Direct Black 19

Product Name:Direct Black 19 100%
Molecular Structure: Multi-azo class

Molecular Formula:C₃₄H₂₇N₁₃Na₂O₇S₂
Molecular Weight: 839.77
CAS Registry Number:6428-31-5
Manufacturing Methods : 4-Nitrobenzenamine (2 Moore) diazo, one in acid conditions, a in alkaline conditions and 4-Amino-5-hydroxynaphthalene-2,7-disulfonic acid (1 Moore) coupling, and then will the nitro reduction, diazotization, again with Benzene-1,3-diamine (2 Moore) coupled.
Properties and Applications: green and black. Black powder. Soluble in water for green light black, solubility of 100 g/L (80 ℃), slightly soluble in ethanol and acetone. The strong sulfuric acid in the green light for black, dilute red after black precipitation; In nitric acid to dark brown. Dyes and microstructure of sulfuric acid solution 10% red; Add thick sodium hydroxide solution for green light blue. Copper ions in dyeing color shade the green, iron ion a slight change in color. Used in viscose of dyeing and printing. In the cotton knitwear, blankets, flannelette, silk, viscose, silk that the fabric, wool/viscose fiber blend fabrics can be used. Can also be used in leather, paper and electrochemical aluminum color.
Counter product:Levacell Black PN;Pergasol Black G;Solar Black G;Sirius Black G;Baycolor Black B
Use: for wool/viscose fiber blend fabrics can be used. Can also be used in leather, paper and electrochemical aluminum color.
Packing: 25KG Carton