Description

3-Hydroxy-2-Naphthoyl Chloride is a key organic intermediate and acid chloride derivative of 3-hydroxy-2-naphthoic acid. This compound matters for its high reactivity, serving as a crucial building block for synthesizing more complex molecules, particularly azo dyes and pigments. Industries that need it include manufacturers of dyes, pigments, liquid crystal polymers, and pharmaceutical active ingredients, where it is valued for introducing the naphthoyl moiety into target structures.

Application

• Azo Dye and Pigment Synthesis: Primary use as a coupling component for producing high-performance, light-fast azo pigments and dyes, such as Pigment Red and various naphthol AS series pigments.
• Liquid Crystal Polymer (LCP) Production: Acts as a monomeric unit in the synthesis of aromatic polyesters and other polymers for high-temperature engineering plastics and liquid crystal displays.
• Pharmaceutical Intermediates: Used in the synthesis of specific active pharmaceutical ingredients (APIs) and diagnostic agents that require the naphthalene backbone.
• Organic Synthesis & Research: Serves as a versatile reagent in academic and industrial R&D for introducing the 3-hydroxy-2-naphthoyl group via amidation or esterification reactions.
• Agrochemicals: Intermediate in the production of certain herbicides and plant growth regulators.
• Functional Materials: Building block for creating organic semiconductors, photoconductors, and other advanced functional materials.

Basic Information

Product Name	3-Hydroxy-2-Naphthoyl Chloride
CAS No.	1734-00-5
Molecular Formula	C11H7ClO2
Molecular Weight	206.63 g/mol
Synonyms	3-Hydroxynaphthalene-2-carbonyl chloride; 2-Naphthol-3-carbonyl chloride; 3-Hydroxy-2-naphthoic acid chloride; β-Hydroxynaphthoyl chloride; 2-Carboxy-3-hydroxynaphthalene chloride; 3-Hydroxy-2-naphthoylchloride; 3-Hydroxy-2-naphthoic chloride; 2-Hydroxy-3-naphthoyl chloride (common alternate numbering)
EINECS	217-076-4

Quality Control

Our 3-Hydroxy-2-Naphthoyl Chloride is produced under stringent quality management systems. Each batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation by FT-IR and melting point, to ensure it meets exacting standards for use in sensitive applications like pigment and pharmaceutical synthesis. A Certificate of Analysis (COA) detailing all specifications is provided with every shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated place at a controlled room temperature (15-25°C). Due to its hygroscopic and moisture-sensitive nature, the container must be kept tightly sealed under an inert atmosphere (e.g., nitrogen or argon) to prevent hydrolysis. Keep away from strong bases, oxidizing agents, and sources of ignition.

Specification

Item	Specification
Appearance	Light yellow to beige crystalline powder
Identification (IR)	Conforms to structure
Melting Point	148°C - 152°C
Assay (HPLC)	≥ 98.5%
Related Substances (HPLC)	Total impurities ≤ 1.5%
Water Content (KF)	≤ 0.5%

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