Description

Naphthol As-Lt CAS NO 3689-20-1 is a specialized azoic coupling component belonging to the naphthol AS series, valued for its ability to form insoluble azo pigments directly on fibers. This compound is a critical intermediate for producing vivid and wash-fast colorants, particularly in shades of red and maroon. It is primarily required by manufacturers in the textile dyeing and printing industries, as well as by producers of pigments for inks, paints, and plastics.

Application

• Textile Dyeing & Printing: As a key coupling agent in the production of insoluble azo dyes for cotton, rayon, and other cellulosic fibers, providing excellent wash and light fastness.
• Organic Pigment Synthesis: Serves as a crucial intermediate in manufacturing high-performance azo pigments used in industrial applications.
• Ink Manufacturing: Used to produce pigments for printing inks, including packaging and publication inks, due to its color strength and stability.
• Paint and Coating Formulation: Imparts durable coloration to architectural and industrial paints.
• Plastics and Masterbatch Coloring: Employed for coloring a variety of plastic polymers, ensuring good dispersion and heat stability.
• Leather Finishing: Used in dye formulations for leather to achieve deep, penetrating colors.
• Research & Development: Serves as a standard or reagent in chemical research for developing new dyes and organic compounds.

Basic Information

Product Name	Naphthol As-Lt
CAS No.	3689-20-1
Molecular Formula	C₁₉H₁₅NO₃
Molecular Weight	305.33 g/mol
Synonyms	3-Hydroxy-2-naphthoic acid 2-methoxyanilide; 3-Hydroxy-N-(2-methoxyphenyl)-2-naphthamide; Naphthol AS-LT; C.I. Azoic Coupling Component 18; Azoic Coupling Component 18; Naphthol AS Light; Naphthol AS-LT (C.I. 37550); 2-Methoxy-3-hydroxy-2'-naphthanilide
EINECS	222-989-5

Quality Control

Our Naphthol As-Lt is manufactured under strict quality control protocols to ensure batch-to-batch consistency and high purity, typically exceeding 98%. Each production lot is analyzed using advanced techniques like HPLC and FTIR. Certificates of Analysis (COA) detailing purity, identity, and impurity profiles are provided and available upon request to support your quality assurance and regulatory needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). Keep away from strong oxidizing agents and incompatible materials.

Specification

Item	Specification
Appearance	Off-white to light beige powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Melting Point	205 - 210 °C
Loss on Drying	≤ 0.5%
Ash Content	≤ 0.3%
Solubility	Soluble in alkaline solutions and organic solvents

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