Description

4-Amino-5-Hydroxy-3-[(4-Nitrophenyl)Azo]-6-(Phenylazo)Naphthalene-2,7-Disulphonic Acid is a specialized azo dye intermediate characterized by its complex disulphonic acid structure. This compound is valued for its role in synthesizing high-performance dyes and pigments, offering excellent color properties and structural versatility. It is primarily required by manufacturers in the textile, ink, and specialty chemical industries for producing vibrant and stable colorants.

Application

• Textile Dye Intermediate: A key precursor for the synthesis of acid dyes and direct dyes used on nylon, silk, wool, and paper.
• Ink Pigment Manufacturing: Used in the production of pigments for printing inks, including those for packaging and security applications.
• Functional Dye Synthesis: Serves as a building block for dyes used in biological staining, pH indicators, and other analytical reagents.
• Leather Coloring: Employed in the manufacture of dyes for coloring leather goods.
• Research & Development: Utilized in chemical research for developing new chromophores and studying azo dye chemistry.

Basic Information

Product Name	4-Amino-5-Hydroxy-3-[(4-Nitrophenyl)Azo]-6-(Phenylazo)Naphthalene-2,7-Disulphonic Acid
CAS No.	3121-74-2
Molecular Formula	C22H16N6O9S2
Molecular Weight	572.53 g/mol
Synonyms	Acid Black 107; C.I. 15711; 2,7-Naphthalenedisulfonic acid, 4-amino-5-hydroxy-3-[(4-nitrophenyl)azo]-6-(phenylazo)-; 4-Amino-5-hydroxy-3-(4-nitrophenylazo)-6-phenylazonaphthalene-2,7-disulfonic acid; 3-[(4-Nitrophenyl)azo]-4-amino-5-hydroxy-6-(phenylazo)-2,7-naphthalenedisulfonic acid; 6-Phenylazo-4-amino-5-hydroxy-3-(4-nitrophenylazo)-2,7-naphthalenedisulfonic acid; Azo Dye Intermediate 3121-74-2
EINECS	221-500-4

Quality Control

Our production of 4-Amino-5-Hydroxy-3-[(4-Nitrophenyl)Azo]-6-(Phenylazo)Naphthalene-2,7-Disulphonic Acid adheres to stringent quality management systems. Every batch undergoes rigorous analytical testing to ensure consistency, purity, and compliance with agreed specifications. Certificates of Analysis (COA) documenting identity, assay, and impurity profiles are provided to guarantee traceability and support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). Keep away from incompatible materials such as strong oxidizing agents. Due to its light-sensitive nature, prolonged exposure to direct light should be avoided to maintain product integrity.

Specification

Item	Specification
Appearance	Dark brown to black powder or crystalline solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 2.0%
Sulfated Ash	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm
Water Solubility	Freely soluble

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.