Description

2-Naphthalenesulfonic Acid, 4-Hydroxy-3-4-(4-Nitro-2-Sulfophenyl)Azo-6(Or 7)-Sulfo-1-Naphthalenylazo-7-(Phenylamino)-, Trisodium Salt is a high-purity, water-soluble azo dye intermediate of significant commercial importance. This compound is valued for its role in synthesizing vibrant and stable colorants, particularly in the production of acid dyes and pigments. It is an essential raw material for manufacturers in the textile, leather, ink, and specialty chemical industries seeking consistent quality and performance in their coloring processes.

Application

• Primary Intermediate for Acid Dyes: A key building block in the synthesis of acid dyes used for coloring nylon, wool, silk, and other polyamide fibers.
• Leather Dyeing: Used in the formulation of dyes for high-quality leather finishing, providing good penetration and color fastness.
• Ink Manufacturing: Employed in the production of inks for specialty printing applications, including inks for packaging and security features.
• Pigment Synthesis: Serves as a precursor in the manufacture of certain high-performance organic pigments.
• Paper Coloring: Utilized in the dyeing of specialty papers and paper products.
• Research & Development: Used in chemical research for developing new chromophores and studying azo dye chemistry.

Basic Information

Item	Details
Product Name	2-Naphthalenesulfonic Acid, 4-Hydroxy-3-4-(4-Nitro-2-Sulfophenyl)Azo-6(Or 7)-Sulfo-1-Naphthalenylazo-7-(Phenylamino)-, Trisodium Salt
CAS No.	8004-75-9
Molecular Formula	C32H19N5Na3O13S3
Molecular Weight	879.68 g/mol (approx.)
Synonyms	Acid Black 210; C.I. 300310; Trisodium 4-hydroxy-3-((4-((4-nitro-2-sulfophenyl)azo)-6(or 7)-sulfo-1-naphthyl)azo)-7-(phenylamino)-2-naphthalenesulfonate; 2-Naphthalenesulfonic acid, 4-hydroxy-3-((4-((4-nitro-2-sulfophenyl)azo)-6(or 7)-sulfo-1-naphthalenyl)azo)-7-(phenylamino)-, trisodium salt; Azo dye intermediate for Acid Black 210; C.I. Acid Black 210 intermediate
EINECS	Contact for details

Quality Control

Our 2-Naphthalenesulfonic Acid, 4-Hydroxy-3-4-(4-Nitro-2-Sulfophenyl)Azo-6(Or 7)-Sulfo-1-Naphthalenylazo-7-(Phenylamino)-, Trisodium Salt is manufactured under a strict quality management system to ensure batch-to-batch consistency and purity. The product undergoes rigorous analytical testing, including HPLC for assay and impurity profiling, to meet the stringent requirements of industrial dye synthesis. A comprehensive Certificate of Analysis (COA) detailing identity, purity, and physical 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) and light-sensitive; prolonged exposure to moisture or direct light should be avoided to maintain product integrity and color strength.

Specification

Item	Specification
Appearance	Dark brown to black powder or granules
Identification (IR)	Conforms to structure
Assay (HPLC)	Min. 95%
Moisture Content	Max. 5.0%
Water Solubility	Freely soluble
Heavy Metals (as Pb)	Max. 20 ppm
pH (1% Solution)	6.0 - 8.0

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