Description

1-Naphthol-3,6-Disulfonic Acid, Sodium Salt is a high-purity, water-soluble aromatic sulfonate derivative. This compound serves as a critical intermediate in the synthesis of dyes, pigments, and specialty chemicals, valued for its ability to introduce sulfonic acid groups and naphthol functionality into target molecules. It is essential for manufacturers in the colorant, pharmaceutical, and fine chemical industries seeking reliable and consistent raw materials for complex synthesis.

Application

• Primary Intermediate for Dyes and Pigments: A key building block in the production of acid dyes, direct dyes, and reactive dyes, particularly for textiles, leather, and paper.
• Chemical Synthesis Reagent: Used in organic synthesis to introduce sulfonic acid groups, enhancing the water solubility and ionic character of target compounds.
• Pharmaceutical Intermediate: Employed in the synthesis of certain active pharmaceutical ingredients (APIs) and diagnostic agents.
• Research & Development: Utilized in laboratory settings for chemical research and the development of new functional materials.
• Specialty Chemical Manufacturing: Acts as a precursor for surfactants, dispersants, and other performance chemicals.

Basic Information

Product Name	1-Naphthol-3,6-Disulfonic Acid, Sodium Salt
CAS No.	79873-37-3
Molecular Formula	C10H6Na2O7S2
Molecular Weight	348.24 g/mol
Synonyms	1-Naphthol-3,6-disulfonic acid disodium salt; 3,6-Dihydroxy-1-naphthalenesulfonic acid disodium salt; Sodium 1-naphthol-3,6-disulfonate; 1-Naphthol-3,6-disulfonate sodium salt; 3,6-Dihydroxynaphthalene-1-sulfonic acid sodium salt; 6-Hydroxy-1-naphthalenesulfonic acid-3-sulfonic acid disodium salt; R Salt (related isomer, often confused); Koch's Acid Salt derivative
EINECS	Contact for details

Quality Control

Our 1-Naphthol-3,6-Disulfonic Acid, Sodium Salt is manufactured under a stringent quality management system. Each batch undergoes rigorous analytical testing to ensure it meets precise specifications for purity, identity, and composition. A comprehensive Certificate of Analysis (COA) documenting results for assay, impurity profile, and other critical parameters is provided with every shipment to guarantee traceability and compliance.

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); 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 beige powder
Identification (IR)	Conforms
Assay (HPLC)	≥ 95.0%
Water Content (KF)	≤ 5.0%
pH (1% Solution)	6.0 - 8.0
Heavy Metals (as Pb)	≤ 20 ppm

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