Description

1,5-Naphthalenedisulfonic acid, 2-6-4-2-4-6-(2,5-disulfophenyl)azo-5-hydroxy-7-sulfo-2-naphthalenylamino-6-fluoro-1,3,5-triazin-2-ylaminopropylamino-6-fluoro-1,3,5-triazin-2-ylamino-1-hydroxy-3-sulfo-2-naphthalenylazo-, sodium salt is a high-performance, polyfunctional azo dye intermediate of significant industrial importance. Its complex molecular architecture, featuring multiple sulfonic acid groups, azo linkages, and reactive triazine rings, provides exceptional binding affinity and chromophoric properties. This compound is primarily sought after by manufacturers in the textile, specialty ink, and advanced material coating sectors for synthesizing dyes with superior fastness and specific functional characteristics.

Application

• Reactive Dye Synthesis: A key precursor for manufacturing high-grade reactive dyes used in cotton, wool, and nylon dyeing, offering excellent wash and light fastness.
• Textile Printing Inks: Used in the formulation of specialized inks for digital and screen printing on textiles, providing vibrant and durable colors.
• Functional Pigments: Serves as an intermediate for creating pigments with enhanced properties for coatings, plastics, and inks.
• Paper Coloring: Employed in the production of dyes for high-quality paper and specialty board products.
• Leather Finishing: Used in dye formulations for leather, contributing to deep, uniform coloration.
• Research & Development: A valuable building block in chemical R&D for developing new chromophores and functional materials.

Basic Information

Product Name	1,5-Naphthalenedisulfonic acid, 2-6-4-2-4-6-(2,5-disulfophenyl)azo-5-hydroxy-7-sulfo-2-naphthalenylamino-6-fluoro-1,3,5-triazin-2-ylaminopropylamino-6-fluoro-1,3,5-triazin-2-ylamino-1-hydroxy-3-sulfo-2-naphthalenylazo-, sodium salt
CAS No.	181581-71-5
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	C.I. Reactive Black 31 (probable); Polyazo dye intermediate; Sodium 1,5-naphthalenedisulfonate azo dye derivative; Reactive black dye intermediate; Triazine-containing azo dye; Multisulfonated azo-triazine compound; Black 31 intermediate; Textile dye precursor
EINECS	Contact for details

Quality Control

Our production of this advanced dye intermediate adheres to strict quality management protocols to ensure batch-to-batch consistency and performance reliability. Quality is verified through analytical methods including HPLC for purity and spectrophotometry for strength. A comprehensive Certificate of Analysis (COA) detailing assay, impurity profile, and physical specifications is provided with every shipment to support your quality assurance and regulatory needs.

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); ensure the container is kept tightly sealed to prevent absorption of atmospheric moisture, which may affect performance.

Specification

Item	Specification
Appearance	Dark powder or granules
Identification (IR)	Conforms to structure
Assay (HPLC)	Min. 90%
Moisture Content	Max. 5.0%
Water Solubility	Completely 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.