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HomeProduct name listDirect Black 19

Direct Black 19

  • CAS NO.:6428-31-5
  • Empirical Formula: C34H30N13NaO7S2
  • Molecular Weight: 819.81
  • MDL number: MFCD00137529
  • EINECS: 229-208-1
  • SAFETY DATA SHEET (SDS)
  • Update Date: 2023-05-04 15:16:48
Direct Black  19 Structural

What is Direct Black 19?

Preparation

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.

Flammability and Explosibility

Non flammable

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.

Standard Acid Resistance Alkali Resistance Light Fastness Soaping Water
Fading Stain Fading Stain
ISO 4 3 3-4 2 2
AATCC 4-5 3 3 2-3 2

Properties of Direct Black 19

Boiling point: 1379℃[at 101 325 Pa]
Density  1.49[at 20℃]
vapor pressure  0Pa at 25℃
Water Solubility  22.67g/L at 20℃
CAS DataBase Reference 6428-31-5(CAS DataBase Reference)
EPA Substance Registry System C.I. Direct Black 19, disodium salt (6428-31-5)

Safety information for Direct Black 19

Computed Descriptors for Direct Black 19

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