4-Amino-3-[[4'-[(1-hydroxy-4-sulfo-2-naphtyl)azo]-3,3'-dimethyl-1,1'-biphenyl-4-yl]azo]-1-naphthalenesulfonic acid disodium salt is a complex organic compound that is characterized by its dark red to light purple color. It is soluble in water, producing a red sauce, and also soluble in ethanol, resulting in a product with a red hue. 4-Amino-3-[[4'-[(1-hydroxy-4-sulfo-2-naphtyl)azo]-3,3'-dimethyl-1,1'-biphenyl-4-yl]azo]-1-naphthalenesulfonic acid disodium salt exhibits unique chemical properties, such as changing color from blue to red upon dilution with strong sulfuric acid. When mixed with a dye solution and strong hydrochloric acid, it turns hidden cyan and forms a precipitate. The addition of a thick sodium hydroxide solution results in a red wine color.

6470-45-7

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Basic information
1. Product Name: 4-Amino-3-[[4'-[(1-hydroxy-4-sulfo-2-naphtyl)azo]-3,3'-dimethyl-1,1'-biphenyl-4-yl]azo]-1-naphthalenesulfonic acid disodium salt
2. Synonyms: 4-Amino-3-[[4'-[(1-hydroxy-4-sulfo-2-naphtyl)azo]-3,3'-dimethyl-1,1'-biphenyl-4-yl]azo]-1-naphthalenesulfonic acid disodium salt;C.I.23520;C.I.Direct Violet 21;Congo Corinth B
3. CAS NO:6470-45-7
4. Molecular Formula: C34H27 N5 O7 S2 . 2 Na
5. Molecular Weight: 0
6. EINECS: N/A
7. Product Categories: N/A
8. Mol File: 6470-45-7.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: 4-Amino-3-[[4'-[(1-hydroxy-4-sulfo-2-naphtyl)azo]-3,3'-dimethyl-1,1'-biphenyl-4-yl]azo]-1-naphthalenesulfonic acid disodium salt(CAS DataBase Reference)
10. NIST Chemistry Reference: 4-Amino-3-[[4'-[(1-hydroxy-4-sulfo-2-naphtyl)azo]-3,3'-dimethyl-1,1'-biphenyl-4-yl]azo]-1-naphthalenesulfonic acid disodium salt(6470-45-7)
11. EPA Substance Registry System: 4-Amino-3-[[4'-[(1-hydroxy-4-sulfo-2-naphtyl)azo]-3,3'-dimethyl-1,1'-biphenyl-4-yl]azo]-1-naphthalenesulfonic acid disodium salt(6470-45-7)
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: 6470-45-7(Hazardous Substances Data)

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6470-45-7 Usage

Uses

Used in Dye Industry:
4-Amino-3-[[4'-[(1-hydroxy-4-sulfo-2-naphtyl)azo]-3,3'-dimethyl-1,1'-biphenyl-4-yl]azo]-1-naphthalenesulfonic acid disodium salt is used as a dye for various applications due to its color-changing properties and solubility in water and ethanol. Its ability to produce different shades of red and blue makes it a versatile choice for creating a wide range of colors in the dye industry.
Used in Textile Industry:
In the textile industry, 4-Amino-3-[[4'-[(1-hydroxy-4-sulfo-2-naphtyl)azo]-3,3'-dimethyl-1,1'-biphenyl-4-yl]azo]-1-naphthalenesulfonic acid disodium salt is used as a colorant for fabrics. Its light fastness, acid resistance, and alkali resistance make it suitable for染色 (dyeing) and 耐洗性 (resistance to washing), ensuring that the colors remain vibrant and resistant to fading even after multiple washes.
Used in Cosmetic Industry:
4-Amino-3-[[4'-[(1-hydroxy-4-sulfo-2-naphtyl)azo]-3,3'-dimethyl-1,1'-biphenyl-4-yl]azo]-1-naphthalenesulfonic acid disodium salt is also utilized in the cosmetic industry for coloring products such as lipsticks and blushes. Its ability to produce a range of red hues and its compatibility with various solvents make it an ideal choice for creating visually appealing and long-lasting cosmetic products.
Standard:
The standard for 4-Amino-3-[[4'-[(1-hydroxy-4-sulfo-2-naphtyl)azo]-3,3'-dimethyl-1,1'-biphenyl-4-yl]azo]-1-naphthalenesulfonic acid disodium salt includes the following properties:
Acid Resistance: Rated 1, indicating high resistance to acids.
Alkali Resistance: Rated 3, showing moderate resistance to alkalis.
Light Fastness: Rated 2, meaning the color is relatively stable under light exposure.
Soaping: Rated 1-2, suggesting that the color may slightly fade or stain when soap is used.
These properties make 4-Amino-3-[[4'-[(1-hydroxy-4-sulfo-2-naphtyl)azo]-3,3'-dimethyl-1,1'-biphenyl-4-yl]azo]-1-naphthalenesulfonic acid disodium salt a suitable choice for various applications in different industries, where color stability and resistance to environmental factors are important.

Preparation

3,3′-Dimethylbenzidine double nitriding, first with 4-Aminonaphthalene-1-sulfonic acid matches, again with 4-Hydroxynaphthalene-1-sulfonic acid coupling. In some brands are available in 6-Aminonaphthalene-1-sulfonic acid instead of 4-Hydroxynaphthalene-1-sulfonic acid.

Standard

Acid Resistance

Fading

Stain

ISO

Check Digit Verification of cas no

The CAS Registry Mumber 6470-45-7 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 6,4,7 and 0 respectively; the second part has 2 digits, 4 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 6470-45:
(6*6)+(5*4)+(4*7)+(3*0)+(2*4)+(1*5)=97
97 % 10 = 7
So 6470-45-7 is a valid CAS Registry Number.

InChI:InChI=1/C34H27N5O7S2.2Na/c1-19-15-21(11-13-27(19)36-38-29-17-31(47(41,42)43)23-7-3-5-9-25(23)33(29)35)22-12-14-28(20(2)16-22)37-39-30-18-32(48(44,45)46)24-8-4-6-10-26(24)34(30)40;;/h3-18,40H,35H2,1-2H3,(H,41,42,43)(H,44,45,46);;/q;2*+1/p-2

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