Direct Red 79

Product Name:Direct Red 79 170%
Molecular Structure: Double azo class

Molecular Formula:C₃₇H₂₈N₆Na₄O₁₇S₄
Molecular Weight: 1048.87
CAS Registry Number:1937-34-4
Manufacturing Methods : 4-Amino-5-(tosyloxy)naphthalene-2,7-disulfonic acid diazo, and 2-Amino-4-methylanisole coupling, and then hydrolysis p-toluene sulfonic acid ester base, and light gasification.
Properties and Applications: colourful red blue light. Soluble in water for red to blue light red, solubility 15 g/L (60 ℃) / 24 g/L (97 ℃), slightly soluble in ethanol and soluble fiber element, insoluble in other organic solvents. The strong sulfuric acid in blue, diluted for purple; In nitric acid solution for blue-black, then into blue, again into purple. The dye solution with strong hydrochloric acid have blue light green precipitation; Add thick sodium hydroxide solution for yellow orange. Water-soluble is good, hard to sensitive. For colourful red light blue light. In dye bath of copper, iron ions in a slight change color. SDC classification for a class B, neutral white is very good, alkaline white.
Counter product:Intralite Red 6 BLL;Sirius Supra Red 4BL;Direct Red 6BL
Use:for Used for dyeing cotton and viscose, also can be used for paper color.
Packing: 25KG Carton

Product Name:Direct Red 243 100%
Molecular Structure: Double azo class

Molecular Formula:C₃₈H₂₈N₁₀Na₄O₁₇S₄
Molecular Weight: 1116.91
CAS Registry Number:86543-85-3
Manufacturing Methods : 3-Amino-4-hydroxybenzenesulfonic aciddiazo, in alkaline conditions and 7-Amino-4-hydroxynaphthalene-2-sulfonic acidcoupling, its products and 2,4,6-Trichloro-1,3,5-triazine condensation, 2-Amino-5-methoxybenzenesulfonic acid diazo, and 7-Amino-4-hydroxynaphthalene-2-sulfonic acid coupling, again with the condensation products condensation, then with 2-Aminoethanol condensation
Properties and Applications: blue-ray red. Used for dyeing and printing of cellulose fiber.
Counter product:Direct Red BWS;Benzanil Red BWS;Everdirect Supra Red BWS
Use:for dyeing and printing of cellulose fiber.
Packing: 25KG Carton