Calcipotriol Impurity 40 CAS 2106840-41-7

Purity >85%In StockPharmacopoeial Impurity Standards
CAS No.2106840-41-7
Molecular FormulaC18H28O2
Molecular Weight276.41 g/mol
CategoryPharmacopoeial Impurity Standards / EP Impurities
AvailabilityIn Stock

Chemical Structure

Calcipotriol Impurity 40 CAS 2106840-41-7 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.

Calcipotriol Impurity 40 (CAS 2106840-41-7) is a certified pharmaceutical impurity reference standard with the molecular formula C18H28O2 and a molecular weight of 276.41 g/mol.

Structurally, Calcipotriol Impurity 40 (C18H28O2) contains a steroid core, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 5.0, corresponding to approximately 5 ring(s) or double-bond equivalent(s). With a molecular weight of 276.41 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.

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.

Physical & Chemical Properties

Molecular FormulaC18H28O2
Molecular Weight276.41 g/mol
AppearanceOff-white to pale yellow crystalline powder
Purity>85%
StorageStore at room temperature
Solubility (reference)Soluble in chloroform, dichloromethane, ethyl acetate, DMSO
StabilityMay oxidize slowly on prolonged air exposure
Degree of Unsaturation (DBE)5.0
UV AbsorptionUV-absorbing
Structural FeaturesAromatic ring present
CAS Registry Year (est.)1997

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