3626-28-6 Usage
Description
Disodium 4-amino-5-hydroxy-3-[[4'-[(4-hydroxyphenyl)azo][1,1'-biphenyl]-4-yl]azo]-6-(phenylazo)naphthalene-2,7-disulphonate is a dark green solid or black powder that is soluble in water, producing a blue light green color. It is also soluble in soluble fiber elements and moderately soluble in ethanol and acetone, but insoluble in other organic solvents. In the dark, it turns blue-black in strong sulfuric acid and changes from brown to red in nitric acid. When added to a dye solution, it forms a gray light purple precipitate with strong hydrochloric acid and a dark blue purple precipitate with sodium hydroxide solution.
Uses
Used in Textile Industry:
Disodium 4-amino-5-hydroxy-3-[[4'-[(4-hydroxyphenyl)azo][1,1'-biphenyl]-4-yl]azo]-6-(phenylazo)naphthalene-2,7-disulphonate is used as a dye for cellulose fiber, silk, and polyamide fiber dyeing and printing. It is also suitable for leather and paper coloring.
Used in Leather Industry:
Disodium 4-amino-5-hydroxy-3-[[4'-[(4-hydroxyphenyl)azo][1,1'-biphenyl]-4-yl]azo]-6-(phenylazo)naphthalene-2,7-disulphonate is used for leather coloring.
Used in Paper Industry:
Disodium 4-amino-5-hydroxy-3-[[4'-[(4-hydroxyphenyl)azo][1,1'-biphenyl]-4-yl]azo]-6-(phenylazo)naphthalene-2,7-disulphonate is used for paper coloring.
Standard:
The standard for disodium 4-amino-5-hydroxy-3-[[4'-[(4-hydroxyphenyl)azo][1,1'-biphenyl]-4-yl]azo]-6-(phenylazo)naphthalene-2,7-disulphonate includes the following properties:
Acid Resistance: ISO 3-4
Alkali Resistance: ISO 1
Light Fastness: ISO 1-2
Soaping: ISO 2
Water Fading: AATCC 5
Stain Fading: AATCC 1
Stain: AATCC 3-4
Preparation
4-(4-Aminophenyl)benzenamine double nitriding, first in acid conditions and 4-Amino-5-hydroxynaphthalene-2,7-disulfonic acid?coupling, aniline diazo, in alkaline conditions and accidentally coupled nitrogen compounds, its product again with phenol coupling.
Reactivity Profile
disodium 4-amino-5-hydroxy-3-[[4'-[(4-hydroxyphenyl)azo][1,1'-biphenyl]-4-yl]azo]-6-(phenylazo)naphthalene-2,7-disulphonate is an azo compound. Azo, diazo, azido compounds can detonate. This applies in particular to organic azides that have been sensitized by the addition of metal salts or strong acids. Toxic gases are formed by mixing materials of this class with acids, aldehydes, amides, carbamates, cyanides, inorganic fluorides, halogenated organics, isocyanates, ketones, metals, nitrides, peroxides, phenols, epoxides, acyl halides, and strong oxidizing or reducing agents. Flammable gases are formed by mixing materials in this group with alkali metals. Explosive combination can occur with strong oxidizing agents, metal salts, peroxides, and sulfides.
Fire Hazard
Flash point data for disodium 4-amino-5-hydroxy-3-[[4'-[(4-hydroxyphenyl)azo][1,1'-biphenyl]-4-yl]azo]-6-(phenylazo)naphthalene-2,7-disulphonate are not available; however, disodium 4-amino-5-hydroxy-3-[[4'-[(4-hydroxyphenyl)azo][1,1'-biphenyl]-4-yl]azo]-6-(phenylazo)naphthalene-2,7-disulphonate is probably combustible.
Standard
Acid Resistance
Fading
Stain
ISO
3-4
AATCC
5
Check Digit Verification of cas no
The CAS Registry Mumber 3626-28-6 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 3,6,2 and 6 respectively; the second part has 2 digits, 2 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 3626-28:
(6*3)+(5*6)+(4*2)+(3*6)+(2*2)+(1*8)=86
86 % 10 = 6
So 3626-28-6 is a valid CAS Registry Number.
InChI:InChI=1/C34H25N7O8S2.2Na/c35-31-30-22(19-29(51(47,48)49)33(34(30)43)41-38-23-4-2-1-3-5-23)18-28(50(44,45)46)32(31)40-39-25-12-8-21(9-13-25)20-6-10-24(11-7-20)36-37-26-14-16-27(42)17-15-26;;/h1-19,36,38H,35H2,(H,44,45,46)(H,47,48,49);;/q;2*+1/p-2/b40-39+,41-33+;;
