Description

Phenolsulfonic Acid CAS NO 1333-39-7 is a versatile organic acid widely utilized as a key intermediate and catalyst in industrial synthesis. Its strong acidic properties and solubility in organic solvents make it a valuable reagent for chemical modifications and polymer production. This compound is essential for manufacturers in sectors such as chemical synthesis, resin manufacturing, and metal surface treatment.

Application

• Chemical Synthesis Intermediate: Acts as a crucial building block for synthesizing dyes, pharmaceuticals, and agrochemicals.
• Catalyst for Resin Production: Used in the manufacture of phenolic resins and other thermosetting polymers.
• Metal Treatment & Electroplating: Employed in pickling baths and electroplating solutions for surface preparation and finishing.
• Curing Agent: Functions as a cross-linking or curing agent in specific adhesive and coating formulations.
• Laboratory Reagent: Serves as an analytical reagent and catalyst in various organic chemistry research applications.
• Ion Exchange Resin Precursor: Used in the production of certain types of ion exchange materials.

Basic Information

Product Name	Phenolsulfonic Acid
CAS No.	1333-39-7
Molecular Formula	C6H6O4S
Molecular Weight	174.17 g/mol
Synonyms	Phenol-4-sulfonic Acid; 4-Hydroxybenzenesulfonic Acid; Benzenesulfonic acid, 4-hydroxy-; p-Phenolsulfonic Acid; Sulfocarbolic Acid; Hydroxybenzenesulfonic Acid; PSA
EINECS	215-570-8

Quality Control

Our Phenolsulfonic Acid is produced under a stringent quality management system to ensure batch-to-batch consistency and reliability. Each lot undergoes comprehensive analytical testing, including assay, purity, and impurity profile checks. A Certificate of Analysis (COA) detailing all test results is provided with every shipment to guarantee compliance with your technical requirements.

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, containers must be kept tightly sealed after opening to prevent absorption of atmospheric moisture. Keep away from incompatible materials such as strong bases and oxidizing agents.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms
Assay (Titration)	≥ 95.0 %
Water Content (KF)	≤ 5.0 %
Sulfuric Acid (as H2SO4)	≤ 2.0 %
Free Phenol	≤ 1.0 %

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