Description

4-Amino-5-Hydroxy-3-[[4-[(2-Hydroxy-6-Sulfonaphthalen-1-Yl)Azo]Phenyl]Azo]-6-(Phenylazo)-2,7-Naphthalenedisulfonic Acid is a high-purity, polyazo naphthalene-based dye intermediate. This compound is valued for its ability to impart strong, vibrant colors and its excellent binding properties in complex formulations. It is primarily sought after by manufacturers in the textile dyeing, specialty ink, and advanced pigment production industries.

Application

• Textile Dyeing: A key intermediate for synthesizing high-performance azo dyes for cotton, wool, and synthetic fibers.
• Specialty Inks: Used in the formulation of industrial and security inks requiring specific color fastness and stability.
• Pigment Manufacturing: Serves as a precursor for creating organic pigments used in plastics, coatings, and paints.
• Research & Development: Employed in chemical research for developing new chromophores and studying azo coupling reactions.
• Paper Coloring: Potential use in the production of high-grade, color-fast papers and decorative materials.
• Biological Staining: May be utilized in the synthesis of stains for histological and microbiological applications.

Basic Information

Product Name	4-Amino-5-Hydroxy-3-[[4-[(2-Hydroxy-6-Sulfonaphthalen-1-Yl)Azo]Phenyl]Azo]-6-(Phenylazo)-2,7-Naphthalenedisulfonic Acid
CAS No.	72845-88-6
Molecular Formula	C32H22N8O11S3
Molecular Weight	814.75 g/mol
Synonyms	Acid Black 210; C.I. 300310; 2,7-Naphthalenedisulfonic acid, 4-amino-5-hydroxy-3-((4-((2-hydroxy-6-sulfo-1-naphthalenyl)azo)phenyl)azo)-6-(phenylazo)-; Polyazo dye intermediate; Trisazo dye intermediate; 4-Amino-5-hydroxy-3,6-bis(phenylazo)-2,7-naphthalenedisulfonic acid derivative; Azo Black 210
EINECS	Contact for details

Quality Control

Our production of this dye intermediate adheres to stringent quality control protocols to ensure batch-to-batch consistency and high purity. Quality is verified through advanced analytical techniques including HPLC and spectrophotometry. A Certificate of Analysis (COA) detailing purity, identity, and impurity profiles is provided with every shipment to guarantee compliance with your specifications.

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 (moisture-sensitive) nature, the container must be kept sealed to prevent absorption of atmospheric moisture, which can affect product performance and stability.

Specification

Item	Specification
Appearance	Dark brown to black powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Sulfated Ash	≤ 1.0%
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.