Description

4-Hydroxy-1-Naphthoic Acid is a versatile naphthalene derivative that serves as a crucial organic intermediate and building block in advanced synthesis. Its bifunctional structure, featuring both a carboxylic acid and a phenolic hydroxyl group, makes it valuable for constructing complex molecules and functional materials. This compound is essential for manufacturers and R&D teams in the pharmaceutical, agrochemical, and specialty chemical industries seeking to develop new active ingredients or high-performance additives.

Application

• Pharmaceutical Intermediate: Key starting material or building block in the synthesis of various active pharmaceutical ingredients (APIs), particularly those with naphthalene-based structures.
• Agrochemical Synthesis: Used in the production of advanced herbicides, fungicides, and plant growth regulators.
• Dye and Pigment Manufacturing: Serves as a precursor for azo dyes, lake pigments, and other colorants requiring high lightfastness and stability.
• Polymer Additives: Acts as a monomer or stabilizer in the production of engineering plastics and high-performance polymers.
• Liquid Crystal & OLED Materials: Utilized in the synthesis of organic electronic materials for displays and lighting applications.
• Chemical Research & Development: A valuable reagent in organic synthesis for constructing complex molecular architectures in academic and industrial labs.
• Metal Chelation & Corrosion Inhibition: Employed in formulations for water treatment and metal surface protection due to its chelating properties.

Basic Information

Product Name	4-Hydroxy-1-Naphthoic Acid
CAS No.	7474-97-7
Molecular Formula	C11H8O3
Molecular Weight	188.18 g/mol
Synonyms	1-Naphthol-4-carboxylic Acid; 4-Carboxy-1-naphthol; 1-Hydroxy-4-naphthoic Acid; 4-Hydroxynaphthalene-1-carboxylic Acid; NSC 403697; 4-HNA
EINECS	231-267-7

Quality Control

Our 4-Hydroxy-1-Naphthoic Acid is manufactured under a strict quality management system. Every batch undergoes comprehensive analytical testing to ensure it meets precise specifications for identity, purity, and impurity profiles. We provide full traceability and Certificates of Analysis (COA) are available for all shipments, confirming compliance with agreed specifications. Our quality commitment supports applications requiring high-purity intermediates, including cGMP manufacturing.

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). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed after opening to prevent absorption of atmospheric moisture, which can affect product quality and handling properties.

Specification

Item	Specification
Appearance	Off-white to light yellow crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Melting Point	245 - 250 °C
Loss on Drying	≤ 1.0%
Heavy Metals (as Pb)	≤ 20 ppm
Residue on Ignition	≤ 0.1%
Related Substances (HPLC)	Individual impurity ≤ 0.5%; Total impurities ≤ 2.0%

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