Description

2-[(4,5-Diamino-1-Naphthyl)Azo]-5-Nitrobenzenesulphonic Acid CAS NO 93892-21-8 is a specialized azo dye intermediate characterized by its naphthyl and nitro-substituted aromatic structure. This compound is critical for synthesizing high-value, complex dyes and pigments that require specific color fastness and stability properties. It is primarily needed by manufacturers in the textile, ink, and specialty chemical industries for producing advanced colorants.

Application

• Primary Intermediate for Azo Dyes: Serves as a key building block in the synthesis of complex, high-performance azo dyes for textiles and leather.
• Specialty Pigment Manufacturing: Used in the production of organic pigments for inks, coatings, and plastics where specific hue and durability are required.
• Research & Development: Employed in chemical R&D for developing novel chromophores and functional dyes with unique optical properties.
• Analytical Reagent: Can be utilized as a reagent or standard in analytical chemistry for method development and calibration.

Basic Information

Product Name	2-[(4,5-Diamino-1-Naphthyl)Azo]-5-Nitrobenzenesulphonic Acid
CAS No.	93892-21-8
Molecular Formula	C16H12N6O5S
Molecular Weight	400.37 g/mol
Synonyms	5-Nitro-2-[(4,5-diamino-1-naphthyl)azo]benzenesulfonic Acid; 2-[(4,5-Diamino-1-naphthalenyl)azo]-5-nitrobenzenesulfonic Acid; Benzenesulfonic acid, 2-[(4,5-diamino-1-naphthalenyl)azo]-5-nitro-; C.I. 37120; Azoic Diazo Component 21; 93892-21-8 (CAS)
EINECS	Contact for details

Quality Control

Our production of 2-[(4,5-Diamino-1-Naphthyl)Azo]-5-Nitrobenzenesulphonic Acid adheres to stringent quality management protocols. Every batch undergoes rigorous analytical testing to ensure identity, purity, and consistency meet the high standards required for industrial synthesis. Certificates of Analysis (COA) detailing specific batch results are available upon request to support your quality assurance and regulatory compliance needs.

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 sealed to prevent degradation from atmospheric moisture.

Specification

Item	Specification
Appearance	Dark brown to reddish-brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 2.0%
Heavy Metals (as Pb)	≤ 20 ppm
Residue on Ignition	≤ 0.5%

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