Description

Trisodium 4-Hydroxy-7-[[[[5-Hydroxy-6-(Phenylazo)-7-Sulphonato-2-Naphthyl]Amino]Carbonyl]Amino]-3-[(6-Sulphonato-2-Naphthyl)Azo]Naphthalene-2-Sulphonate is a high-purity, water-soluble azo dye intermediate known for its complex, multi-functional structure. This compound is valued for its role in synthesizing specialized dyes and pigments that offer excellent color fastness and stability. It is primarily sought by manufacturers in the textile, ink, and specialty chemical industries for producing high-performance colorants.

Application

• Textile Dyeing and Printing: A key intermediate for the synthesis of reactive and direct dyes used on cotton, wool, and nylon fibers.
• Ink Manufacturing: Used in the production of high-quality pigments for industrial inks, including those for packaging and textiles.
• Specialty Pigments: Serves as a precursor for creating complex, light-fast pigments used in coatings and plastics.
• Research & Development: Employed in chemical research for developing novel chromophores and studying azo dye chemistry.
• Biological Staining: Potential use as an intermediate for synthesizing stains used in histological and microbiological applications.
• Paper Coloring: Can be utilized in the manufacture of dyes for specialty paper products.

Basic Information

Product Name	Trisodium 4-Hydroxy-7-[[[[5-Hydroxy-6-(Phenylazo)-7-Sulphonato-2-Naphthyl]Amino]Carbonyl]Amino]-3-[(6-Sulphonato-2-Naphthyl)Azo]Naphthalene-2-Sulphonate
CAS No.	6420-41-3
Molecular Formula	C43H25N7Na3O16S4
Molecular Weight	~1114.9 g/mol
Synonyms	Reactive Black 5 (precursor/intermediate); C.I. 20505; Trisodium 4-hydroxy-3-[(6-sulphonato-2-naphthyl)azo]-7-[[[[5-hydroxy-6-(phenylazo)-7-sulphonato-2-naphthyl]amino]carbonyl]amino]naphthalene-2-sulphonate; Tetrasodium 4-hydroxy-3-[(6-sulphonato-2-naphthyl)azo]-7-[[[[5-hydroxy-6-(phenylazo)-7-sulphonato-2-naphthyl]amino]carbonyl]amino]naphthalene-2-sulphonate (related form); Azo dye intermediate 6420-41-3; Black 5 dye intermediate; Polyazo dye intermediate
EINECS	Contact for details

Quality Control

Our production of Trisodium 4-Hydroxy-7-[[[[5-Hydroxy-6-(Phenylazo)-7-Sulphonato-2-Naphthyl]Amino]Carbonyl]Amino]-3-[(6-Sulphonato-2-Naphthyl)Azo]Naphthalene-2-Sulphonate adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing to ensure high purity, consistent composition, and batch-to-batch reliability. Certificates of Analysis (COA) detailing purity, identity, and impurity profiles are provided and available upon request to support your quality assurance processes.

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.

Specification

Item	Specification
Appearance	Dark powder or solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Sulfated Ash	Contact for details
Heavy Metals (as Pb)	≤ 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.