric acid have green light black precipitation; Add thick sodium hydroxide solution have blue-ray black precipitation.
List of Suppliers:
Direct Fast Grey MG( Industria Chimica Dott )