Description

4-Hydroxy-1-Naphthalenesulfonic Acid is a key organic intermediate and sulfonating agent, valued for its ability to introduce both sulfonic acid and naphthol functional groups into target molecules. This compound is essential for synthesizing a wide range of specialty chemicals, including dyes, pigments, and pharmaceutical intermediates. It is primarily utilized by manufacturers in the fine chemical, agrochemical, and research & development sectors seeking to build complex aromatic structures.

Application

• Dye and Pigment Intermediate: A crucial building block for the synthesis of azo dyes, acid dyes, and other colorants.
• Pharmaceutical Synthesis: Used as a key intermediate in the production of certain active pharmaceutical ingredients (APIs) and diagnostic agents.
• Agrochemical Manufacturing: Serves as a precursor in the synthesis of herbicides, pesticides, and plant growth regulators.
• Chemical Research & Development: Employed in organic synthesis for introducing sulfonic acid groups onto naphthalene frameworks.
• Surfactant and Detergent Industry: Can be used to develop specialized surfactants with specific solubility and surface-active properties.
• Photographic Chemicals: Acts as a component in the formulation of certain photographic developers and chemicals.

Basic Information

Product Name	4-Hydroxy-1-Naphthalenesulfonic Acid
CAS No.	304671-69-0
Molecular Formula	C10H8O4S
Molecular Weight	224.23 g/mol
Synonyms	1-Naphthalenesulfonic acid, 4-hydroxy-; 4-Hydroxynaphthalene-1-sulfonic acid; 1,4-Naphtholsulfonic acid; 4-Hydroxy-1-naphthalenesulphonic acid; 1-Naphthol-4-sulfonic acid; NSC 403779; 4-Hydroxy-1-naphthalene sulfonic acid
EINECS	Contact for details

Quality Control

Our 4-Hydroxy-1-Naphthalenesulfonic Acid is produced under strict quality management protocols. Each batch undergoes rigorous analytical testing to ensure identity, purity, and consistency. A comprehensive Certificate of Analysis (COA) detailing specifications such as assay, impurity profile, and physical characteristics is provided with every shipment to guarantee compliance with your technical requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). This material is hygroscopic (moisture-sensitive) and should be kept under dry conditions to prevent caking or decomposition. Keep away from strong bases and oxidizing agents.

Specification

Item	Specification
Appearance	Off-white to light brown powder or crystals
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 2.0%
Residue on Ignition (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.