Description

Trisodium 4-Amino-5-Hydroxy-3-[(4-Nitrophenyl)Azo]-6-[(3-Sulphonatophenyl)Azo]Naphthalene-2,7-Disulphonate is a high-purity, water-soluble azo dye intermediate known for its complex molecular structure and vibrant color properties. This compound is valued for its role in synthesizing specialized dyes and pigments with excellent light and wash fastness. It is primarily required by manufacturers in the textile, ink, and specialty coatings industries seeking to produce high-performance colorants.

Application

• Textile Dyeing: A key intermediate for producing reactive and direct dyes for cotton, wool, and nylon, offering strong color yield and durability.
• Ink Formulation: Used in the manufacture of high-quality printing inks, including those for packaging and security printing applications.
• Industrial Pigments: Serves as a precursor for creating complex organic pigments used in plastics, paints, and coatings.
• Research & Development: Employed in chemical research for synthesizing novel azo compounds and studying their photochemical properties.
• Leather Coloring: Utilized in the production of dyes for the leather tanning and finishing industry.
• Paper Coloring: Applied in the manufacture of dyes for specialty paper products requiring specific color fastness.

Basic Information

Product Name	Trisodium 4-Amino-5-Hydroxy-3-[(4-Nitrophenyl)Azo]-6-[(3-Sulphonatophenyl)Azo]Naphthalene-2,7-Disulphonate
CAS No.	67786-07-6
Molecular Formula	C28H15N6Na3O13S3
Molecular Weight	~824.62 g/mol
Synonyms	4-Amino-5-hydroxy-3-[(4-nitrophenyl)azo]-6-[(3-sulfophenyl)azo]naphthalene-2,7-disulfonic acid trisodium salt; C.I. Reactive Black 5 intermediate; Trisodium 4-amino-5-hydroxy-3-(4-nitrophenylazo)-6-(3-sulfophenylazo)naphthalene-2,7-disulfonate; Reactive Black 5 precursor; Azo dye intermediate 67786-07-6; 3-[(4-Nitrophenyl)azo]-4-amino-5-hydroxy-6-[(3-sulfophenyl)azo]naphthalene-2,7-disulfonic acid trisodium salt
EINECS	Contact for details

Quality Control

Our Trisodium 4-Amino-5-Hydroxy-3-[(4-Nitrophenyl)Azo]-6-[(3-Sulphonatophenyl)Azo]Naphthalene-2,7-Disulphonate is manufactured under a strict quality management system. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure it meets precise customer specifications and industry standards. Certificates of Analysis (COA) documenting purity, heavy metal content, and other critical parameters are provided with each shipment.

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). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed to prevent absorption of atmospheric moisture. Keep away from incompatible materials such as strong oxidizing agents.

Specification

Item	Specification
Appearance	Dark powder or crystalline solid
Identification (IR)	Conforms to structure
Assay (HPLC)	Min. 95%
Water Content (KF)	Max. 5.0%
Heavy Metals (as Pb)	Max. 20 ppm
Solubility (in Water)	Freely soluble

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