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BRILLIANT YELLOW is an organic diazo dye, characterized by its orange to reddish-brown crystals or powder form. It is soluble in water, resulting in a golden brown color, and has adequate solubility in ethanol for a similar hue. It exhibits slight solubility in acetone and is soluble in fiber elements. When exposed to strong sulfuric acid, it turns red light purple, and upon dilution, it becomes purple with a black light purple precipitate. In nitric acid solution, it appears dark brown. The dye solution turns dark purple upon the addition of strong hydrochloric acid, with precipitation, and turns pale orange upon the addition of a thick sodium hydroxide solution. With the addition of a 10% sodium hydroxide solution, it becomes bright red.

3051-11-4

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Basic information
1. Product Name: BRILLIANT YELLOW
2. Synonyms: Brightyellow ;C.I.DIRECTYELLOW4;Brilliant Paper Yellow C;4,4'-Bis(p-hydroxyphenylazo)stilbene-2,2'-disulfonic acid disodium salt;Brilliant Yellow【indicator】;Direct Brilliant Yellow G;Brilliant Yellow,98%;Brilliant Yellow,Direct Yellow 4
3. CAS NO:3051-11-4
4. Molecular Formula: C₂₆H₁₈N₄O₈S₂*2Na
5. Molecular Weight: 624.55
6. EINECS: 221-267-1
7. Product Categories: Intermediates of Dyes and Pigments;Organics;Stilbenes;Azo
8. Mol File: 3051-11-4.mol
Chemical Properties
1. Melting Point: >250°C
2. Boiling Point: N/A
3. Flash Point: N/A
4. Appearance: Orange/powder
5. Density: 1.5 g/cm³
6. Refractive Index: 1.691
7. Storage Temp.: Amber Vial, Refrigerator
8. Solubility: Solubility Soluble in water; slightly soluble in ethanol, aceton
9. Water Solubility: Partially soluble in water
10. Stability: Light Sensitve
11. BRN: 4122338
12. CAS DataBase Reference: BRILLIANT YELLOW(CAS DataBase Reference)
13. NIST Chemistry Reference: BRILLIANT YELLOW(3051-11-4)
14. EPA Substance Registry System: BRILLIANT YELLOW(3051-11-4)
Safety Data
1. Hazard Codes: N/A
2. Statements: N/A
3. Safety Statements: 22-24/25
4. WGK Germany: 3
5. RTECS:
6. HazardClass: N/A
7. PackingGroup: N/A
8. Hazardous Substances Data: 3051-11-4(Hazardous Substances Data)

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3051-11-4 Usage

Uses

Used in Textile Industry:
BRILLIANT YELLOW is used as a dye for cellulose fiber and polyamide fiber dyeing, due to its ability to impart vibrant color to these materials.
Used in Leather Industry:
In the leather industry, BRILLIANT YELLOW is used for coloring and staining, providing a good dye with excellent discharge properties.
Used in Paper Industry:
BRILLIANT YELLOW is also utilized for coloring paper, enhancing its appearance and visual appeal.
Environmental Considerations:
As a ground water pollutant, BRILLIANT YELLOW requires removal processes such as nanofibrous membrane filtration and nanoplatelet adsorption to mitigate its environmental impact.
Standard:
The standard for BRILLIANT YELLOW includes the following properties:
Acid Resistance: 3
Alkali Resistance: 1
Light Fastness: 5
Soaping: 1
Water Fading: 3
Stain Fading: 3
Chemical Properties:
BRILLIANT YELLOW is characterized by its orange to reddish-brown crystals or powder form, which contributes to its solubility and color-changing properties in various chemical environments.

Preparation

1,2-Bis(4-amino-2-sulfophenyl)ethene? double nitriding, and phenol (2 Moore) coupled.

Standard

Acid Resistance

Fading

Stain

AATCC

Check Digit Verification of cas no

The CAS Registry Mumber 3051-11-4 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 3,0,5 and 1 respectively; the second part has 2 digits, 1 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 3051-11:
(6*3)+(5*0)+(4*5)+(3*1)+(2*1)+(1*1)=44
44 % 10 = 4
So 3051-11-4 is a valid CAS Registry Number.

InChI:InChI=1/C26H20N4O8S2/c31-23-11-7-19(8-12-23)27-29-21-5-3-17(25(15-21)39(33,34)35)1-2-18-4-6-22(16-26(18)40(36,37)38)30-28-20-9-13-24(32)14-10-20/h1-16,29-30H,(H,33,34,35)(H,36,37,38)