Calcium sulfite CAS 10257-55-3

Purity 97%+In StockPharmaceutical Standards
CAS No.10257-55-3
Molecular FormulaH2O3S
Molecular WeightN/A
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

Calcium sulfite CAS 10257-55-3 chemical structure

Description

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

Calcium sulfite (CAS 10257-55-3), molecular formula H2O3SCa and molecular weight 122.15 g/mol, is a CATO reference standard with documented purity and traceability.

Calcium sulfite (H2O3SCa) contains a sulfone group. It is notably hygroscopic; these physicochemical properties determine the optimal preparation and storage of its standard solutions.

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.

The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.

Physical & Chemical Properties

Molecular FormulaH2O3S Ca
Molecular Weight122.15 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.)1959
Sulfur Atoms1

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Why CATO?