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Direct Fast Blue B2rl, Direct Blue 71

Min. Order / Reference FOB Price
300 kg	US $2.00/ kg

Local Area:	Zibo, Shandong, China
R&D Capacity:	OEM, ODM, Other
Payment Terms:	LC, T/T, D/P

CAS No.:	4399-55-7
Colour:	Blue
Appearance:	Powder

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Product Description

Name:C.I.Direct Blue 71,C.I.34140Molecular Structure: trisazo classC.I.Direct Blue 71,C.I.34140,CAS 4399-55-7,1029.87,C40H23N7Na4O13S4,Direct Fast Blue 2RL,Direct Fast Blue B2R,Direct Fast Blue B2RL,Direct Navy BlueL-3RB,Sirius Blue S-BRR,Solophenyl Blue GLMolecular Formula:C40H23N7Na4O13S4Molecular Weight: 1029.87CAS Registry Number:4399-55-7Manufacturing Methods : 3-Aminonaphthalene-1,5-disulfonic acid diazo, and Naphthalen-1-amine first coupling, its product to diazo, and 8-Aminonaphthalene-2-sulfonic acid second coupling, again diazo, in alkaline conditions and 7-Amino-4-hydroxynaphthalene-2-sulfonic acid third coupling.Widely used in viscose fiber dyeing, also used in viscose/PVA blends, cotton, and the carpet of dyeing and printing. Also used in leather, paper, soap, cheese, protein and formaldehyde resin color.
StandardAcid ResistanceAlkali ResistanceLight FastnessSoapingWaterFadingStainFadingStainISO44-5522AATCC244-51-22