3-[[4-[[6-[(4-Aminobenzoyl)amino]-1-hydroxy-3-sulfo-2-naphtyl]azo]-3,5-dimethylphenyl]azo]-1,5-naphthalenedisulfonic acid trisodium salt is a complex organic compound with a unique chemical structure. It is characterized by its red color, which is soluble in water for red jade and in ethanol for product red. In strong sulfuric acid, it appears as dark blue, and when diluted, it turns red. The dye solution with strong hydrochloric acid forms a purplish red precipitate, and when thick sodium hydroxide solution is added, the color changes to a purplish red sauce.

6421-66-5

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Basic information
1. Product Name: 3-[[4-[[6-[(4-Aminobenzoyl)amino]-1-hydroxy-3-sulfo-2-naphtyl]azo]-3,5-dimethylphenyl]azo]-1,5-naphthalenedisulfonic acid trisodium salt
2. Synonyms: 3-[[4-[[6-[(4-Aminobenzoyl)amino]-1-hydroxy-3-sulfo-2-naphtyl]azo]-3,5-dimethylphenyl]azo]-1,5-naphthalenedisulfonic acid trisodium salt;C.I.28260;C.I.Direct Red 150
3. CAS NO:6421-66-5
4. Molecular Formula: C35H28 N6 O11 S3 . 3 Na
5. Molecular Weight: 0
6. EINECS: N/A
7. Product Categories: N/A
8. Mol File: 6421-66-5.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: 3-[[4-[[6-[(4-Aminobenzoyl)amino]-1-hydroxy-3-sulfo-2-naphtyl]azo]-3,5-dimethylphenyl]azo]-1,5-naphthalenedisulfonic acid trisodium salt(CAS DataBase Reference)
10. NIST Chemistry Reference: 3-[[4-[[6-[(4-Aminobenzoyl)amino]-1-hydroxy-3-sulfo-2-naphtyl]azo]-3,5-dimethylphenyl]azo]-1,5-naphthalenedisulfonic acid trisodium salt(6421-66-5)
11. EPA Substance Registry System: 3-[[4-[[6-[(4-Aminobenzoyl)amino]-1-hydroxy-3-sulfo-2-naphtyl]azo]-3,5-dimethylphenyl]azo]-1,5-naphthalenedisulfonic acid trisodium salt(6421-66-5)
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: 6421-66-5(Hazardous Substances Data)

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6421-66-5 Usage

Uses

Used in Dye Industry:
3-[[4-[[6-[(4-Aminobenzoyl)amino]-1-hydroxy-3-sulfo-2-naphtyl]azo]-3,5-dimethylphenyl]azo]-1,5-naphthalenedisulfonic acid trisodium salt is used as a dye for various applications due to its vibrant red color and solubility in water and ethanol. Its ability to change color under different chemical conditions makes it a versatile choice for creating a range of hues and shades.
Used in Textile Industry:
In the textile industry, 3-[[4-[[6-[(4-Aminobenzoyl)amino]-1-hydroxy-3-sulfo-2-naphtyl]azo]-3,5-dimethylphenyl]azo]-1,5-naphthalenedisulfonic acid trisodium salt is used as a colorant for fabrics. Its light fastness, acid resistance, and alkali resistance make it suitable for dyeing and printing processes, ensuring that the colors remain vibrant and resistant to fading and staining.
Used in Cosmetics Industry:
3-[[4-[[6-[(4-Aminobenzoyl)amino]-1-hydroxy-3-sulfo-2-naphtyl]azo]-3,5-dimethylphenyl]azo]-1,5-naphthalenedisulfonic acid trisodium salt can be used as a color additive in the cosmetics industry, particularly for products that require a red hue. Its compatibility with various solvents and its ability to maintain color stability under different pH conditions make it an ideal choice for this application.
Used in Printing Industry:
In the printing industry, 3-[[4-[[6-[(4-Aminobenzoyl)amino]-1-hydroxy-3-sulfo-2-naphtyl]azo]-3,5-dimethylphenyl]azo]-1,5-naphthalenedisulfonic acid trisodium salt is used as an ink additive for its red color. Its light fastness and resistance to fading and staining make it suitable for various printing applications, ensuring that the printed materials maintain their color quality over time.

Preparation

3-Aminonaphthalene-1,5-disulfonic acid diazo, and 2,6-Dimethylbenzenamine coupling, its product to diazo, and 7-(4-Aminobenzamido)-4-hydroxynaphthalene-2-sulfonic acid coupling.

Standard

Acid Resistance

Fading

Stain

ISO

Check Digit Verification of cas no

The CAS Registry Mumber 6421-66-5 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 1 respectively; the second part has 2 digits, 6 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 6421-66:
(6*6)+(5*4)+(4*2)+(3*1)+(2*6)+(1*6)=85
85 % 10 = 5
So 6421-66-5 is a valid CAS Registry Number.

InChI:InChI=1/C35H28N6O11S3.3Na/c1-18-12-24(38-39-25-16-28-27(30(17-25)54(47,48)49)4-3-5-29(28)53(44,45)46)13-19(2)32(18)40-41-33-31(55(50,51)52)15-21-14-23(10-11-26(21)34(33)42)37-35(43)20-6-8-22(36)9-7-20;;;/h3-17,42H,36H2,1-2H3,(H,37,43)(H,44,45,46)(H,47,48,49)(H,50,51,52);;;/q;3*+1/p-3

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