Description

1-[3-[[6-[(4-Aminobenzoyl)amino]-1-hydroxy-3-sulfo-2-naphthalenyl]azo]phenyl]-4,5-dihydro-4-[[2-methoxy-4-[(3-sulfophenyl)azo]phenyl]azo]-5-oxo-1H-pyrazole-3-carboxylic acid trisodium salt is a high-purity, water-soluble azo dye intermediate of significant commercial importance. Its complex polyazo structure is engineered to deliver exceptional color strength, brightness, and stability in demanding applications. This compound is primarily sought by manufacturers in the textile, leather, and specialty ink industries for producing high-performance dyes and pigments.

Application

• Textile Dyeing: A key intermediate for synthesizing high-grade, wash-fast azo dyes for cotton, wool, and synthetic fibers.
• Leather Finishing: Used in the production of pigments and dyes for coloring leather goods with deep, uniform shades.
• Specialty Inks: Serves as a precursor for manufacturing pigments used in inks for packaging, security printing, and digital applications.
• Paper Coloring: Employed in the synthesis of dyes for high-quality paper and cardboard products.
• Research & Development: Used as a reference standard and building block in chemical research for novel colorant development.
• Functional Dyes: Potential intermediate for creating dyes with specific properties for non-textile uses, such as in optical media or sensors.

Basic Information

Product Name	1-[3-[[6-[(4-Aminobenzoyl)amino]-1-hydroxy-3-sulfo-2-naphthalenyl]azo]phenyl]-4,5-dihydro-4-[[2-methoxy-4-[(3-sulfophenyl)azo]phenyl]azo]-5-oxo-1H-pyrazole-3-carboxylic acid trisodium salt
CAS No.	71701-23-0
Molecular Formula	C41H27N9Na3O14S3
Molecular Weight	1050.85 g/mol (approx.)
Synonyms	Trisodium 1-[3-[[6-[(4-aminobenzoyl)amino]-1-hydroxy-3-sulfo-2-naphthyl]azo]phenyl]-4,5-dihydro-4-[[2-methoxy-4-[(3-sulfophenyl)azo]phenyl]azo]-5-oxo-1H-pyrazole-3-carboxylate; C.I. Acid Black 210; Acid Black 210; Azo Black Dye Intermediate; Polyazo Dye Intermediate; 71701-23-0; Black 210 Dye Precursor
EINECS	Contact for details

Quality Control

Our production of this azo dye intermediate adheres to strict quality management protocols to ensure batch-to-batch consistency and purity. Every lot is analyzed using advanced techniques like HPLC and spectrophotometry to confirm identity and strength. A comprehensive Certificate of Analysis (COA) detailing purity, impurity profile, and physical specifications is provided with each shipment 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). This material is hygroscopic (moisture-sensitive); keep the container tightly sealed when not in use to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	Dark brown to black powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Moisture Content	≤ 5.0%
Sulfated Ash	≤ 20.0%
Water Solubility	Freely soluble
Heavy Metals (as Pb)	≤ 20 ppm

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