Direct Dyes Direct Blue 75

• Colour: Blue
• Appearance: Powder
• Usage: Paper, Ink, Leather, Textile, Food, Plastic, Paint
• Application Material: Wool
• Name: Direct Blue 75
• Content: 100%
• Model NO.: 6428-60-0
• C.I.No.: Direct Blue 75
• Light Fastness: 2
• Washing Fatness: 3
• Rubbing Fastness: 4
• Transport Package: Bag
• Trademark: emperor
• Origin: China
• HS Code: 3204140000
• Production Capacity: 80000t/Y

Product Description

C.I.Direct Blue 75,
C.I.34220,
CAS 6428-60-0,
1055.91,C42H25N7Na4O13S4,Direct Blue 2GL,Direct Fast Blue 2GL

Molecular Formula:C₄₂H₂₅N₇Na₄O₁₃S₄

Molecular Weight: 1055.91

CAS Registry Number:6428-60-0

Manufacturing Methods :3-Aminobenzenesulfonic acid diazo, and 5-Aminonaphthalene-2-sulfonic acid coupling, its product to diazo, and 5-Aminonaphthalene-2-sulfonic acid coupling, again diazo, in alkaline conditions and 4-Hydroxy-7-(phenylamino)naphthalene-2-sulfonic acid coupling.

Properties and Applications: dark blue. Soluble in water for blue, insoluble in other organic solvents. In the dark for the strong sulfuric acid, diluted to red light purple red for brown. The dye solution to join strong hydrochloric acid for blue; Add thick sodium hydroxide solution for red light purple

C.I.Direct Blue 75,C.I.34220,CAS 6428-60-0,1055.91,C42H25N7Na4O13S4,Direct Blue 2GL,Direct Fast Blue 2GL

Molecular Formula:C₄₂H₂₅N₇Na₄O₁₃S₄

Molecular Weight: 1055.91

CAS Registry Number:6428-60-0

Manufacturing Methods :3-Aminobenzenesulfonic acid diazo, and 5-Aminonaphthalene-2-sulfonic acid coupling, its product to diazo, and 5-Aminonaphthalene-2-sulfonic acid coupling, again diazo, in alkaline conditions and 4-Hydroxy-7-(phenylamino)naphthalene-2-sulfonic acid coupling.

Properties and Applications: dark blue. Soluble in water for blue, insoluble in other organic solvents. In the dark for the strong sulfuric acid, diluted to red light purple red for brown. The dye solution to join strong hydrochloric acid for blue; Add thick sodium hydroxide solution for red light purple

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

 

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