Direct Blue 71

Direct Blue 71 Basic information

Product Name:	Direct Blue 71
Synonyms:	C.1.DirectBlue71(34140);C.I.Directblue71;DiazolLightBlueR;DirectdeepblueL-3RB;DirectfastblueB2RL;DurazolBlue2R;SiriusSupraBlueBRR;SumilightSupraBlueBRR
CAS:	4399-55-7
MF:	C40H28N7NaO13S4
MW:	965.93
EINECS:	224-531-4
Product Categories:	Organics;Dyes and Pigments;D;Stains and Dyes;Stains&Dyes, A to
Mol File:	4399-55-7.mol

Direct Blue 71 Chemical Properties

storage temp.	Refrigerator
solubility	DMSO (Slightly, Sonicated), Methanol (Slightly, Sonicated)
form	Powder
Colour Index	34140
color	Black
CAS DataBase Reference	4399-55-7(CAS DataBase Reference)
EPA Substance Registry System	C.I. Direct Blue 71 (4399-55-7)

Safety Information

Safety Statements	24/25
WGK Germany	3
HS Code	32041400

MSDS Information

Provider	Language
C.I. 34140	English
ACROS	English
SigmaAldrich	English

Direct Blue 71 Usage And Synthesis

Chemical Properties

black powder

Uses

Direct blue 71 (CAS# 4399-55-7) is an organic triazo dye and a water-soluble pollutant. The decolourization of aqueous solutions of direct blue 71 has been achieved using a variety of methods, such as the use of Au-Nx-TiO2 nanospheres to achieve its photocatalytic degradation. Dyes and metabolites.

Preparation

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.

Properties and Applications

dark blue. Blue gray powder. Soluble in water for blue, solubility of 10 g/L (60 ℃), 20 g/L (97 ℃), slightly soluble in soluble fiber element, soluble in ethanol, insoluble in other organic solvents. The strong sulfuric acid for blue to to black, red after diluted purple precipitation. Dye with strong hydrochloric acid solution for blue precipitation; Add thick sodium hydroxide solution for red light purple, have precipitation. Cellulose fiber of dyeing, dye devoured the gender is good, the temperature in the 80-100 ℃, affinity is the largest. Discharge sex is very good. In dye bath of copper ions in tiny change color (4 ~ 5 level), meet iron ion colored light basically unchanged (level 5). SDC classification for a class B. Cotton neutral white was a category 4, viscose neutral white for 4 ~ 5 level, cotton and viscose alkaline white are 5 levels. 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.

Standard	Acid Resistance	Alkali Resistance	Light Fastness	Soaping		Water
Standard	Acid Resistance	Alkali Resistance	Light Fastness	Fading	Stain	Fading	Stain
ISO	4	4-5	5	2		2
AATCC	2	4	4-5	1-2		2

Direct Blue 71 Preparation Products And Raw materials

Raw materials

Sodium hydroxide-->Urea-->Sodium acetate-->Butyric Acid-->1-Naphthylamine-->2-Amino-4,8-naphthalenedisulfonic acid-->1-Naphthylamine-7-sulfonic acid-->1,5-Naphthalenedisulfonic acid-->indust rial soap-->1-Naphthylamine-7-sulfonic acid-->2-Amino-4,8-naphthalenedisulfonic acid-->J acid-->1-Naphthylamine

CI NO 22610 1,5-NAPHTHALENEDISULFONIC ACID DISODIUM SALT, DIHYDRATE, 98 1,4-DIAMINONAPHTHALENE ALTRENOGEST B2R DIRECT BLUE B2R 6-Aminocaproic acid Glycine 1-NAPHTHALENETHIOL 1,5-Naphthalenedisulfonic acid tetrahydrate 1,1'-AZONAPHTHALENE Direct Blue 71 Direct Tris(hydroxymethyl)aminomethane AMINO ACIDS 2-Chloro-5-hydroxypyridine 3-Aminophenol CHLOROPHOSPHONAZO III Disodium 1,5-naphthalenedisulfonate

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Direct Blue 71

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