Description

Disodium 3-Hydroxy-5-Sulphonato-2-Naphthoate is a high-purity, water-soluble naphthalene derivative salt, essential as a key intermediate in the synthesis of dyes and pigments. Its primary value lies in providing the sulfonated aromatic structure necessary for creating vivid, colorfast azo and reactive dyes. This compound is critically needed by manufacturers in the textile, ink, and specialty chemical industries for producing high-performance coloring agents.

Application

• Primary Intermediate for Dye Synthesis: A crucial building block in the manufacture of acid dyes, direct dyes, and reactive dyes, particularly for textiles like wool, silk, and nylon.
• Pigment Manufacturing: Used in the production of lake pigments and organic pigments for inks, paints, and plastics, where sulfonation enhances solubility and color properties.
• Specialty Chemical Production: Serves as a key intermediate for synthesizing more complex sulfonated aromatic compounds used in various industrial processes.
• Research & Development: Employed in chemical R&D for developing new chromophores and functional materials with specific light-absorption characteristics.
• Laboratory Reagent: Used as a standard or reagent in analytical and synthetic chemistry laboratories.

Basic Information

Product Name	Disodium 3-Hydroxy-5-Sulphonato-2-Naphthoate
CAS No.	84145-65-3
Molecular Formula	C11H6Na2O6S
Molecular Weight	312.20 g/mol
Synonyms	3-Hydroxy-5-sulfo-2-naphthoic acid disodium salt; 5-Sulfo-3-hydroxy-2-naphthoic acid disodium salt; Disodium 3-hydroxy-5-sulfo-2-naphthoate; 2-Naphthoic acid, 3-hydroxy-5-sulfo-, disodium salt; 3-Hydroxy-5-sulfonaphthalene-2-carboxylic acid disodium salt; 5-Sulfosalicylic acid naphthalene derivative disodium salt; Azoic coupling component intermediate
EINECS	Contact for details

Quality Control

Our Disodium 3-Hydroxy-5-Sulphonato-2-Naphthoate is produced under strict quality management systems. Every batch undergoes rigorous analytical testing to ensure it meets precise specifications for purity, identity, and composition. A comprehensive Certificate of Analysis (COA) detailing assay, impurity profile, and physical parameters is provided with each shipment to guarantee traceability and consistency for your manufacturing processes.

Storage

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

Specification

Item	Specification
Appearance	Off-white to light yellow powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 2.0%
Sulfated Ash	Contact for details
Heavy Metals (as Pb)	≤ 20 ppm
pH (1% Solution)	7.0 - 9.0
Solubility	Freely soluble in water

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