Description

4-[(2-Hydroxy-1-Naphthyl)Azo]Naphthalenesulphonic Acid is a synthetic azo dye intermediate characterized by its naphthalene-based structure. This compound is valued for its role as a key precursor in the synthesis of high-performance dyes and pigments, offering excellent color fastness and stability. It is primarily required by manufacturers in the textile, ink, and specialty chemical industries for producing vivid and durable colorants.

Application

• Primary intermediate for the synthesis of azo dyes and pigments used in textile coloring.
• Key raw material in the production of printing inks for packaging and publications.
• Used in the manufacture of colorants for plastics and polymeric materials.
• Intermediate for specialty dyes applied in leather and paper industries.
• Potential use in the synthesis of functional dyes for optical and electronic applications.
• Research and development of novel chromogenic compounds in analytical chemistry.

Basic Information

Product Name	4-[(2-Hydroxy-1-Naphthyl)Azo]Naphthalenesulphonic Acid
CAS No.	18268-54-7
Molecular Formula	C₂₀H₁₄N₂O₄S
Molecular Weight	378.40 g/mol
Synonyms	4-[(2-Hydroxy-1-naphthyl)azo]naphthalene-1-sulfonic acid; C.I. 15865; Acid Orange 20 intermediate; 1-Naphthalenesulfonic acid, 4-[(2-hydroxy-1-naphthalenyl)azo]-; 4-(2-Hydroxy-1-naphthylazo)-1-naphthalenesulfonic acid; 4-(2-Hydroxy-1-naphthylazo)naphthalene-1-sulfonic acid; Azo dye intermediate 18268-54-7
EINECS	242-165-0

Quality Control

Our 4-[(2-Hydroxy-1-Naphthyl)Azo]Naphthalenesulphonic Acid is produced under a stringent quality management system. Each batch undergoes rigorous analytical testing to ensure it meets precise chemical and physical specifications. Certificates of Analysis (COA) detailing purity, identity, and impurity profiles are available upon request to support your quality assurance protocols.

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 oxidizing agents and incompatible materials.

Specification

Item	Specification
Appearance	Orange to brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 2.0%
Sulfated Ash	≤ 1.0%
Heavy Metals (as Pb)	≤ 20 ppm

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