Description

2-[(4-Hydroxy-1-Naphthyl)Azo]-3,5-Dinitrobenzenesulphonic Acid is a specialized azo dye intermediate characterized by its distinct sulfonic acid and nitro functional groups. This compound is valued for its role in synthesizing high-performance dyes and pigments, offering excellent color fastness and stability in demanding applications. It is primarily sought by manufacturers in the textile, ink, and specialty chemical industries for producing vivid and durable colorants.

Application

• Primary Intermediate for Azo Dyes & Pigments: Serves as a key building block in the synthesis of high-value, complex azo colorants for textiles and plastics.
• Textile Dye Manufacturing: Used to produce dyes for coloring natural and synthetic fibers, particularly where wash-fastness and light-fastness are critical.
• Specialty Ink Formulations: Employed in the development of inks for packaging, security printing, and other high-performance applications.
• Research & Chemical Synthesis: Acts as a valuable reagent in organic synthesis and material science research for creating novel chromophores.
• Analytical Chemistry: Can be utilized as a pH indicator or a complexometric agent in specific laboratory analyses.

Basic Information

Product Name	2-[(4-Hydroxy-1-Naphthyl)Azo]-3,5-Dinitrobenzenesulphonic Acid
CAS No.	31748-47-7
Molecular Formula	C₁₆H₁₀N₄O₈S
Molecular Weight	418.34 g/mol
Synonyms	3,5-Dinitro-2-[(4-hydroxy-1-naphthyl)azo]benzenesulfonic Acid; 2-[(4-Hydroxy-1-naphthalenyl)azo]-3,5-dinitrobenzenesulfonic Acid; C.I. 15865; Acid Orange 20 (related dye class); 1-Naphthol-4-azo-2',4'-dinitrobenzenesulfonic Acid; Benzenesulfonic acid, 2-[(4-hydroxy-1-naphthalenyl)azo]-3,5-dinitro-
EINECS	Contact for details

Quality Control

Our production of 2-[(4-Hydroxy-1-Naphthyl)Azo]-3,5-Dinitrobenzenesulphonic Acid adheres to stringent quality management protocols to ensure batch-to-batch consistency and purity. Each lot undergoes comprehensive analytical testing, including HPLC for assay and purity, and is supplied with a corresponding Certificate of Analysis (COA). We are committed to meeting the specific quality requirements of our industrial partners.

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). Keep away from strong acids and organic solvents. The product is light-sensitive and should be stored away from direct light exposure.

Specification

Item	Specification
Appearance	Orange to brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 2.0%
Sulfated Ash	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm

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