Description

4-Amino-3-[[4'-[(2,4-Dihydroxyphenyl)Azo][1,1'-Biphenyl]-4-Yl]Azo]-5-Hydroxy-6-[(4-Sulphophenyl)Azo]Naphthalene-2,7-Disulphonic Acid CAS NO 93920-41-3 is a high-purity, polyazo dye intermediate of significant industrial importance. Its complex molecular structure, featuring multiple azo linkages and sulphonic acid groups, provides exceptional chromophoric strength and water solubility, making it a critical precursor for synthesizing high-performance dyes and pigments. This compound is essential for manufacturers in the textile, ink, and specialty coatings industries seeking to produce vivid, stable colors with excellent fastness properties.

Application

• Primary Intermediate for Textile Dyes: Synthesis of high-grade, wash-fast azo dyes for cotton, wool, and synthetic fibers.
• Pigment Manufacturing: Key building block for producing organic pigments used in industrial paints, inks, and plastics.
• Specialty Colorants: Production of colorants for leather, paper, and advanced materials requiring specific spectral properties.
• Research & Development: Serves as a sophisticated chemical entity for academic and industrial R&D in dye chemistry and material science.
• Functional Dye Synthesis: Potential precursor for dyes used in non-textile applications such as sensors or imaging agents.

Basic Information

Item	Detail
Product Name	4-Amino-3-[[4'-[(2,4-Dihydroxyphenyl)Azo][1,1'-Biphenyl]-4-Yl]Azo]-5-Hydroxy-6-[(4-Sulphophenyl)Azo]Naphthalene-2,7-Disulphonic Acid
CAS No.	93920-41-3
Molecular Formula	C40H27N7O11S3
Molecular Weight	910.87 g/mol
Synonyms	Acid Black 210; C.I. 300310; 1,3,6-Naphthalenetrisulfonic acid, 8-amino-7-[[4'-[(2,4-dihydroxyphenyl)azo][1,1'-biphenyl]-4-yl]azo]-4-hydroxy-5-[(4-sulfophenyl)azo]-; Polyazo dye intermediate; Trisulfonated azo dye precursor; CAS 93920-41-3
EINECS	Contact for details

Quality Control

Our production of this advanced dye intermediate adheres to strict quality management systems to ensure batch-to-batch consistency and high purity. Every lot is analyzed using advanced techniques like HPLC and spectrophotometry to confirm identity, strength, and impurity profiles. A comprehensive Certificate of Analysis (COA) detailing assay, related substances, and physical characteristics is provided with each shipment to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at a controlled room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept sealed when not in use to prevent degradation from atmospheric moisture.

Specification

Item	Specification
Appearance	Dark brown to black powder or solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Sulfated Ash	≤ 1.0%
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Total impurities ≤ 3.0%

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