Description

Benzenesulfonic Acid, 5-Amino-2-[(4-Aminophenyl)Amino]-, Diazotized, Coupled With 5,5'-[Oxybis[(5-Hydroxy-3,1-Phenylene)Oxy]]Bis[1,3-Benzenediol], Sodium Salt is a complex, high-purity synthetic dye intermediate. This compound is valued for its role in producing vivid and stable colorants, particularly in demanding technical applications. It is primarily needed by manufacturers in the textile, specialty ink, and advanced materials sectors seeking consistent performance and batch-to-batch reliability.

Application

• Textile Dyeing: A key intermediate for the synthesis of high-performance azo dyes used on natural and synthetic fibers.
• Specialty Inks: Used in the formulation of industrial inks for printing, marking, and coding applications requiring specific color fastness.
• Functional Dyes: Serves as a precursor for dyes used in non-textile applications, such as in lasers, optical data storage, or liquid crystal displays (LCDs).
• Research & Development: Employed in chemical research for developing novel chromophores and studying dye chemistry.
• Pigment Manufacturing: Can be utilized in the production process of certain organic pigments.
• Analytical Chemistry: May be used as a reagent or standard in specific colorimetric analytical methods.

Basic Information

Product Name	Benzenesulfonic Acid, 5-Amino-2-[(4-Aminophenyl)Amino]-, Diazotized, Coupled With 5,5'-[Oxybis[(5-Hydroxy-3,1-Phenylene)Oxy]]Bis[1,3-Benzenediol], Sodium Salt
CAS No.	97675-32-6
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	C.I. Reactive Black 5 (principal commercial name); Sodium 4-amino-5-hydroxy-3-[[4-[[2-(sulfoxy)ethyl]sulfonyl]phenyl]azo]-6-(phenylamino)-2,7-naphthalenedisulfonate; Remazol Black B; Reactive Black 5; Levafix Black E-B; Sumifix Black B; Dianix Black BG-FS; Procion Black H-EXL
EINECS	Contact for details

Quality Control

Our production of this dye intermediate adheres to stringent quality control protocols to ensure purity, consistency, and performance for industrial applications. Each batch is analyzed using advanced techniques like HPLC to verify critical parameters. A comprehensive Certificate of Analysis (COA) detailing assay, impurity profile, and physical specifications is provided with every shipment to guarantee traceability and compliance with your specifications.

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
Identification (IR)	Conforms to standard
Assay (HPLC)	Min. 95%
Moisture Content	Max. 5.0%
Water Solubility	Completely soluble
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.