Description

3-Hydroxynaphthalene-2,7-Disulphonic Acid, Sodium Salt is a high-purity, water-soluble aromatic intermediate essential for the synthesis of dyes and pigments. Its disulphonic acid structure provides excellent solubility and reactivity, making it a key building block for creating vivid and stable colorants. This compound is primarily required by manufacturers in the dye and pigment industry, as well as by research institutions developing advanced functional materials.

Application

• Dye Intermediate: A crucial precursor for the synthesis of acid dyes, direct dyes, and reactive dyes, particularly for textiles like wool, silk, and nylon.
• Pigment Manufacturing: Used in the production of high-performance organic pigments for inks, plastics, and coatings.
• Chemical Synthesis: Serves as a versatile intermediate in organic synthesis for creating more complex sulfonated aromatic compounds.
• Research & Development: Employed in laboratory settings for developing new chromophores and functional dyes with specific optical properties.
• Specialty Chemicals: Potential use in the formulation of optical brighteners and other performance chemicals.

Basic Information

Product Name	3-Hydroxynaphthalene-2,7-Disulphonic Acid, Sodium Salt
CAS No.	15883-57-5
Molecular Formula	C10H6Na2O8S2
Molecular Weight	372.24 g/mol
Synonyms	3-Hydroxy-2,7-naphthalenedisulfonic Acid Disodium Salt; 2,7-Naphthalenedisulfonic Acid, 3-hydroxy-, Disodium Salt; R Salt (technical grade mixture); 2-Naphthol-3,6-disulfonic Acid Disodium Salt (isomer); 3-Hydroxynaphthalene-2,7-disulfonate Sodium Salt; NSC 403776; Acid Red 274 Intermediate
EINECS	Contact for details

Quality Control

Our 3-Hydroxynaphthalene-2,7-Disulphonic Acid, Sodium Salt is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure consistent purity and performance, meeting the specifications required for industrial synthesis. A Certificate of Analysis (COA) detailing assay, impurity profile, and physical characteristics 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 product is hygroscopic (moisture-sensitive); the container must be kept tightly sealed to prevent absorption of atmospheric moisture, which can affect quality.

Specification

Item	Specification
Appearance	Off-white to light beige powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Sulfated Ash	Contact for details
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Contact for details

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