Description

2,7-Naphthalenedisulfonic Acid, 4-Amino-6-2,5-Dimethoxy-4-2-(Sulfooxy)Ethylsulfonylphenylazo-5-Hydroxy-3-4-2-(Sulfooxy)Ethylsulfonylphenylazo- is a high-purity, synthetic organic dye intermediate belonging to the class of polyazo dyes with multiple sulfonic acid groups. This compound is engineered for exceptional color strength and stability, making it a critical component for producing high-performance dyes and pigments. It is primarily needed by manufacturers in the textile, ink, and specialty coatings industries seeking vibrant, wash-fast, and lightfast colors.

Application

• Textile Dyeing: As a key intermediate for synthesizing reactive and direct dyes for cotton, wool, and nylon, providing excellent wash and light fastness.
• Inkjet Inks: Used in the formulation of high-quality digital printing inks, contributing to brilliant color gamut and print durability.
• Industrial Pigments: Serves as a precursor for creating pigments used in plastics, paints, and specialty coatings.
• Paper Coloring: Employed in the production of dyes for high-grade paper and packaging materials.
• Biological Staining: Potential use as a staining agent in histology and microscopy due to its chromophoric structure.
• Research & Development: Serves as a valuable building block in organic synthesis and material science research for novel chromophores.

Basic Information

Item	Details
Product Name	2,7-Naphthalenedisulfonic Acid, 4-Amino-6-2,5-Dimethoxy-4-2-(Sulfooxy)Ethylsulfonylphenylazo-5-Hydroxy-3-4-2-(Sulfooxy)Ethylsulfonylphenylazo-
CAS No.	68399-93-9
Molecular Formula	C34H32N6O20S6
Molecular Weight	Contact for details
Synonyms	Reactive Black 5 (precursor/intermediate); Polyazo dye intermediate; 4-Amino-5-hydroxy-3,6-bis((4-(2-(sulfooxy)ethylsulfonyl)-2,5-dimethoxyphenyl)diazenyl)naphthalene-2,7-disulfonic acid; C.I. Reactive Black 5 related compound; Bis(vinylsulfone) dye intermediate; Tetrasulfonated azo dye; Azo dye for textiles; Sulfonated naphthalene azo compound
EINECS	Contact for details

Quality Control

Our production of this dye intermediate adheres to stringent quality control protocols to ensure batch-to-batch consistency and purity for your synthesis processes. Every lot is analyzed using advanced techniques like HPLC and spectrophotometry to confirm identity and strength. A comprehensive Certificate of Analysis (COA) detailing purity, impurity profile, and physical specifications is provided with each shipment to support your quality assurance systems.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept sealed to prevent absorption of atmospheric moisture, which can affect performance and stability.

Specification

Item	Specification
Appearance	Dark powder or solid
Identification (IR)	Conforms to structure
Assay (HPLC)	Min. 95%
Moisture Content	Max. 5.0%
Solubility (in Water)	Completely soluble
Heavy Metals (as Pb)	Max. 20 ppm
Sulfated Ash	Max. 1.0%

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