Description

2,7-Naphthalenedisulfonic acid, 5-4-chloro-6-(ethylphenylamino)-1,3,5-triazin-2-ylamino-3-5-(2,3-dibromo-1-oxopropyl)amino-2-sulfophenylazo-4-hydroxy-, sodium salt is a high-performance, complex azo dye intermediate. This compound is engineered to deliver exceptional color strength and stability, making it a critical component for producing advanced colorants. It is primarily required by manufacturers in the textile, ink, and specialty polymer industries seeking to develop vibrant and durable dyes and pigments.

Application

• Textile Dyeing: A key intermediate for synthesizing reactive and direct dyes for cotton, wool, and nylon, offering excellent wash and light fastness.
• Ink Manufacturing: Used in the production of high-quality pigments for printing inks, including those for packaging and security applications.
• Plastic and Polymer Coloring: Imparts stable coloration to engineering plastics and synthetic fibers where heat and chemical resistance are required.
• Specialty Coatings: Employed in formulating industrial and automotive coatings that demand long-term color retention and weatherability.
• Paper Coloring: Suitable for the manufacture of dyes used in high-grade paper and cardboard products.
• Research & Development: Serves as a sophisticated building block in chemical research for developing novel chromophores and functional materials.

Basic Information

Product Name	2,7-Naphthalenedisulfonic acid, 5-4-chloro-6-(ethylphenylamino)-1,3,5-triazin-2-ylamino-3-5-(2,3-dibromo-1-oxopropyl)amino-2-sulfophenylazo-4-hydroxy-, sodium salt
CAS No.	155522-14-8
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	C.I. Reactive Black 31; Reactive Black 31; Sodium 5-[[4-chloro-6-(ethylphenylamino)-1,3,5-triazin-2-yl]amino]-3-[[5-[(2,3-dibromo-1-oxopropyl)amino]-2-sulfophenyl]azo]-4-hydroxy-2,7-naphthalenedisulfonate; 155522-14-8; Reactive Black B; Azo dye intermediate for Reactive Black 31
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 performance reliability. Quality is verified through advanced analytical techniques including HPLC and spectrophotometry. A comprehensive Certificate of Analysis (COA) detailing purity, strength, and impurity profiles is provided with every 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 room temperature (15-25°C). This material is hygroscopic (moisture-sensitive); ensure the container is kept tightly sealed to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	Dark blue to black powder or solid
Identification (IR)	Conforms to structure
Assay (HPLC)	Min. 95%
Moisture Content	Max. 5.0%
Ash Content	Max. 1.0%
Water Solubility	Freely soluble

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