Description

Naphthol As-Br C.I. 37575 is a high-purity azoic coupling component and a key intermediate in the synthesis of organic pigments and dyes. This compound is valued for its ability to produce vivid, lightfast shades, particularly in the red and maroon color spectrum, when coupled with stabilized diazonium salts. It is an essential raw material for manufacturers in the textile, ink, and plastics coloration industries who require consistent quality and reliable performance in their final products.

Application

• Primary use as a coupling component in the production of azo pigments for printing inks.
• Manufacture of high-performance organic pigments used in plastics and synthetic fibers.
• Production of disperse dyes and other colorants for the textile industry.
• Used in the synthesis of specialized dyes for leather finishing.
• Intermediate in research and development of novel colorants and functional dyes.
• Potential use in the formulation of color filters for electronic displays.

Basic Information

Product Name	Naphthol As-Br C.I. 37575
CAS No.	91-92-9
Molecular Formula	C17H13BrN2O2
Molecular Weight	357.20 g/mol
Synonyms	2-Hydroxy-3-naphthanilide; 3-Hydroxy-N-phenyl-2-naphthamide; Naphthol AS-BR; C.I. Azoic Coupling Component 17; Azoic Coupling Component 17; Naphthol AS-Br; 2-Naphthol, 3-hydroxy-N-phenyl-; Naphthol ASBR
EINECS	202-107-5

Quality Control

Our Naphthol As-Br C.I. 37575 is manufactured under a stringent quality management system to ensure batch-to-batch consistency and high purity. Every lot is tested against rigorous in-house specifications, which typically include identity confirmation by IR spectroscopy, purity assay by HPLC, and control of key impurities. A Certificate of Analysis (COA) detailing all test results is provided with each shipment 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 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 to reference spectrum
Assay (HPLC)	≥ 98.0%
Melting Point	243 - 247 °C
Loss on Drying	≤ 0.5%
Ash Content	≤ 0.3%

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