Butenafine Impurity 2 CAS 19692-45-6

Purity 97%+In StockPharmacopoeial Impurity Standards
CAS No.19692-45-6
Molecular FormulaC11H15Cl
Molecular Weight182.69 g/mol
CategoryPharmacopoeial Impurity Standards / EP Impurities
AvailabilityIn Stock

Chemical Structure

Butenafine Impurity 2 CAS 19692-45-6 chemical structure

Description

Butenafine Impurity 2 (CAS 19692-45-6) is a certified pharmaceutical impurity reference standard with the molecular formula C11H15Cl and a molecular weight of 182.69 g/mol.

Owing to chlorine substitution, an aromatic ring system, Butenafine Impurity 2 is typically off-white to pale yellow low-melting solid. Its solid-state physicochemical attributes — including a molecular weight of 182.69 g/mol — guide the selection of appropriate sample preparation and analytical techniques. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.

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 FormulaC11H15Cl
Molecular Weight182.69 g/mol
Purity97%+
StorageStore at 2-8°C, keep tightly closed to prevent evaporation
Solubility (reference)Soluble in chloroform, dichloromethane, ethyl acetate
StabilityMay oxidize slowly on prolonged air exposure
Degree of Unsaturation (DBE)4.0
UV AbsorptionUV-absorbing
Structural FeaturesAromatic ring present
CAS Registry Year (est.)1962
Halogen ContentCl-containing

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