Description

Disodium 8-[(4-Amino-2,5-Dimethoxyphenyl)Azo]-5-[(3-Sulphonatophenyl)Azo]Naphthalene-2-Sulphonate is a high-purity, disazo-based anionic dye intermediate. This compound is valued for its ability to impart vibrant and stable color properties in demanding industrial applications. It is primarily required by manufacturers in the textile, ink, and specialty chemical sectors seeking consistent performance and reliable supply for their production processes.

Application

• Primary Intermediate for Textile Dyes: A key building block in the synthesis of direct, acid, and reactive dyes for coloring cotton, wool, nylon, and silk.
• Inkjet and Printing Inks: Used in the formulation of high-performance inks where color strength and lightfastness are critical.
• Paper Coloring: Employed in the production of colored papers and paper products.
• Leather Dyeing: Applied in the dyeing process for leather goods to achieve deep, uniform shades.
• Biological Staining: Potential use as a histological stain in laboratory settings due to its specific chromophoric structure.
• Specialty Chemical Synthesis: Serves as a functional intermediate for creating more complex colorants and functional chemicals.

Basic Information

Product Name	Disodium 8-[(4-Amino-2,5-Dimethoxyphenyl)Azo]-5-[(3-Sulphonatophenyl)Azo]Naphthalene-2-Sulphonate
CAS No.	68214-02-8
Molecular Formula	C30H22N6Na2O10S2
Molecular Weight	728.63 g/mol
Synonyms	Acid Black 210; C.I. 300310; Disodium 8-[(4-amino-2,5-dimethoxyphenyl)azo]-5-[(3-sulfophenyl)azo]naphthalene-2-sulfonate; 8-[(4-Amino-2,5-dimethoxyphenyl)azo]-5-[(3-sulfophenyl)azo]-2-naphthalenesulfonic acid disodium salt; Direct Black 210; Azo Black 210; Disazo dye intermediate 68214-02-8
EINECS	Contact for details

Quality Control

Our production of this dye intermediate adheres to strict quality management protocols to ensure batch-to-batch consistency and high purity. Quality is verified through comprehensive analytical testing including HPLC for assay and impurity profiling, spectrophotometry for color strength, and standard identification tests. A Certificate of Analysis (COA) detailing all specifications is provided with every 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). This material is hygroscopic (moisture-sensitive); keep the container tightly sealed 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%
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.