Description

Naphthol As-E CAS NO 92-78-4 is a high-purity naphthol derivative widely used as a key coupling component in the synthesis of azo pigments and dyes. This compound is valued for its ability to produce vibrant, lightfast, and chemically stable colorants essential for demanding industrial applications. It is a critical raw material for manufacturers in the pigments, dyes, textile, and specialty chemical industries seeking consistent quality and performance.

Application

• Primary coupling component for the production of high-performance azo pigments, including reds, oranges, and maroons.
• Manufacture of disperse dyes and other dye classes for coloring synthetic fibers like polyester and acetate.
• Intermediate in the synthesis of organic pigments used in plastics, paints, inks, and coatings.
• Key starting material for research and development of novel colorants and specialty chemicals.
• Used in the production of pigment preparations for masterbatch and compound coloring.

Basic Information

Product Name	Naphthol As-E
CAS No.	92-78-4
Molecular Formula	C₁₈H₁₃NO₂
Molecular Weight	275.30 g/mol
Synonyms	Naphthol AS-E; 3-Hydroxy-N-(2-methoxyphenyl)-2-naphthamide; C.I. Azoic Coupling Component 10; Naphthol ASE; Azoic Coupling Component 10; Naphthol AS/Methoxyanilide; 2-Naphthalenecarboxamide, 3-hydroxy-N-(2-methoxyphenyl)-; N-(2-Methoxyphenyl)-3-hydroxy-2-naphthamide
EINECS	202-188-7

Quality Control

Our Naphthol As-E is manufactured under a strict quality management system to ensure batch-to-batch consistency and high purity. Each lot undergoes comprehensive analytical testing, including assay, identification, and impurity profile analysis. A Certificate of Analysis (COA) detailing all test results is provided with every shipment to guarantee compliance with your specifications.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at room temperature (15-25°C). This product is hygroscopic (moisture-sensitive); keep the container tightly sealed to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	Off-white to light beige powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Melting Point	204°C - 208°C
Loss on Drying	≤ 1.0%
Ash Content	≤ 0.5%

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