Acyclovir Impurity 20 CAS 111-55-7

Purity >95%In StockPharmacopoeial Impurity Standards
CAS No.111-55-7
Molecular FormulaC6H10O4
Molecular Weight146.14 g/mol
CategoryPharmacopoeial Impurity Standards / EP Impurities
AvailabilityIn Stock

Chemical Structure

Acyclovir Impurity 20 CAS 111-55-7 chemical structure

Description

Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including Acyclovir Impurity 20.

Acyclovir Impurity 20 (CAS 111-55-7) is a certified pharmaceutical impurity reference standard with the molecular formula C6H10O4 and a molecular weight of 146.14 g/mol.

Owing to a carboxylic acid group, a hydroxyl group, an ether linkage, Acyclovir Impurity 20 is typically white to off-white liquid. Its solid-state physicochemical attributes — including a molecular weight of 146.14 g/mol — guide the selection of appropriate sample preparation and analytical techniques.

Recommended for quantitative analysis by HPLC, GC, LC-MS/MS, or GC-MS as an external calibration standard; it can also be used for spiked-recovery experiments, LOD/LOQ determination, and LC-MS/MS multiple-reaction-monitoring (MRM) calibration.

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 FormulaC6H10O4
Molecular Weight146.14 g/mol
Purity>95%
StorageStore at 2-8°C, keep sealed and dry
Solubility (reference)Soluble in methanol, ethanol, DMSO, water
StabilityHygroscopic; reseal immediately after opening
Degree of Unsaturation (DBE)2.0
CAS Registry Year (est.)1957

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