Description

Diammonium 7-Amino-4-Hydroxy-3-[[4-[(4-Sulphonatophenyl)Azo]Phenyl]Azo]Naphthalene-2-Sulphonate is a high-purity, water-soluble azo dye intermediate essential for producing vibrant and stable colorants. Its value lies in its precise chemical structure, which enables the synthesis of dyes with excellent lightfastness and washfastness properties for demanding applications. This compound is a critical raw material for manufacturers in the textile, ink, and specialty coatings industries seeking reliable and consistent color performance.

Application

• Textile Dyeing: A key intermediate for synthesizing reactive and direct dyes for coloring cotton, wool, and nylon fibers.
• Ink Formulation: Used in the production of pigments for high-quality printing inks, including inks for packaging and publications.
• Industrial Coatings: Serves as a precursor for colorants in paints, lacquers, and other surface coatings requiring durability.
• Leather Processing: Employed in the manufacture of dyes for achieving deep, uniform shades on leather goods.
• Paper Coloring: Used to produce dyes for specialty paper products where color consistency is paramount.
• Research & Development: Acts as a standard or building block in chemical research for developing new chromophores and functional dyes.

Basic Information

Item	Details
Product Name	Diammonium 7-Amino-4-Hydroxy-3-[[4-[(4-Sulphonatophenyl)Azo]Phenyl]Azo]Naphthalene-2-Sulphonate
CAS No.	68227-38-3
Molecular Formula	C22H20N6O8S2 · 2(NH3)
Molecular Weight	Contact for details
Synonyms	Acid Black 210 (Diammonium Salt); C.I. 300310; Diammonium 7-Amino-4-hydroxy-3-((4-((4-sulfophenyl)azo)phenyl)azo)naphthalene-2-sulfonate; 7-Amino-4-hydroxy-3-[[4-[(4-sulfophenyl)azo]phenyl]azo]naphthalene-2-sulfonic acid, diammonium salt; Azo Dye Intermediate 68227-38-3; Diammonium Salt of Acid Black 210; Reactive Dye Intermediate
EINECS	Contact for details

Quality Control

Our Diammonium 7-Amino-4-Hydroxy-3-[[4-[(4-Sulphonatophenyl)Azo]Phenyl]Azo]Naphthalene-2-Sulphonate 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 and industry standards. Certificates of Analysis (COA) documenting all critical parameters are provided to guarantee traceability and supply chain reliability.

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 product is hygroscopic (moisture-sensitive); the container must be kept tightly sealed to prevent absorption of atmospheric moisture, which can affect product quality and handling properties.

Specification

Item	Specification
Appearance	Dark powder or crystalline solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Moisture Content	≤ 5.0%
Solubility (in Water)	Clear solution
Heavy Metals (as Pb)	≤ 20 ppm

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