5-Sulfoisophthalic Acid CAS 22326-31-4

Purity 97%+In StockPharmaceutical Standards
CAS No.22326-31-4
Molecular FormulaC8H6O7S
Molecular Weight246.19 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

5-Sulfoisophthalic Acid CAS 22326-31-4 chemical structure

Description

The occurrence of 5-Sulfoisophthalic Acid is closely related to a carbohydrate-derived structure, a sulfone group in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.

5-Sulfoisophthalic Acid (CAS 22326-31-4) is a high-purity analytical reference standard with the molecular formula C8H6O7S and a molecular weight of 246.19 g/mol.

Based on its molecular formula C8H6O7S, 5-Sulfoisophthalic Acid contains a carbohydrate-derived structure, a sulfone group; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 246.19 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).

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), 5-Sulfoisophthalic 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 FormulaC8H6O7S
Molecular Weight246.19 g/mol
Purity97%+
StorageStore at 2-8°C, protect from light, keep sealed and dry
Solubility (reference)Soluble in methanol, ethanol, DMSO
StabilityMay oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening
Degree of Unsaturation (DBE)6.0
UV AbsorptionUV-absorbing
Structural FeaturesAromatic ring present
CAS Registry Year (est.)1963
Sulfur Atoms1

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