Description

4,7-Dihydroxynaphthalene-2-Sulphonic Acid, Sodium Salt is a high-purity, water-soluble naphthalene derivative that serves as a versatile intermediate in advanced chemical synthesis. Its bifunctional structure, featuring both hydroxyl and sulfonate groups, makes it a critical building block for creating specialized dyes, pigments, and functional materials. This compound is essential for manufacturers and R&D laboratories in the fine chemical, pharmaceutical, and specialty dye industries seeking reliable, high-quality intermediates for complex synthesis.

Application

• Dye and Pigment Intermediate: A key precursor in the synthesis of acid dyes, reactive dyes, and azo pigments, particularly for textiles and inks.
• 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 intermediate in organic synthesis for creating novel compounds with specific functional properties.
• Photographic Chemicals: Can be utilized in the formulation of certain photographic developers and sensitizers.
• Analytical Reagent: Employed as a reagent or standard in analytical chemistry and chromatography.
• Functional Material Production: Acts as a monomer or modifier in the synthesis of polymers and materials with specific ionic or chromophoric characteristics.

Basic Information

Product Name	4,7-Dihydroxynaphthalene-2-Sulphonic Acid, Sodium Salt
CAS No.	94232-29-8
Molecular Formula	C10H7NaO6S
Molecular Weight	278.21 g/mol
Synonyms	2,7-Dihydroxynaphthalene-5-sulfonic acid sodium salt; 4,7-Dihydroxy-2-naphthalenesulfonic acid sodium salt; Sodium 4,7-dihydroxynaphthalene-2-sulfonate; 5-Sulfo-2,7-dihydroxynaphthalene sodium salt; 2,7-Dihydroxy-5-naphthalenesulfonic acid sodium salt; 4,7-Dihydroxy-2-naphthalenesulfonate sodium; 2-Naphthalenesulfonic acid, 4,7-dihydroxy-, monosodium salt
EINECS	Contact for details

Quality Control

Our 4,7-Dihydroxynaphthalene-2-Sulphonic Acid, Sodium Salt is manufactured under a stringent quality management system. Each batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure it meets exacting specifications. A Certificate of Analysis (COA) detailing all test results is provided with every shipment to guarantee traceability and compliance with your quality requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at a controlled room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed after opening to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	Off-white to light tan powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 2.0%
Heavy Metals (as Pb)	≤ 20 ppm
Residue on Ignition (Sulfated Ash)	Contact for details

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