Tofacitinib Impurity 155 CAS 2032-35-1

Purity 97%+In StockPharmacopoeial Impurity Standards
CAS No.2032-35-1
Molecular FormulaC6H13BrO2
Molecular Weight197.07 g/mol
CategoryPharmacopoeial Impurity Standards / EP Impurities
AvailabilityIn Stock

Chemical Structure

Tofacitinib Impurity 155 CAS 2032-35-1 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.

CATO supplies Tofacitinib Impurity 155 (CAS 2032-35-1), a pharmacopoeial impurity reference standard (molecular formula C6H13BrO2, MW 197.07 g/mol) used for the identification and quantification of trace impurities in APIs.

Structurally, Tofacitinib Impurity 155 (C6H13BrO2) contains a carboxylic acid group, a hydroxyl group, an ether linkage, bromine substitution. The molecule exhibits a degree of unsaturation (DBE) of 0.0, corresponding to approximately 0 ring(s) or double-bond equivalent(s). With a molecular weight of 197.07 g/mol, it falls into the medium-molecular-weight range. 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.

Physical & Chemical Properties

Molecular FormulaC6H13BrO2
Molecular Weight197.07 g/mol
Purity97%+
StorageStore at 2-8°C, keep tightly closed to prevent evaporation
Solubility (reference)Soluble in methanol, acetonitrile, DMSO, water (slightly soluble)
StabilityContains ester bond; hydrolyzes under strong alkaline conditions
Degree of Unsaturation (DBE)0.0
CAS Registry Year (est.)1957
Halogen ContentBr-containing

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