Description

2,7-Naphthalenedisulfonic Acid, 6-Amino-4-Hydroxy-3-7-Sulfo-4-(4-Sulfophenyl)Azo-1-Naphthalenylazo-, Compd. With 2,2,2-Nitrilotrisethanol (1:4) is a high-purity, water-soluble azo dye intermediate and complex salt. This compound is valued for its precise chemical structure, which provides excellent chromophoric properties and stability for demanding synthesis processes. It is primarily required by manufacturers in the specialty dyes and pigments industry, as well as for research and development in advanced material science.

Application

• Primary Intermediate for Reactive Dyes: Key building block in the synthesis of high-performance reactive dyes for textiles, particularly cotton and cellulose fibers.
• Specialty Pigment Manufacturing: Used in the production of complex organic pigments requiring high color strength and lightfastness.
• Functional Dye Synthesis: Serves as a precursor for dyes used in ink-jet printing, leather coloring, and paper coloration.
• Research & Development: Utilized in academic and industrial R&D for developing new chromophores and studying azo dye chemistry.
• Analytical Chemistry: May be employed as a staining agent or colorimetric indicator in specific analytical methodologies.

Basic Information

Product Name	2,7-Naphthalenedisulfonic Acid, 6-Amino-4-Hydroxy-3-7-Sulfo-4-(4-Sulfophenyl)Azo-1-Naphthalenylazo-, Compd. With 2,2,2-Nitrilotrisethanol (1:4)
CAS No.	111363-58-7
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	C.I. Reactive Black 5, tetraethanolammonium salt; Reactive Black 5, TEA salt; 6-Amino-4-hydroxy-3-[[4-[(2-sulfophenyl)azo]-7-sulfo-1-naphthalenyl]azo]-5-[[4-[(2-sulfophenyl)azo]-7-sulfo-2-naphthalenyl]azo]-2,7-naphthalenedisulfonic acid, compound with 2,2',2''-nitrilotris[ethanol] (1:4); Reactive Black B (TEA salt); Remazol Black B (TEA salt); Sumifix Black B (TEA salt)
EINECS	Contact for details

Quality Control

Our production of this specialty chemical adheres to strict quality management systems. Every batch is analyzed to ensure consistent purity, color strength, and chemical composition. A comprehensive Certificate of Analysis (COA) detailing parameters such as assay, impurity profile, and solubility is provided with each shipment to guarantee it meets your specific application 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). This product is hygroscopic (moisture-sensitive); ensure the container is kept tightly sealed to prevent absorption of atmospheric moisture which may affect product performance.

Specification

Item	Specification
Appearance	Dark blue to black powder or granules
Identification (IR)	Conforms to structure
Assay (HPLC)	Min. 95%
Water Solubility	Freely soluble
Loss on Drying	Max. 5.0%
Sulfated Ash	Max. 1.0%
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.