Valproic Acid USP Related Compound A CAS 99-67-2

Purity >95%In StockPharmacopoeial Impurity Standards
CAS No.99-67-2
Molecular FormulaC8H12O2
Molecular Weight140.18 g/mol
CategoryPharmacopoeial Impurity Standards / EP Impurities
AvailabilityIn Stock

Chemical Structure

Valproic Acid USP Related Compound A CAS 99-67-2 chemical structure

Description

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.

Valproic Acid USP Related Compound A (CAS 99-67-2) is a certified pharmaceutical impurity reference standard with the molecular formula C8H12O2 and a molecular weight of 140.18 g/mol.

Owing to a carboxylic acid group, a hydroxyl group, an ether linkage, Valproic Acid USP Related Compound A is typically white to off-white liquid. Its solid-state physicochemical attributes — including a molecular weight of 140.18 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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 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.

Physical & Chemical Properties

Molecular FormulaC8H12O2
Molecular Weight140.18 g/mol
Purity>95%
StorageStore at 2-8°C
Solubility (reference)Soluble in methanol, acetonitrile, DMSO, water (slightly soluble)
StabilityMay oxidize slowly on prolonged air exposure
Degree of Unsaturation (DBE)3.0
UV AbsorptionUV-absorbing
CAS Registry Year (est.)1957

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