Description

4-Hydroxybenzenesulfonic Acid Sodium Salt Hydrate is an important aromatic sulfonate salt widely used as a key intermediate and functional additive in various industrial processes. Its significance lies in its dual functionality, combining the reactivity of a phenolic hydroxyl group with the water-solubility and ionic character of a sulfonate salt. This compound is essential for manufacturers in the chemical synthesis, dye, and polymer industries seeking reliable, high-purity raw materials for consistent production outcomes.

Application

• Chemical Synthesis Intermediate: A crucial building block for the production of dyes, pigments, and specialty chemicals.
• Electroplating Additive: Used in electroplating baths as a brightening agent and stabilizer for metal deposition processes.
• Polymer Industry: Acts as a monomer or modifying agent in the synthesis of specialty polymers and resins.
• Photographic Chemical: Serves as a component in certain photographic developers and processing solutions.
• Pharmaceutical Intermediate: Employed in the synthesis of certain active pharmaceutical ingredients (APIs) and diagnostic agents.
• Research & Development: Utilized in laboratory-scale organic synthesis and material science research.

Basic Information

Item	Detail
Product Name	4-Hydroxybenzenesulfonic Acid Sodium Salt Hydrate
CAS No.	28469-73-0
Molecular Formula	C6H5NaO4S · xH2O
Molecular Weight	196.16 (Anhydrous basis)
Synonyms	Sodium 4-Hydroxybenzenesulfonate Hydrate; Sodium Phenol-4-sulfonate Hydrate; p-Hydroxybenzenesulfonic Acid Sodium Salt; Phenolsulfonic Acid Sodium Salt; Sodium p-Phenolsulfonate; 4-Hydroxybenzenesulfonic Acid Sodium Salt; Sodium Phenolsulfonate; p-Phenolsulfonic Acid Sodium Salt
EINECS	Contact for details

Quality Control

Our production of 4-Hydroxybenzenesulfonic Acid Sodium Salt Hydrate adheres to stringent quality management protocols to ensure batch-to-batch consistency and reliability. Each lot undergoes comprehensive analytical testing, including assay, impurity profiling, and identity confirmation. Certificates of Analysis (COA) documenting purity, physical characteristics, and test results are available upon request to support your quality assurance and regulatory compliance needs.

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 nature, the container must be kept tightly sealed after opening to minimize exposure to atmospheric moisture.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 2.0%
Heavy Metals (as Pb)	≤ 20 ppm
Residue on Ignition (Sulfated Ash)	Contact for details
pH (5% Solution)	Contact for details

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