Description

7-Hydroxynaphthalene-2-Sulphonic Acid is a key naphthalene derivative and an important organic intermediate. This compound is valued for its bifunctional nature, featuring both a phenolic hydroxyl group and a sulphonic acid group, which makes it a versatile building block for more complex molecules. It is primarily sought after by manufacturers in the dye, pigment, and specialty chemical industries for synthesis and production processes.

Application

• Dye and Pigment Intermediate: A crucial precursor in the synthesis of azo dyes, acid dyes, and organic pigments, contributing to color strength and fastness properties.
• Pharmaceutical Synthesis: Used as a building block in the manufacture of certain active pharmaceutical ingredients (APIs) and diagnostic agents.
• Chemical Research & Development: Serves as a versatile starting material or reagent in organic synthesis for creating novel compounds.
• Surfactant and Detergent Industry: Can be utilized in the production of specialized surfactants due to its sulphonic acid functionality.
• Photographic Chemicals: Employed in the synthesis of certain chemicals used in photographic development.
• Corrosion Inhibitor Formulation: Acts as a component in formulations designed to prevent metal corrosion.

Basic Information

Product Name	7-Hydroxynaphthalene-2-Sulphonic Acid
CAS No.	92-40-0
Molecular Formula	C₁₀H₈O₄S
Molecular Weight	224.23 g/mol
Synonyms	2-Naphthol-7-sulfonic Acid; 7-Hydroxy-2-naphthalenesulfonic Acid; 2-Hydroxy-7-naphthalenesulfonic Acid; F Acid; Bayer's Acid; 7-Hydroxynaphthalene-2-sulfonic Acid; 7-Hydroxy-2-naphthalenesulphonic Acid; 2,7-Acid
EINECS	202-154-5

Quality Control

Our 7-Hydroxynaphthalene-2-Sulphonic Acid is produced under a strict quality management system. Each batch undergoes comprehensive analytical testing to ensure it meets precise chemical and physical specifications. Certificates of Analysis (COA) documenting purity, identity, and impurity profiles are available upon request 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. Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed to prevent absorption of atmospheric moisture. Keep away from strong acids and organic solvents.

Specification

Item	Specification
Appearance	Off-white to light brown crystalline powder
Identification (IR)	Conforms
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 2.0%
Sulfated Ash	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm

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