Description

Disodium 4-Amino-5-Hydroxy-3-[(2-Methyl-5-Nitrophenyl)Azo]-6-(Phenylazo)Naphthalene-2,7-Disulphonate is a high-purity, synthetic azo dye intermediate known for its distinct chromophoric properties. This compound is critical for producing vivid and stable colorants, offering excellent tinctorial strength and compatibility in complex formulations. It is primarily utilized by manufacturers in the textile, ink, and specialty chemical industries seeking reliable and consistent dye precursors.

Application

• Primary Intermediate for Azo Dyes: Serves as a key building block in the synthesis of high-performance red and black azo dyes for textiles and leather.
• Specialty Ink Manufacturing: Used in the production of pigments for industrial inks, including those for packaging and security printing.
• Research & Development: Employed in chemical research for developing novel chromophores and studying azo coupling reactions.
• Functional Colorants: Potential use in the formulation of colorants for plastics and other polymeric materials requiring specific lightfastness.

Basic Information

Product Name	Disodium 4-Amino-5-Hydroxy-3-[(2-Methyl-5-Nitrophenyl)Azo]-6-(Phenylazo)Naphthalene-2,7-Disulphonate
CAS No.	5850-41-9
Molecular Formula	C23H16N6Na2O10S2
Molecular Weight	638.52 g/mol
Synonyms	Acid Black 210; C.I. 300310; Disodium 4-amino-5-hydroxy-3-[(2-methyl-5-nitrophenyl)azo]-6-(phenylazo)naphthalene-2,7-disulfonate; 2,7-Naphthalenedisulfonic acid, 4-amino-5-hydroxy-3-[(2-methyl-5-nitrophenyl)azo]-6-(phenylazo)-, disodium salt; Azo Black 210; C.I. Acid Black 210; Disodium 3-[(2-methyl-5-nitrophenyl)azo]-4-amino-5-hydroxy-6-(phenylazo)naphthalene-2,7-disulphonate
EINECS	Contact for details

Quality Control

Our Disodium 4-Amino-5-Hydroxy-3-[(2-Methyl-5-Nitrophenyl)Azo]-6-(Phenylazo)Naphthalene-2,7-Disulphonate is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure it meets precise customer specifications. A comprehensive Certificate of Analysis (COA) detailing purity, heavy metal content, and other critical parameters is provided with each shipment.

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). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed after each use to prevent degradation from atmospheric moisture.

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	≤ 20.0%
Heavy Metals (as Pb)	≤ 20 ppm
Solubility (in Water)	Freely soluble

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