Description

1-Naphthol-3,6-Disulfonic Acid Disodium Salt is a high-purity, water-soluble aromatic sulfonate derivative essential for advanced chemical synthesis. This compound serves as a critical intermediate in the production of dyes, pigments, and specialty chemicals, where its disulfonic acid functionality enables precise molecular modifications. It is primarily required by manufacturers in the dye and pigment, pharmaceutical intermediate, and fine chemical industries for creating vivid colors and complex organic molecules.

Application

• Dye and Pigment Intermediate: A key precursor for the synthesis of acid dyes, reactive dyes, and food colorants, contributing to color fastness and brightness.
• Pharmaceutical Synthesis: Used as a building block in the manufacture of certain active pharmaceutical ingredients (APIs) and diagnostic agents.
• Chemical Research & Development: Employed in organic synthesis and catalysis research due to its sulfonic acid groups which can act as directing or activating agents.
• Analytical Reagent: Can be utilized as a standard or reagent in analytical chemistry for method development and calibration.
• Photographic Chemicals: Finds application in the formulation of certain specialty photographic chemicals.
• Textile Auxiliaries: Used in the production of chemicals that improve dyeing processes and fabric treatment.

Basic Information

Product Name	1-Naphthol-3,6-Disulfonic Acid Disodium Salt
CAS No.	20349-39-7
Molecular Formula	C10H6Na2O7S2
Molecular Weight	348.24 g/mol
Synonyms	1-Naphthol-3,6-disulfonic acid sodium salt; 3,6-Dihydroxy-1-naphthalenesulfonic acid disodium salt; Disodium 1-naphthol-3,6-disulfonate; 6-Hydroxy-1-naphthalenesulfonic acid-3-sulfonic acid disodium salt; 1-Naphthol-3,6-disulfonate disodium; Acid Red 1 intermediate; 8-Hydroxynaphthalene-1,3,6-trisulfonic acid (related); Koch's Acid derivative
EINECS	243-751-8

Quality Control

Our 1-Naphthol-3,6-Disulfonic Acid Disodium Salt 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. Certificates of Analysis (COA) detailing the results of tests such as assay, impurity profile, and loss on drying 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 at room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed after each use 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)	≥ 98.0%
Loss on Drying	≤ 2.0%
Sulfated Ash	Contact for details
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Contact for details
Solubility (in Water)	Clear, colorless to faintly colored solution

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