7-Amino-3-[[4'-[[6-amino-5-[(4-aminophenyl)azo]-1-hydroxy-3-sodiosulfo-2-naphthalenyl]azo][1,1'-biphenyl]-4-yl]azo]-8-[(4-amino-2-sodiosulfophenyl)azo]-4-hydroxynaphthalene-2-sulfonic acid sodium salt is a complex organic compound with a unique chemical structure. It is characterized by its navy blue color and is soluble in water, forming a dark red sauce. It is also slightly soluble in alcohol. When exposed to strong sulfuric acid in the dark, it turns red, and when diluted, it forms a sauce. The dye solution turns dark red upon the addition of strong hydrochloric acid, with precipitation occurring. When a thick dark red sauce of sodium hydroxide solution is added, precipitation also occurs.

6661-39-8

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Basic information
1. Product Name: 7-Amino-3-[[4'-[[6-amino-5-[(4-aminophenyl)azo]-1-hydroxy-3-sodiosulfo-2-naphthalenyl]azo][1,1'-biphenyl]-4-yl]azo]-8-[(4-amino-2-sodiosulfophenyl)azo]-4-hydroxynaphthalene-2-sulfonic acid sodium salt
2. Synonyms: 7-Amino-3-[[4'-[[6-amino-5-[(4-aminophenyl)azo]-1-hydroxy-3-sodiosulfo-2-naphthalenyl]azo][1,1'-biphenyl]-4-yl]azo]-8-[(4-amino-2-sodiosulfophenyl)azo]-4-hydroxynaphthalene-2-sulfonic acid sodium salt;C.I.35085;C.I.Direct Blue 131;Diazo Navy Blue BP;2-Naphthalenesulfonic acid, 7-amino-3-((4'-((6-amino-5-((4-aminophenyl)azo)-1-hydroxy-3-sulfo-2-naphthalenyl)azo)(1,1'-biphenyl)-4-yl)azo)-8-((4-amino-2-sulfophenyl)azo)-4-hydroxy-, trisodium salt
3. CAS NO:6661-39-8
4. Molecular Formula: C44H34N12O11S3.3Na
5. Molecular Weight: 1072
6. EINECS: N/A
7. Product Categories: N/A
8. Mol File: 6661-39-8.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: 7-Amino-3-[[4'-[[6-amino-5-[(4-aminophenyl)azo]-1-hydroxy-3-sodiosulfo-2-naphthalenyl]azo][1,1'-biphenyl]-4-yl]azo]-8-[(4-amino-2-sodiosulfophenyl)azo]-4-hydroxynaphthalene-2-sulfonic acid sodium salt(CAS DataBase Reference)
10. NIST Chemistry Reference: 7-Amino-3-[[4'-[[6-amino-5-[(4-aminophenyl)azo]-1-hydroxy-3-sodiosulfo-2-naphthalenyl]azo][1,1'-biphenyl]-4-yl]azo]-8-[(4-amino-2-sodiosulfophenyl)azo]-4-hydroxynaphthalene-2-sulfonic acid sodium salt(6661-39-8)
11. EPA Substance Registry System: 7-Amino-3-[[4'-[[6-amino-5-[(4-aminophenyl)azo]-1-hydroxy-3-sodiosulfo-2-naphthalenyl]azo][1,1'-biphenyl]-4-yl]azo]-8-[(4-amino-2-sodiosulfophenyl)azo]-4-hydroxynaphthalene-2-sulfonic acid sodium salt(6661-39-8)
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: 6661-39-8(Hazardous Substances Data)

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6661-39-8 Usage

Uses

Used in Dye Industry:
7-Amino-3-[[4'-[[6-amino-5-[(4-aminophenyl)azo]-1-hydroxy-3-sodiosulfo-2-naphthalenyl]azo][1,1'-biphenyl]-4-yl]azo]-8-[(4-amino-2-sodiosulfophenyl)azo]-4-hydroxynaphthalene-2-sulfonic acid sodium salt is used as a dye in the textile industry for coloring fabrics. Its unique chemical structure allows it to produce a vibrant navy blue color, making it a popular choice for various applications.
Used in Analytical Chemistry:
7-Amino-3-[[4'-[[6-amino-5-[(4-aminophenyl)azo]-1-hydroxy-3-sodiosulfo-2-naphthalenyl]azo][1,1'-biphenyl]-4-yl]azo]-8-[(4-amino-2-sodiosulfophenyl)azo]-4-hydroxynaphthalene-2-sulfonic acid sodium salt can also be used in analytical chemistry as a reagent for the detection and quantification of various substances. Its unique chemical properties make it suitable for use in colorimetric assays and other analytical techniques.
Standard:
7-Amino-3-[[4'-[[6-amino-5-[(4-aminophenyl)azo]-1-hydroxy-3-sodiosulfo-2-naphthalenyl]azo][1,1'-biphenyl]-4-yl]azo]-8-[(4-amino-2-sodiosulfophenyl)azo]-4-hydroxynaphthalene-2-sulfonic acid sodium salt meets certain standards in terms of its properties, such as acid resistance, alkali resistance, light fastness, soaping, water fading, and stain fading. These properties are essential for its performance in various applications, ensuring that it maintains its color and stability under different conditions.
Acid Resistance: 4
Alkali Resistance: 4
Light Fastness: 4
Soaping: 2-3
Water Fading: 2

Preparation

2-Amino-5-nitrobenzenesulfonic acid diazo, in acid conditions and 7-Amino-4-hydroxynaphthalene-2-sulfonic acid coupling, 4-(4-Aminophenyl)benzenamine?double nitriding, first alkaline conditions and formation of accidentally coupled nitrogen compounds, and then in alkaline conditions and 4-Nitrobenzenamine diazo, in acid conditions and 7-Amino-4-hydroxynaphthalene-2-sulfonic acid and the product of three to three, and then will the nitro reduction.

Standard

Acid Resistance

Fading

Stain

ISO

Check Digit Verification of cas no

The CAS Registry Mumber 6661-39-8 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 6,6,6 and 1 respectively; the second part has 2 digits, 3 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 6661-39:
(6*6)+(5*6)+(4*6)+(3*1)+(2*3)+(1*9)=108
108 % 10 = 8
So 6661-39-8 is a valid CAS Registry Number.

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