Description

Naphthol As-Rs CAS NO 5165-81-1 is a specialized naphthol derivative widely used as a key intermediate in the synthesis of high-performance pigments and dyes. Its chemical structure provides excellent coupling properties, making it essential for producing vivid and stable colorants. This product is primarily sought by manufacturers in the pigment, dye, and specialty chemical industries for applications requiring superior color strength and fastness properties.

Application

• Primary intermediate for the synthesis of azo pigments and dyes.
• Coupling component in the production of high-performance organic pigments for plastics, inks, and coatings.
• Used in the manufacture of colorants for textiles and leather.
• Key raw material for specialty dyes in the paper industry.
• Intermediate in the synthesis of certain liquid crystal materials.
• Research and development of novel photographic chemicals.
• Production of toners for printing and imaging.

Basic Information

Product Name	Naphthol As-Rs
CAS No.	5165-81-1
Molecular Formula	C₁₇H₁₃NO₂
Molecular Weight	263.29 g/mol
Synonyms	2-Hydroxy-3-naphthoic acid anilide; 3-Hydroxy-2-naphthanilide; Naphthol AS-RS; Naphthol ASRS; C.I. Azoic Coupling Component 13; Azoic Coupling Component 13; Naphthol AS-RS (C.I. 37520); N-(3-Hydroxy-2-naphthoyl)aniline; 2-Hydroxy-N-phenyl-3-naphthamide
EINECS	225-931-8

Quality Control

Our Naphthol As-Rs is manufactured under strict quality control protocols to ensure batch-to-batch consistency and high purity. The product undergoes comprehensive analytical testing, including HPLC for assay and identification. Certificates of Analysis (COA) detailing purity, physical characteristics, and impurity profiles are provided with each shipment to guarantee compliance with your technical requirements.

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 heat sources and incompatible materials. Due to its light-sensitive nature, prolonged exposure to direct light should be avoided.

Specification

Item	Specification
Appearance	Off-white to light beige powder
Identification (IR)	Conforms
Assay (HPLC)	≥ 98.0%
Melting Point	243 - 247 °C
Loss on Drying	≤ 0.5%
Ash Content	≤ 0.5%

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