Direct Green 1

Product Name:Direct Green 1 100%
Molecular Structure: trisazo class

Molecular Formula:C₃₄H₂₃N₇Na₂O₈S₂
Molecular Weight: 767.70
CAS Registry Number:3626-28-6
Manufacturing Methods : 4-(4-Aminophenyl)benzenamine double nitriding, first in acid conditions and 4-Amino-5-hydroxynaphthalene-2,7-disulfonic acid coupling, aniline diazo, in alkaline conditions and accidentally coupled nitrogen compounds, its product again with phenol coupling.
Properties and Applications: Dark green. Soluble in water for blue light green, soluble in soluble fiber element, and adequate soluble in ethanol and acetone, insoluble in other organic solvents. In the dark for the strong sulfuric acid to blue-black, after dilute black precipitation; In nitric acid partly dissolved, frombrown into a red. The dye solution to join strong hydrochloric acid have Gray light purple precipitation; Add thick dark blue purple sodium hydroxide solution precipitation. Suitable for cellulose fiber, silk, polyamide fiber dyeing and printing, also suitable for leather and paper color.
Counter product:Rifa Direct Dark Green 2B;Direct Dark Green B
Use: for cellulose fiber, silk, polyamide fiber dyeing and printing, also suitable for leather and paper color.
Packing: 25KG Carton