Description

Sodium 2-Hydroxynaphthalene-1-Sulphonate is a versatile organic salt widely used as a key intermediate in the synthesis of dyes, pigments, and other fine chemicals. Its significance lies in its role as a coupling agent and a building block for creating complex aromatic sulfonates with specific functional properties. This product is essential for manufacturers in the dyestuff, textile, and specialty chemical industries seeking reliable, high-purity intermediates for their production processes.

Application

• Primary intermediate in the manufacture of azo dyes and pigments for textiles, leather, and plastics.
• Coupling agent in diazo reactions for producing high-value colorants.
• Chemical precursor for synthesizing specialty surfactants and dispersants.
• Intermediate in the production of optical brightening agents (fluorescent whitening agents).
• Used in research and development of pharmaceutical intermediates and agrochemicals.
• Component in analytical chemistry as a reagent or standard.

Basic Information

Product Name	Sodium 2-Hydroxynaphthalene-1-Sulphonate
CAS No.	25059-14-7
Molecular Formula	C10H7NaO4S
Molecular Weight	246.21 g/mol
Synonyms	2-Naphthol-1-sulfonic acid sodium salt; 1-Hydroxy-2-naphthalenesulfonic acid sodium salt; Sodium 1-hydroxy-2-naphthalenesulfonate; 2-Hydroxy-1-naphthalenesulfonic acid sodium salt; Schaeffer's salt sodium salt; Sodium Schaeffer's salt; 2-Naphthol-6-sulfonic acid sodium salt (historical); Oxytone N
EINECS	246-594-9

Quality Control

Our Sodium 2-Hydroxynaphthalene-1-Sulphonate is produced under a stringent quality management system to ensure batch-to-batch consistency and high purity. We provide comprehensive Certificates of Analysis (COA) for every shipment, detailing key parameters such as assay, impurity profile, and physical characteristics. Our quality commitment aligns with industrial and fine chemical standards to meet the specific needs of our global B2B clients.

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 product is hygroscopic (moisture-sensitive); therefore, the container must be kept tightly sealed to prevent absorption of atmospheric moisture, which can affect quality and handling properties.

Specification

Item	Specification
Appearance	Off-white to light beige crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 2.0%
Water Content (Karl Fischer)	≤ 1.5%
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Individual impurity ≤ 0.5%; Total impurities ≤ 2.0%
Solubility (1% in Water)	Clear, yellow solution

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