Potassium metabisulfite CAS 16731-55-8

Purity 97%+In StockPharmaceutical Standards
CAS No.16731-55-8
Molecular FormulaO5S2
Molecular WeightN/A
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

Potassium metabisulfite CAS 16731-55-8 chemical structure

Description

The occurrence of Potassium metabisulfite is closely related to a sulfone group in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.

Potassium metabisulfite (CAS 16731-55-8), molecular formula O5S2K and molecular weight 183.21 g/mol, is a CATO reference standard with documented purity and traceability.

The molecular framework of Potassium metabisulfite (O5S2K) is characterized by a sulfone group. In reversed-phase chromatography, its retention is governed primarily by the polarity and ionization state of its functional groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development.

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), Potassium metabisulfite 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 FormulaO5S2 2*K
Molecular Weight183.21 g/mol
Purity97%+
StorageStore at 2-8°C, keep sealed and dry
Solubility (reference)Freely soluble in water
StabilityHygroscopic; reseal immediately after opening
CAS Registry Year (est.)1961
Sulfur Atoms2

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Why CATO?