Description

2-Naphthalenesulfonic acid, 6-[(2,4-diamino-5-sulfophenyl)azo]-4-hydroxy-3-[[4-[[4-[[1-hydroxy-7-[[4-hydroxy-2-[(2-methylphenyl)amino]phenyl]azo]-3-sulfo-2-naphthalenyl]azo]phenyl]amino]-3-sulfophenyl]azo]-, tetrasodium salt is a complex, high-purity azo dye intermediate of significant industrial importance. This compound is valued for its role in synthesizing specialized dyes and pigments with enhanced color fastness and specific optical properties. It is primarily required by manufacturers in the textile, ink, and specialty chemical sectors for producing high-performance colorants.

Application

• Primary Intermediate for Reactive Dyes: A key building block in the synthesis of high-grade reactive dyes used for coloring cotton, wool, and other natural fibers.
• Specialty Pigment Manufacturing: Used in the production of complex organic pigments for applications requiring high stability and specific hues.
• Inkjet and Digital Printing Inks: Serves as a precursor for dyes used in high-quality inks, where color purity and consistency are critical.
• Functional Dyes for Non-Textile Uses: Potential applications in the development of dyes for lasers, optical data storage, or as biological stains.
• Research & Development: Utilized in chemical R&D for creating novel chromophores and studying structure-property relationships in dye chemistry.

Basic Information

Item	Detail
Product Name	2-Naphthalenesulfonic acid, 6-[(2,4-diamino-5-sulfophenyl)azo]-4-hydroxy-3-[[4-[[4-[[1-hydroxy-7-[[4-hydroxy-2-[(2-methylphenyl)amino]phenyl]azo]-3-sulfo-2-naphthalenyl]azo]phenyl]amino]-3-sulfophenyl]azo]-, tetrasodium salt
CAS No.	93777-10-7
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	C.I. Reactive Black 5 (tetrasodium salt); Reactive Black 5; Tetrasodium 4-amino-5-hydroxy-3-[[4-[[4-[[1-hydroxy-7-[(2-methylphenyl)amino]-3-sulfo-2-naphthyl]azo]phenyl]amino]-3-sulfophenyl]azo]-6-(phenylazo)naphthalene-2,7-disulfonate; Remazol Black B (tetrasodium salt); C.I. 20505; Reactive Black B; Complex azo dye intermediate (tetrasodium salt form)
EINECS	Contact for details

Quality Control

Our production of this advanced dye intermediate adheres to stringent quality control protocols to ensure batch-to-batch consistency and purity for demanding synthesis applications. Quality is verified through modern analytical techniques including HPLC and spectrophotometry. A comprehensive Certificate of Analysis (COA) detailing purity, impurity profile, and physical specifications is provided with every shipment.

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). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed after opening to prevent absorption of atmospheric moisture, which can affect product performance.

Specification

Item	Specification
Appearance	Dark powder or granules
Identification (IR)	Conforms to structure
Assay (HPLC)	Min. 95%
Moisture Content	Max. 5.0%
Solubility (in Water)	Completely soluble
Heavy Metals (as Pb)	Max. 20 ppm
pH (1% Solution)	7.0 - 9.0

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