dye|World dye variety

Name:C.I.Direct Blue 74,C.I.34146

Molecular Structure: trisazo class

C.I.Direct Blue 74,C.I.34146,CAS 33540-94-2,979.81,C36H21N7Na4O13S4,Direct Fast Blue L2RN,Direct Blue RL

Molecular Formula:C₃₆H₂₁N₇Na₄O₁₃S₄

Molecular Weight: 979.81

CAS Registry Number:33540-94-2

Manufacturing Methods : 3-Aminobenzenesulfonic acid diazo, and 5-Aminonaphthalene-2-sulfonic acid and 8-Aminonaphthalene-2-sulfonic acid first coupling, its product to diazo, and 5-Aminonaphthalene-2-sulfonic acid and 8-Aminonaphthalene-2-sulfonic acid second coupling, again diazo, in alkaline conditions and 7-Amino-4-hydroxynaphthalene-2-sulfonic acid third coupling.

Properties and Applications: dark blue. Black powder. Soluble in water for red light blue. The strong sulfuric acid for Gray light blue, blue for red after diluted. The dye solution with 10% after sulfuric acid into dark purple; Add 30% sodium hydroxide solution into the red. Water-soluble general, more sensitive to hard. Exhaust the dye sex good, excellent discharge. Copper ions in dyeing, iron ion a slight change color. Used for cotton, viscose and silk dyeing and printing, also can be used for cotton/rayon blended fabric dyeing and printing, also used for paper color.

List of Suppliers:

Direct Fast Blue L2RN ( Sintofarm SA )

Formo Direct Blue RL ( Formokem (India) Corp. )

Helion Blue RL (Boruta – Kolor)

Sandal Direct Blue RL( Sandal Dyestuff Industries (Pvt) Ltd )