Description

Hydroxybenzenesulfonic Acid, Sodium Salt Dihydrate is a versatile organic salt widely used as a key intermediate and functional additive in industrial synthesis. Its primary value lies in its ability to act as a sulfonating agent and a water-soluble source of the phenolsulfonate moiety, facilitating various chemical transformations and product formulations. This compound is essential for manufacturers in the pharmaceutical, dye and pigment, and specialty chemical sectors seeking reliable, high-purity raw materials for their processes.

Application

• Pharmaceutical Intermediate: Used in the synthesis of active pharmaceutical ingredients (APIs) and diagnostic agents.
• Dye and Pigment Manufacturing: Serves as a key building block for producing sulfonated azo dyes and other colorants.
• Chemical Synthesis: Acts as a versatile intermediate for creating surfactants, resins, and other specialty organic compounds.
• Electroplating Additive: Employed in bath formulations to improve surface finish and deposition quality.
• Photographic Chemical: Used in the production of certain developers and sensitizers.
• Research & Development: A valuable reagent for academic and industrial R&D in organic and medicinal chemistry.

Basic Information

Item	Details
Product Name	Hydroxybenzenesulfonic Acid, Sodium Salt Dihydrate
CAS No.	1300-52-3
Molecular Formula	C6H7NaO6S · 2H2O
Molecular Weight	254.18 g/mol
Synonyms	Sodium Phenolsulfonate Dihydrate; Phenolsulfonic Acid Sodium Salt Dihydrate; Sodium Hydroxybenzenesulfonate Dihydrate; 4-Hydroxybenzenesulfonic Acid Sodium Salt Dihydrate; Atophan; Soluble Phenol Sulfonate; Sodium Sulfocarbolate; Phenol-4-sulfonic Acid Sodium Salt
EINECS	215-087-1

Quality Control

Our Hydroxybenzenesulfonic Acid, Sodium Salt Dihydrate is produced under a stringent quality management system. Each batch undergoes comprehensive analytical testing to ensure it meets precise specifications for identity, purity, and composition. Certificates of Analysis (COA) documenting these results are provided and can be tailored to meet specific customer or regulatory requirements, including those for pharmaceutical intermediates.

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 to prevent absorption of atmospheric moisture, which can affect product quality and handling properties.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms
Assay (Titration)	≥ 98.0 %
Water Content (KF)	13.0 - 15.0 %
pH (5% Solution)	5.0 - 7.0
Heavy Metals (as Pb)	≤ 20 ppm
Residue on Ignition	≤ 0.1 %
Clarity of Solution	Clear

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