phenyl dihydrogen phosphite CAS 3486-75-7

Purity ≥95%In StockPharmaceutical Standards
CAS No.3486-75-7
Molecular FormulaC6H7O3P
Molecular Weight158.09 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

phenyl dihydrogen phosphite CAS 3486-75-7 chemical structure

Description

phenyl dihydrogen phosphite (CAS 3486-75-7) is a high-purity analytical reference standard with the molecular formula C6H7O3P and a molecular weight of 158.09 g/mol.

Structurally, phenyl dihydrogen phosphite (C6H7O3P) contains a phosphonate group, a carboxylic acid group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 3.5, corresponding to approximately 3 ring(s) or double-bond equivalent(s). With a molecular weight of 158.09 g/mol, it falls into the medium-molecular-weight range. 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.

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 FormulaC6H7O3P
Molecular Weight158.09 g/mol
Purity≥95%
StorageStore at 2-8°C, keep sealed and dry
Solubility (reference)Soluble in methanol, ethanol, DMSO, water
StabilityMay oxidize slowly on prolonged air exposure; Hygroscopic; reseal immediately after opening
Degree of Unsaturation (DBE)3.5
UV AbsorptionUV-absorbing
CAS Registry Year (est.)1957

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