Description

Benzenesulfonic Acid Monohydrate is a versatile organic acid salt widely used as a key intermediate and catalyst in industrial synthesis. Its strong acidic nature in solution makes it valuable for various chemical transformations and manufacturing processes. This compound is essential for producers in the pharmaceutical, agrochemical, dye, and polymer industries seeking a reliable and effective sulfonating agent or acid catalyst.

Application

• Chemical Synthesis Intermediate: A crucial building block for manufacturing dyes, pigments, and fluorescent brightening agents.
• Catalyst: Used as an acid catalyst in esterification, alkylation, and resin curing reactions.
• Pharmaceutical Manufacturing: Serves as an intermediate in the synthesis of certain active pharmaceutical ingredients (APIs) and sulfa drugs.
• Agrochemical Production: Employed in the synthesis of herbicides, pesticides, and plant growth regulators.
• Electroplating Additive: Functions as a brightening agent and leveler in electroplating baths.
• Polymer Industry: Acts as a curing agent for epoxy resins and a component in ion-exchange resins.

Basic Information

Product Name	Benzenesulfonic Acid Monohydrate
CAS No.	5928-72-3
Molecular Formula	C6H8O4S
Molecular Weight	176.19 g/mol
Synonyms	Benzenesulfonic Acid Hydrate; Benzenesulphonic Acid Monohydrate; Phenylsulfonic Acid Monohydrate; Besylic Acid Monohydrate; BSA Monohydrate; Benzene-1-sulfonic Acid Monohydrate; Benzenesulfonate Monohydrate
EINECS	227-671-4

Quality Control

Our Benzenesulfonic Acid Monohydrate is manufactured under a strict quality management system. Each batch undergoes comprehensive analytical testing to ensure it meets precise specifications for purity, identity, and physical properties. Certificates of Analysis (COA) documenting these results are available for every shipment to guarantee traceability and compliance with your quality 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). This material is hygroscopic (moisture-sensitive) and should be kept in original packaging to minimize exposure to atmospheric humidity.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to standard
Assay (Titration)	≥ 98.0 %
Water Content (KF)	9.0 - 11.0 %
Melting Point	43 - 48 °C
Heavy Metals (as Pb)	≤ 20 ppm
Sulfate (as SO4)	≤ 0.1 %

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