Sodium phosphite pentahydrate CAS 13517-23-2

Purity 97%+In StockPharmaceutical Standards
CAS No.13517-23-2
Molecular FormulaHO3P
Molecular WeightN/A
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

Sodium phosphite pentahydrate CAS 13517-23-2 chemical structure

Description

Sodium phosphite pentahydrate (CAS 13517-23-2), molecular formula HO3PNaH2O and molecular weight 120.98 g/mol, is a CATO reference standard with documented purity and traceability.

Owing to a phosphate ester group, Sodium phosphite pentahydrate is typically white to off-white liquid. Its solid-state physicochemical attributes — including a molecular weight of 120.98 g/mol — guide the selection of appropriate sample preparation and analytical techniques.

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), Sodium phosphite pentahydrate 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 FormulaHO3P 2*Na 5*H2O
Molecular Weight120.98 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.)1960

Recommended Standards

Why CATO?