Description

Disodium 4-Amino-5-Hydroxy-3,6-Bis[[4-[(4-Hydroxyphenyl)Azo]Phenyl]Azo]Naphthalene-2,7-Disulphonate is a high-purity, synthetic organic dye belonging to the class of azo dyes, specifically a disulfonated bis-azo compound. Its complex molecular structure provides excellent color strength and specific affinity for various substrates, making it a critical component for demanding industrial coloration processes. This product is essential for manufacturers and formulators in the textile, ink, and specialty coatings industries who require consistent, high-performance pigments.

Application

• Textile Dyeing: Primary application for dyeing natural and synthetic fibers, particularly where bright, wash-fast shades are required.
• Ink Manufacturing: Used in the formulation of high-quality printing inks for packaging, publications, and security printing.
• Specialty Coatings: Imparts color to industrial coatings, paints, and lacquers where lightfastness and chemical resistance are important.
• Paper Coloring: Employed in the production of colored papers and paper products.
• Leather Finishing: Used for dyeing leather goods to achieve vibrant and durable colors.
• Plastics and Polymers: Can be used as a colorant for certain types of plastics and synthetic materials.
• Biological Staining (Research Grade): Potential use as a histological stain in laboratory settings for specialized applications.
• Chemical Intermediate: Serves as a precursor or intermediate in the synthesis of more complex dye molecules and functional chemicals.

Basic Information

Product Name	Disodium 4-Amino-5-Hydroxy-3,6-Bis[[4-[(4-Hydroxyphenyl)Azo]Phenyl]Azo]Naphthalene-2,7-Disulphonate
CAS No.	94386-24-0
Molecular Formula	C44H28N10Na2O12S2
Molecular Weight	990.85 g/mol
Synonyms	Acid Black 210; C.I. 300310; Disodium 4-amino-5-hydroxy-3,6-bis[[4-[(4-hydroxyphenyl)azo]phenyl]azo]naphthalene-2,7-disulfonate; Bis-azo dye 94386-24-0; 4-Amino-5-hydroxy-3,6-bis({4-[(4-hydroxyphenyl)diazenyl]phenyl}diazenyl)naphthalene-2,7-disulfonic acid disodium salt; Direct Black 210 (related class); Azo Dye for Textile (generic)
EINECS	Contact for details

Quality Control

Our Disodium 4-Amino-5-Hydroxy-3,6-Bis[[4-[(4-Hydroxyphenyl)Azo]Phenyl]Azo]Naphthalene-2,7-Disulphonate is manufactured under a strict quality management system. Each batch undergoes comprehensive analytical testing to ensure it meets precise specifications for color value, purity, and impurity profiles. A Certificate of Analysis (COA) detailing key parameters such as assay, heavy metal content, and identification is provided with every shipment to guarantee traceability and compliance with your formulation requirements.

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). This material is hygroscopic (moisture-sensitive) and light-sensitive; therefore, containers must be kept tightly sealed when not in use to prevent degradation and absorption of atmospheric moisture. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	Dark brown to black powder or solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Color Strength	100 ± 5% (vs. Standard)
Moisture Content (KF)	≤ 5.0%
Water Solubility	Freely soluble
Heavy Metals (as Pb)	≤ 20 ppm
Ash Content	≤ 1.0%

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