Trisodium 4-hydroxy-3-[[4'-[(1-hydroxy-4-sulphonato-2-naphthyl)azo]-3,3'-dimethoxy[1,1'-biphenyl]-4-yl]azo]naphthalene-2,7-disulphonate is a complex organic compound that serves as a dye. It is characterized by its ability to produce a deep purple color when dissolved in water and ethanol. This dye also exhibits a blue color in the presence of strong sulfuric acid and a purple hue when diluted. Additionally, it shows a change in color to red when mixed with a concentrated solution of sodium hydroxide.

6473-33-2

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Basic information
1. Product Name: trisodium 4-hydroxy-3-[[4'-[(1-hydroxy-4-sulphonato-2-naphthyl)azo]-3,3'-dimethoxy[1,1'-biphenyl]-4-yl]azo]naphthalene-2,7-disulphonate
2. Synonyms: trisodium 4-hydroxy-3-[[4'-[(1-hydroxy-4-sulphonato-2-naphthyl)azo]-3,3'-dimethoxy[1,1'-biphenyl]-4-yl]azo]naphthalene-2,7-disulphonate;4-Hydroxy-3-[[4'-[(1-hydroxy-4-sulfo-2-naphtyl)azo]-3,3'-dimethoxy-1,1'-biphenyl-4-yl]azo]-2,7-naphthalenedisulfonic acid trisodium salt;C.I.24145;C.I.Direct Blue 35
3. CAS NO:6473-33-2
4. Molecular Formula: C34H23N4Na3O13S3
5. Molecular Weight: 860.72973
6. EINECS: 229-328-4
7. Product Categories: N/A
8. Mol File: 6473-33-2.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 4-hydroxy-3-[[4'-[(1-hydroxy-4-sulphonato-2-naphthyl)azo]-3,3'-dimethoxy[1,1'-biphenyl]-4-yl]azo]naphthalene-2,7-disulphonate(CAS DataBase Reference)
10. NIST Chemistry Reference: trisodium 4-hydroxy-3-[[4'-[(1-hydroxy-4-sulphonato-2-naphthyl)azo]-3,3'-dimethoxy[1,1'-biphenyl]-4-yl]azo]naphthalene-2,7-disulphonate(6473-33-2)
11. EPA Substance Registry System: trisodium 4-hydroxy-3-[[4'-[(1-hydroxy-4-sulphonato-2-naphthyl)azo]-3,3'-dimethoxy[1,1'-biphenyl]-4-yl]azo]naphthalene-2,7-disulphonate(6473-33-2)
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: 6473-33-2(Hazardous Substances Data)

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6473-33-2 Usage

Uses

Used in Textile Industry:
Trisodium 4-hydroxy-3-[[4'-[(1-hydroxy-4-sulphonato-2-naphthyl)azo]-3,3'-dimethoxy[1,1'-biphenyl]-4-yl]azo]naphthalene-2,7-disulphonate is used as a dye in the textile industry for coloring fabrics. Its ability to produce a deep purple color makes it suitable for various applications, such as clothing, upholstery, and decorative items.
Used in Analytical Chemistry:
This dye can be used in analytical chemistry as an indicator or reagent due to its color-changing properties in the presence of different chemical environments, such as strong acids and bases.
Used in Art and Crafts:
Trisodium 4-hydroxy-3-[[4'-[(1-hydroxy-4-sulphonato-2-naphthyl)azo]-3,3'-dimethoxy[1,1'-biphenyl]-4-yl]azo]naphthalene-2,7-disulphonate can be used in art and crafts for creating unique color effects and designs on various surfaces, such as paper, wood, and canvas.
Standard:
The standard properties of trisodium 4-hydroxy-3-[[4'-[(1-hydroxy-4-sulphonato-2-naphthyl)azo]-3,3'-dimethoxy[1,1'-biphenyl]-4-yl]azo]naphthalene-2,7-disulphonate include its acid resistance (ISO 5), alkali resistance (ISO 3), light fastness (ISO 2), soaping (ISO 1-2), water fading (ISO 1), and stain fading (ISO 1). These properties make it suitable for various applications where color stability and durability are required.

Preparation

3,3′-Dimethoxylbenzidine double nitriding, first with 4-Hydroxynaphthalene-1-sulfonic acid coupling, then with?4-Hydroxynaphthalene-2,7-disulfonic acid coupling.

Standard

Acid Resistance

Fading

Stain

ISO

Check Digit Verification of cas no

The CAS Registry Mumber 6473-33-2 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 6,4,7 and 3 respectively; the second part has 2 digits, 3 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 6473-33:
(6*6)+(5*4)+(4*7)+(3*3)+(2*3)+(1*3)=102
102 % 10 = 2
So 6473-33-2 is a valid CAS Registry Number.

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