Valproate Impurity 38 CAS 55898-43-6

Purity >95%In StockPharmacopoeial Impurity Standards
CAS No.55898-43-6
Molecular FormulaC11H20O4
Molecular Weight216.27 g/mol
CategoryPharmacopoeial Impurity Standards / EP Impurities
AvailabilityIn Stock

Chemical Structure

Valproate Impurity 38 CAS 55898-43-6 chemical structure

Description

Compared with other compounds in its class, the molecular weight of 216.27 g/mol gives Valproate Impurity 38 distinctive chromatographic separation conditions and mass-spectrometry parameter settings.

Valproate Impurity 38 (CAS 55898-43-6) is a certified pharmaceutical impurity reference standard with the molecular formula C11H20O4 and a molecular weight of 216.27 g/mol.

Structurally, Valproate Impurity 38 (C11H20O4) contains a carboxylic acid group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 2.0, corresponding to approximately 2 ring(s) or double-bond equivalent(s). With a molecular weight of 216.27 g/mol, it falls into the medium-molecular-weight range. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.

This reference standard supports related-substances testing and method development in line with ICH Q3A/Q3B guidance on impurity control, and is suitable for system suitability testing and forced-degradation studies.

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 FormulaC11H20O4
Molecular Weight216.27 g/mol
Purity>95%
StorageStore in a cool place (≤25°C), keep sealed and dry
Solubility (reference)Soluble in methanol, ethanol, DMSO
StabilityHygroscopic; reseal immediately after opening
Degree of Unsaturation (DBE)2.0
CAS Registry Year (est.)1972

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