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Benzenesulfonic acid, 94%
Description
Benzenesulfonic acid is mainly consumed by conversion to other specialty chemicals. A variety of pharmaceutical drugs are prepared as salts of benzenesulfonic acid and are known as besylates or besilates. The alkali metal salt of benzenesulfonic acid was once widely used in the production of phenol. It acts as an acid catalyst for direct esterification of amino acids and peptides.
This Thermo Scientific Chemicals brand product was originally part of the Alfa Aesar product portfolio. Some documentation and label information may refer to the legacy brand. The original Alfa Aesar product / item code or SKU reference has not changed as a part of the brand transition to Thermo Scientific Chemicals.
Benzenesulfonic acid is mainly consumed by conversion to other specialty chemicals. A variety of pharmaceutical drugs are prepared as salts of benzenesulfonic acid and are known as besylates or besilates. The alkali metal salt of benzenesulfonic acid was once widely used in the production of phenol. It acts as an acid catalyst for direct esterification of amino acids and peptides.
Solubility
Soluble in water and alcohol. Slightly soluble in benzene. Insoluble in non-polar solvents.
Notes
It is hygroscopic. Incompatible with oxidizing agents and bases.

Specifications
Specifications
Melting Point | ∼45°C to 50°C |
Density | 1.32 |
Flash Point | >110°C (230°F) |
Quantity | 100 g |
UN Number | UN2585 |
Beilstein | 742513 |
Sensitivity | Hygroscopic |
Merck Index | 14,1070 |
Solubility Information | Soluble in water and alcohol. Slightly soluble in benzene. Insoluble in non-polar solvents. |
Formula Weight | 158.18 |
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Safety and Handling
Hazard Category | H302-H314-H335 |
Hazard Statement | GHS H Statement H314-H318-H302 Causes severe skin burns and eye damage. Causes serious eye damage. Harmful if swallowed. |
Precautionary Statement | P260-P264b-P270-P271-P280-P303+P361+P353-P304+P340-P305+P351+P338-P310-P330-P331-P363-P501c |
DOTInformation | Transport Hazard Class: 8; Packing Group: III; Proper Shipping Name: ARYL SULFONIC ACIDS, SOLID |
EINECSNumber | 202-638-7 |
RTECSNumber | DB4200000 |
TSCA | Yes |
Recommended Storage | Ambient temperatures |
RUO – Research Use Only
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