2,3,4-Trimethylbenzenesulfonic Acid CAS 28987-67-9

Purity 97%+In StockPharmaceutical Standards
CAS No.28987-67-9
Molecular FormulaC9H12O3S
Molecular Weight200.25 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

2,3,4-Trimethylbenzenesulfonic Acid CAS 28987-67-9 chemical structure

Description

Owing to a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system, 2,3,4-Trimethylbenzenesulfonic Acid is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 200.25 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).

2,3,4-Trimethylbenzenesulfonic Acid (CAS 28987-67-9) is a high-purity analytical reference standard with the molecular formula C9H12O3S and a molecular weight of 200.25 g/mol.

This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.

As a certified reference material (CRM), 2,3,4-Trimethylbenzenesulfonic Acid meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.

Physical & Chemical Properties

Molecular FormulaC9H12O3S
Molecular Weight200.25 g/mol
Purity97%+
StorageStore in a cool place (≤25°C), keep sealed and dry
Solubility (reference)Soluble in methanol, ethanol, DMSO
StabilityMay oxidize slowly on prolonged air exposure; Hygroscopic; reseal immediately after opening
Degree of Unsaturation (DBE)4.0
UV AbsorptionUV-absorbing
Structural FeaturesAromatic ring present
CAS Registry Year (est.)1965
Sulfur Atoms1

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