Description

Phenylsulfonic Acid CAS NO 90-11-3 is a versatile aromatic sulfonic acid widely used as a key intermediate and catalyst in organic synthesis. Its strong acidity and solubility in organic solvents make it a valuable reagent for industrial processes where precise protonation and sulfonation are required. This product is essential for manufacturers in the chemical, pharmaceutical, and agrochemical sectors seeking reliable, high-purity intermediates.

Application

• Chemical Intermediate: A crucial building block for synthesizing dyes, pigments, and specialty surfactants.
• Catalyst: Used as an acid catalyst in esterification, alkylation, and other organic reactions, often as an alternative to mineral acids.
• Pharmaceutical Synthesis: Serves as an intermediate in the production of certain active pharmaceutical ingredients (APIs) and fine chemicals.
• Electroplating Additive: Employed in electroplating baths to improve bath stability and metal deposition quality.
• Resin Modification: Used in the production and curing of phenolic and other specialty resins.
• Research & Development: A valuable reagent in academic and industrial R&D laboratories for method development and scale-up studies.

Basic Information

Product Name	Phenylsulfonic Acid
CAS No.	90-11-3
Molecular Formula	C6H6O3S
Molecular Weight	158.17 g/mol
Synonyms	Benzenesulfonic Acid; Phenolsulfonic Acid; Benzene Sulfonic Acid; Phenylsulphonic Acid; Benzenesulphonic Acid; Monophenylsulfonic Acid; Benzenesulfonic Acid Monohydrate (common form); EINECS 201-968-4
EINECS	201-968-4

Quality Control

Our Phenylsulfonic Acid is manufactured under strict quality management protocols. Each batch undergoes rigorous analytical testing to ensure it meets precise chemical and physical specifications. A comprehensive Certificate of Analysis (COA) detailing purity, assay, and impurity profiles is provided with every shipment to guarantee consistency and traceability for your critical processes.

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 material is hygroscopic (moisture-sensitive); ensure containers are kept tightly sealed to prevent absorption of atmospheric moisture. Keep away from strong bases and oxidizing agents.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid or crystalline solid
Identification (IR)	Conforms
Assay (Titration)	≥ 98.0%
Water Content (KF)	≤ 2.0%
Sulfate (as SO4)	≤ 0.5%
Heavy Metals (as Pb)	≤ 10 ppm

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