Description

1-Hydroxy-7-Sulfo-2-Naphthoic Acid is a high-purity, functionalized naphthalene derivative that serves as a critical intermediate in advanced chemical synthesis. Its unique structure, featuring both a hydroxyl and a sulfonic acid group on the naphthalene ring, makes it a versatile building block for creating complex molecules with specific properties. This compound is essential for manufacturers in the dye, pigment, and specialty chemical industries seeking to develop products with enhanced color fastness, solubility, or biological activity.

Application

• Dye and Pigment Intermediate: A key precursor in the synthesis of azo dyes, acid dyes, and reactive dyes, contributing to color intensity and stability.
• Pharmaceutical Intermediate: Used in the research and development of active pharmaceutical ingredients (APIs), particularly those with naphthalene-based structures.
• Liquid Crystal & OLED Material Synthesis: Serves as a building block for advanced organic electronic materials due to its planar, conjugated system and functional groups.
• Complexing Agent & Chelator: Utilized in analytical chemistry and water treatment formulations for its metal-chelating properties.
• Corrosion Inhibitor Formulation: Incorporated into specialty chemical blends to protect metal surfaces in industrial processes.
• Research & Development: Employed in academic and industrial R&D labs for novel organic synthesis and material science projects.

Basic Information

Product Name	1-Hydroxy-7-Sulfo-2-Naphthoic Acid
CAS No.	6407-91-6
Molecular Formula	C11H8O6S
Molecular Weight	268.24 g/mol
Synonyms	7-Sulfo-1-hydroxy-2-naphthoic acid; 1-Hydroxy-2-naphthoic acid-7-sulfonic acid; 2-Naphthoic acid, 1-hydroxy-7-sulfo-; 1-Hydroxy-2-naphthalenecarboxylic acid 7-sulfonic acid; 1-Hydroxy-7-sulfonaphthalene-2-carboxylic acid; 7-Hydroxy-8-sulfo-1-naphthoic acid (tautomer); HSN Acid; 1-Hydroxy-7-sulpho-2-naphthoic acid
EINECS	229-077-3

Quality Control

Our 1-Hydroxy-7-Sulfo-2-Naphthoic Acid is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure it meets precise specifications for purity, identity, and composition. We provide comprehensive Certificates of Analysis (COA) with each shipment, detailing key parameters such as assay, impurity profile, and physical characteristics. Our quality commitment ensures batch-to-batch consistency for your critical processes.

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). This product is hygroscopic (moisture-sensitive); the container must be kept tightly sealed 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%
Loss on Drying	≤ 2.0%
Sulfated Ash	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Total impurities ≤ 2.0%

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