dye|World dye variety

Name:C.I.Direct Black 48,C.I.34000

Molecular Structure: trisazo class

C.I.Direct Black 48,C.I.34000,CAS 6771-92-2,720.62,C33H22N8Na2O7S,Direct Fast Grey MG

Molecular Formula:C₃₃H₂₂N₈Na₂O₇S

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  )