Description

2,7-Naphthalenedisulfonic acid, 4-amino-5-hydroxy-6-3-2-2-(sulfooxy)ethylsulfonylethylaminocarbonylphenylazo-3-4-2-(sulfooxy)ethylsulfonylphenylazo-, tetrasodium salt is a high-purity, water-soluble polyazo dye intermediate characterized by its multiple sulfonate and reactive groups. This compound is engineered to deliver exceptional color strength, brightness, and fiber affinity in demanding dyeing processes. It is primarily required by manufacturers in the textile, leather, and specialty ink industries for producing high-grade reactive and direct dyes.

Application

• Primary intermediate for synthesizing high-performance reactive dyes used on cotton, wool, and nylon.
• Manufacturing of direct dyes for paper and textile applications requiring good wet fastness.
• Key component in the production of leather dyes, providing deep, uniform shades.
• Used in formulating specialty inks for ink-jet printing and security markings.
• Potential use as a biological stain or histochemical agent in laboratory settings.
• Intermediate for research and development of novel functional dyes and pigments.

Basic Information

Product Name	2,7-Naphthalenedisulfonic acid, 4-amino-5-hydroxy-6-3-2-2-(sulfooxy)ethylsulfonylethylaminocarbonylphenylazo-3-4-2-(sulfooxy)ethylsulfonylphenylazo-, tetrasodium salt
CAS No.	116889-78-2
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	C.I. Reactive Black 5 (tetrasodium salt); Reactive Black 5; Remazol Black B; Tetrasodium 4-amino-5-hydroxy-3,6-bis((4-((2-(sulfonatooxy)ethyl)sulfonyl)phenyl)azo)naphthalene-2,7-disulfonate; Lanasol Black B; Sumifix Black B; Drimarene Black B; 2,7-Naphthalenedisulfonic acid, 4-amino-5-hydroxy-6-[2-[2-[2-[(2-hydroxyethyl)sulfonyl]ethoxy]ethyl]sulfonyl]phenyl]azo]-3-[[4-[(2-sulfooxyethyl)sulfonyl]phenyl]azo]-, tetrasodium salt
EINECS	Contact for details

Quality Control

Our production of this dye intermediate adheres to stringent quality management systems. Every batch is analyzed to ensure consistent purity, color value, and reactivity. Certificates of Analysis (COA) detailing key parameters such as assay, impurity profile, and solubility are provided and available upon request to support your quality assurance protocols.

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); the container must be kept tightly sealed in a dry environment to prevent absorption of moisture and caking.

Specification

Item	Specification
Appearance	Dark blue to black powder or granules
Identification (IR)	Conforms to structure
Assay (HPLC)	Min. 90%
Moisture Content	Max. 5.0%
Water Solubility	Completely soluble
pH (1% Solution)	6.0 - 8.0
Heavy Metals (as Pb)	Max. 20 ppm

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