Trisodium 3-[[1-hydroxy-6-[[[[5-hydroxy-6-(phenylazo)-7-sulphonato-2-naphthyl]amino]carbonyl]amino]-3-sulphonato-2-naphthyl]azo]benzoate is a red-brown powder that exhibits a red light orange to yellow light red color. It is soluble in water, with a solubility of 10 g/L at 80°C, and slightly soluble in ethanol, displaying a gold orange color. trisodium 3-[[1-hydroxy-6-[[[[5-hydroxy-6-(phenylazo)-7-sulphonato-2-naphthyl]amino]carbonyl]amino]-3-sulphonato-2-naphthyl]azo]benzoate reacts with strong sulfuric acid to produce a red product, which turns orange upon dilution and forms a red-orange precipitate. When the dye solution is mixed with a strong sodium hydroxide solution, it turns orange brown, and the addition of 10% sodium hydroxide solution results in a slightly darker color. trisodium 3-[[1-hydroxy-6-[[[[5-hydroxy-6-(phenylazo)-7-sulphonato-2-naphthyl]amino]carbonyl]amino]-3-sulphonato-2-naphthyl]azo]benzoate forms a red precipitate when mixed with strong hydrochloric acid, but there is no change when 10% sulfuric acid is added. It is relatively sensitive to light.

6420-40-2

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Basic information
1. Product Name: trisodium 3-[[1-hydroxy-6-[[[[5-hydroxy-6-(phenylazo)-7-sulphonato-2-naphthyl]amino]carbonyl]amino]-3-sulphonato-2-naphthyl]azo]benzoate
2. Synonyms: trisodium 3-[[1-hydroxy-6-[[[[5-hydroxy-6-(phenylazo)-7-sulphonato-2-naphthyl]amino]carbonyl]amino]-3-sulphonato-2-naphthyl]azo]benzoate;Benzoic acid, 3-[[1-hydroxy-6-[[[[5-hydroxy- 6-(phenylazo)-7-sulfo-2-naphthalenyl]amino]carbonyl ]amino]-3-sulfo-2-naphthalenyl]azo]-, trisodium salt;3-[[1-Hydroxy-6-[[[[5-hydroxy-6-(phenylazo)-7-sulfo-2-naphtyl]amino]carbonyl]amino]-3-sulfo-2-naphtyl]azo]benzoic acid trisodium salt;C.I.29155;Benzoic acid, 3-(2-(1-hydroxy-6-((((5-hydroxy-6-(2-phenyldiazenyl)-7-sulfo-2-naphthalenyl)amino)carbonyl)amino)-3-sulfo-2-naphthalenyl)diazenyl)-, sodium salt (1:3);Einecs 229-161-7;Trisodium 3-((1-hydroxy-6-((((5-hydroxy-6-(phenylazo)-7-sulphonato-2-naphthyl)amino)carbonyl)amino)-3-sulphonato-2-naphthyl)azo)benzoate
3. CAS NO:6420-40-2
4. Molecular Formula: C34H21N6Na3O11S2
5. Molecular Weight: 822.66345
6. EINECS: 229-161-7
7. Product Categories: Organics
8. Mol File: 6420-40-2.mol
Chemical Properties
1. Melting Point: N/A
2. Boiling Point: N/A
3. Flash Point: N/A
4. Appearance: /
5. Density: N/A
6. Refractive Index: N/A
7. Storage Temp.: N/A
8. Solubility: N/A
9. CAS DataBase Reference: trisodium 3-[[1-hydroxy-6-[[[[5-hydroxy-6-(phenylazo)-7-sulphonato-2-naphthyl]amino]carbonyl]amino]-3-sulphonato-2-naphthyl]azo]benzoate(CAS DataBase Reference)
10. NIST Chemistry Reference: trisodium 3-[[1-hydroxy-6-[[[[5-hydroxy-6-(phenylazo)-7-sulphonato-2-naphthyl]amino]carbonyl]amino]-3-sulphonato-2-naphthyl]azo]benzoate(6420-40-2)
11. EPA Substance Registry System: trisodium 3-[[1-hydroxy-6-[[[[5-hydroxy-6-(phenylazo)-7-sulphonato-2-naphthyl]amino]carbonyl]amino]-3-sulphonato-2-naphthyl]azo]benzoate(6420-40-2)
Safety Data
1. Hazard Codes: N/A
2. Statements: N/A
3. Safety Statements: N/A
4. WGK Germany:
5. RTECS:
6. HazardClass: N/A
7. PackingGroup: N/A
8. Hazardous Substances Data: 6420-40-2(Hazardous Substances Data)

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6420-40-2 Usage

Uses

Used in Textile Industry:
Trisodium 3-[[1-hydroxy-6-[[[[5-hydroxy-6-(phenylazo)-7-sulphonato-2-naphthyl]amino]carbonyl]amino]-3-sulphonato-2-naphthyl]azo]benzoate is used as a dye for cellulose fiber, silk, wool, and polyamide fiber dyeing, as well as for fiber fabric printing. It is also suitable for leather coloring due to its good exhaust dyeing properties.
Standard:
trisodium 3-[[1-hydroxy-6-[[[[5-hydroxy-6-(phenylazo)-7-sulphonato-2-naphthyl]amino]carbonyl]amino]-3-sulphonato-2-naphthyl]azo]benzoate has the following standards for various properties:
Acid Resistance: ISO 5, AATCC 4
Alkali Resistance: ISO 4, AATCC 5
Light Fastness: ISO 2-3, AATCC 2-3
Soaping: ISO 1-2, AATCC 1-2
Water Fading: ISO 1-2, AATCC 1-2
Stain Fading: Not specified
Stain: Not specified

Preparation

aniline diazo, coupled with N,N’-bis(4-hydroxy-2-sulfonaphthalene-7-yl)urea, 3-Aminobenzoic acid diazo, and the generation of single accidentally coupled nitrogen compounds.

Standard

Acid Resistance

Fading

Stain

ISO

AATCC

Check Digit Verification of cas no

The CAS Registry Mumber 6420-40-2 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 6,4,2 and 0 respectively; the second part has 2 digits, 4 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 6420-40:
(6*6)+(5*4)+(4*2)+(3*0)+(2*4)+(1*0)=72
72 % 10 = 2
So 6420-40-2 is a valid CAS Registry Number.

InChI:InChI=1/C34H24N6O11S2.2Na/c41-31-25-11-9-22(14-19(25)16-27(52(46,47)48)29(31)39-37-21-6-2-1-3-7-21)35-34(45)36-23-10-12-26-20(15-23)17-28(53(49,50)51)30(32(26)42)40-38-24-8-4-5-18(13-24)33(43)44;;/h1-17,37-38H,(H,43,44)(H2,35,36,45)(H,46,47,48)(H,49,50,51);;/q;2*+1/p-2/b39-29+,40-30+;;

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