Description

4-[(2-Hydroxy-1-Naphthyl)Azo]Benzenesulphonic Acid is a synthetic azo compound primarily used as a key intermediate in the production of high-performance dyes and pigments. Its molecular structure provides excellent chromophoric properties, making it valuable for creating vivid and stable colors. This chemical is essential for manufacturers in the textile, ink, and specialty chemical industries seeking to develop or produce azo dyes with specific shades and enhanced fastness properties.

Application

• Primary Intermediate for Azo Dyes & Pigments: Serves as a crucial building block in the synthesis of orange, red, and brown azo dyes for textiles, leather, and paper.
• Textile Dye Manufacturing: Used to produce dyes for coloring natural and synthetic fibers, valued for color strength and application properties.
• Ink Formulation: Incorporated into the production of pigments for printing inks, including those used in packaging and publications.
• Research & Development: Employed in chemical R&D labs for developing new dye structures, studying azo coupling reactions, and analytical method development.
• Specialty Chemical Synthesis: Acts as a precursor for more complex chemical entities in organic synthesis and fine chemical production.

Basic Information

Product Name	4-[(2-Hydroxy-1-Naphthyl)Azo]Benzenesulphonic Acid
CAS No.	573-89-7
Molecular Formula	C₁₆H₁₂N₂O₄S
Molecular Weight	328.34 g/mol
Synonyms	Benzenesulfonic acid, 4-[(2-hydroxy-1-naphthalenyl)azo]-; C.I. 15510; Acid Orange 7 intermediate; 4-[(2-Hydroxy-1-naphthyl)azo]benzenesulfonic acid; 1-(4-Sulfophenylazo)-2-naphthol; Orange II intermediate; 4-(2-Hydroxy-1-naphthylazo)benzenesulfonic acid
EINECS	209-358-4

Quality Control

Our production of 4-[(2-Hydroxy-1-Naphthyl)Azo]Benzenesulphonic Acid adheres to stringent quality management protocols. Each batch undergoes comprehensive analytical testing, including assay, identification, and impurity profiling, to ensure consistency and meet customer specifications. Certificates of Analysis (COA) documenting purity, physical characteristics, and test results are provided with every shipment and are available upon request.

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 minimize exposure to atmospheric humidity.

Specification

Item	Specification
Appearance	Orange to red-brown powder or crystalline solid
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.