Calcipotriol Impurity 23 CAS 1630745-25-3

Purity 97%+In StockPharmacopoeial Impurity Standards
CAS No.1630745-25-3
Molecular FormulaC34H62O5SSi2
Molecular Weight639.09 g/mol
CategoryPharmacopoeial Impurity Standards / EP Impurities
AvailabilityIn Stock

Chemical Structure

Calcipotriol Impurity 23 CAS 1630745-25-3 chemical structure

Description

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.

Calcipotriol Impurity 23 (CAS 1630745-25-3) is a certified pharmaceutical impurity reference standard with the molecular formula C34H62O5SSi2 and a molecular weight of 639.09 g/mol.

Owing to a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system, Calcipotriol Impurity 23 is typically off-white to pale yellow amorphous powder. Its solid-state physicochemical attributes — including a molecular weight of 639.09 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).

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 FormulaC34H62O5SSi2
Molecular Weight639.09 g/mol
Purity97%+
StorageStore at room temperature, keep sealed and dry
Solubility (reference)Soluble in methanol, acetonitrile, DMSO, water (slightly soluble)
StabilityMay oxidize slowly on prolonged air exposure
Degree of Unsaturation (DBE)4.0
UV AbsorptionUV-absorbing
Structural FeaturesAromatic ring present
CAS Registry Year (est.)1993
Sulfur Atoms1

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