Description

1,7-Dihydroxy-8-[[4'-[[2-hydroxy-3,6-bis(sodiosulfo)-1-naphthalenyl]azo]-3,3'-dimethoxy-1,1'-biphenyl-4-yl]azo]-4-(sodiosulfo)naphthalene-2-carboxylic acid sodium salt is a high-purity, water-soluble azo dye intermediate of significant commercial importance. Its complex polyazo structure, featuring multiple sulfonate groups, provides excellent solubility and strong chromophoric properties, making it a critical precursor for the synthesis of specialized dyes and pigments. This compound is primarily sought after by manufacturers in the textile, ink, and specialty coatings industries for producing high-value, color-fast products.

Application

• Primary Intermediate for Reactive Dyes: A key building block in the synthesis of high-grade reactive dyes for cotton and other cellulosic fibers.
• Specialty Ink Manufacturing: Used in the production of pigments for inks requiring specific solubility and color properties, such as for inkjet and security printing.
• Functional Dye Synthesis: Serves as a precursor for dyes used in analytical chemistry, biological staining, and as sensitizers in photographic applications.
• Industrial Pigments: Employed in the manufacture of pigments for plastics, paints, and coatings where water solubility or specific ionic characteristics are required.
• Research & Development: Utilized in chemical research for developing new chromophores and studying azo dye chemistry and photostability.

Basic Information

Product Name	1,7-Dihydroxy-8-[[4'-[[2-hydroxy-3,6-bis(sodiosulfo)-1-naphthalenyl]azo]-3,3'-dimethoxy-1,1'-biphenyl-4-yl]azo]-4-(sodiosulfo)naphthalene-2-carboxylic acid sodium salt
CAS No.	6428-89-3
Molecular Formula	C41H24N6Na4O17S4
Molecular Weight	1114.88 g/mol
Synonyms	Acid Black 210; C.I. 300310; 1,7-Dihydroxy-8-[[4'-[[2-hydroxy-3,6-disulfo-1-naphthyl]azo]-3,3'-dimethoxy[1,1'-biphenyl]-4-yl]azo]-4-sulfo-2-naphthalenecarboxylic acid tetrasodium salt; Tetrasodium 1,7-dihydroxy-8-[[4'-[[2-hydroxy-3,6-disulfo-1-naphthyl]azo]-3,3'-dimethoxy[1,1'-biphenyl]-4-yl]azo]-4-sulfo-2-naphthalenecarboxylate; Reactive Black 5 related intermediate; Polyazo dye intermediate; Sulfonated azo dye
EINECS	Contact for details

Quality Control

Our production of this advanced dye intermediate adheres to strict quality management systems. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure consistency and meet precise customer specifications. A detailed Certificate of Analysis (COA) is provided with each shipment, documenting key parameters such as assay, impurity profile, and physical properties.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). Due to its hygroscopic nature, the container must be kept tightly sealed to prevent moisture absorption, which can affect product stability and handling properties. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	Dark brown to black powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Moisture Content	≤ 5.0%
Solubility (in Water)	Clear solution
Heavy Metals (as Pb)	≤ 20 ppm
pH (1% Solution)	6.0 - 8.0

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