5-Amino-3-[[4-[[4-[[4-Anilino-2-Hydroxyphenyl]Azo]Phenyl]Amino]-3-Sulphophenyl]Azo]-4-Hydroxynaphthalene-2,7-Disulphonic Acid, Sodium Salt CAS NO 85223-31-0

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CAS No.:85223-31-0

Grade:Pharmacy Grade

Content:99.9%

Brand:Customizable

Packaging:Customizable

Description

5-Amino-3-[[4-[[4-[[4-Anilino-2-Hydroxyphenyl]Azo]Phenyl]Amino]-3-Sulphophenyl]Azo]-4-Hydroxynaphthalene-2,7-Disulphonic Acid, Sodium Salt is a high-purity, complex azo dye intermediate of significant industrial importance. Its intricate molecular structure, featuring multiple azo linkages and sulphonic acid groups, makes it a critical precursor for synthesizing high-performance dyes and pigments. This compound is essential for manufacturers in the textile, ink, and specialty chemical industries seeking to produce vivid, stable colors with specific functional properties.

Application

Primary Intermediate for Reactive Dyes: A key building block in the synthesis of high-quality reactive dyes for cotton and other cellulosic fibers, providing excellent wash and light fastness.
Production of Acid Dyes: Used in manufacturing acid dyes for wool, silk, and nylon, offering a range of bright and deep shades.
Specialty Pigment Synthesis: Serves as a precursor for creating complex organic pigments used in high-performance inks, coatings, and plastics.
Functional Dye Manufacturing: Employed in the production of dyes for specialized applications, including paper coloring and leather finishing.
Research & Development: Utilized in chemical R&D laboratories for developing novel chromophores and studying structure-property relationships in dye chemistry.

Basic Information

Item	Details
Product Name	5-Amino-3-[[4-[[4-[[4-Anilino-2-Hydroxyphenyl]Azo]Phenyl]Amino]-3-Sulphophenyl]Azo]-4-Hydroxynaphthalene-2,7-Disulphonic Acid, Sodium Salt
CAS No.	85223-31-0
Molecular Formula	C40H28N8O11S3Na2 (or similar, based on sodium salt form)
Molecular Weight	Contact for details
Synonyms	5-Amino-4-hydroxy-3-[[4-[[4-[(4-anilino-2-hydroxyphenyl)azo]phenyl]amino]-3-sulfophenyl]azo]naphthalene-2,7-disulfonic acid disodium salt; C.I. Reactive Black 5 Intermediate; Azo Dye Intermediate for Reactive Black 5; Disodium 5-amino-3-[[4-[[4-[(4-anilino-2-hydroxyphenyl)azo]phenyl]amino]-3-sulfophenyl]azo]-4-hydroxynaphthalene-2,7-disulfonate; Reactive Dye Precursor 85223-31-0; Complex Azo Dye Intermediate
EINECS	Contact for details

Quality Control

Our production of this advanced dye intermediate adheres to strict quality management systems. Every batch undergoes comprehensive analytical testing, including HPLC for purity and isomer content, spectrophotometry for strength, and titration for functional group analysis, to ensure consistency and performance in downstream synthesis. A detailed Certificate of Analysis (COA) is provided with each shipment, confirming compliance with agreed specifications.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept sealed to prevent absorption of atmospheric moisture, which can affect product quality and handling properties.

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
Related Substances (HPLC)	Total impurities: Max. 5.0%