Description

2,7-Naphthalenedisulfonic Acid,4,5-Dihydroxy-3-[(2-Hydroxy-5-Nitro-3-Sulfophenyl)Azo]-6-[(3-Sulfophenyl)Azo]- is a high-purity, complex azo dye intermediate characterized by its multiple sulfonic acid groups and azo linkages. This compound is essential for synthesizing specialized dyes and pigments that require excellent water solubility, thermal stability, and specific color properties. It is primarily sought after by manufacturers in the textile, ink, and specialty chemical industries for producing high-value colorants.

Application

• Textile Dyeing: A key intermediate for producing acid dyes and direct dyes for nylon, wool, silk, and paper.
• Ink Formulation: Used in the manufacture of inks for jet printing, packaging, and security applications requiring specific chromaticity and stability.
• Functional Pigments: Serves as a precursor for pigments used in coatings, plastics, and other polymer colorations.
• Biological Staining: Potential use in the synthesis of stains for histological and cytological applications in laboratories.
• Chemical Research: Employed as a building block in organic synthesis and materials science research for novel chromophores.
• Analytical Reagents: Can be used in the development of colorimetric indicators and sensors.

Basic Information

Item	Detail
Product Name	2,7-Naphthalenedisulfonic Acid,4,5-Dihydroxy-3-[(2-Hydroxy-5-Nitro-3-Sulfophenyl)Azo]-6-[(3-Sulfophenyl)Azo]-
CAS No.	26069-45-4
Molecular Formula	C28H17N5O16S4
Molecular Weight	823.70 g/mol
Synonyms	Acid Black 210; C.I. 300310; 4,5-Dihydroxy-3-[(2-hydroxy-5-nitro-3-sulfophenyl)azo]-6-[(3-sulfophenyl)azo]-2,7-naphthalenedisulfonic acid; 2,7-Naphthalenedisulfonic acid, 4,5-dihydroxy-3-[(2-hydroxy-5-nitro-3-sulfophenyl)azo]-6-[(3-sulfophenyl)azo]-; C.I. Acid Black 210; Mordant Black 17 (related class); Azo dye intermediate 26069-45-4
EINECS	Contact for details

Quality Control

Our production of 2,7-Naphthalenedisulfonic Acid,4,5-Dihydroxy-3-[(2-Hydroxy-5-Nitro-3-Sulfophenyl)Azo]-6-[(3-Sulfophenyl)Azo]- adheres to stringent quality management protocols. Every batch undergoes rigorous analytical testing to ensure consistent purity, chemical identity, and performance characteristics. Comprehensive Certificates of Analysis (COA) detailing assay, impurity profile, and physical specifications are provided to guarantee traceability and compliance with your technical requirements.

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 sealed to prevent 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%
Loss on Drying	≤ 5.0%
Sulfated Ash	≤ 1.0%
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.