3-Isoxazolecarboxylicacid, 5-(4-bromophenyl)-, ethyl ester 33277-15-5 CTK4H0310 CAS 33277-15-5

Purity 97%+In StockPharmaceutical Standards
CAS No.33277-15-5
Molecular FormulaC12H20BrNO3
Molecular Weight306.20 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

3-Isoxazolecarboxylicacid, 5-(4-bromophenyl)-, ethyl ester 33277-15-5 CTK4H0310 CAS 33277-15-5 chemical structure

Description

Compared with other compounds in its class, the molecular weight of 306.20 g/mol gives 3-Isoxazolecarboxylicacid, 5-(4-bromophenyl)-, ethyl ester 33277-15-5 CTK4H0310 distinctive chromatographic separation conditions and mass-spectrometry parameter settings.

3-Isoxazolecarboxylicacid, 5-(4-bromophenyl)-, ethyl ester 33277-15-5 CTK4H0310 (CAS 33277-15-5), molecular formula C12H20BrNO3 and molecular weight 306.20 g/mol, is a CATO reference standard with documented purity and traceability.

Structurally, 3-Isoxazolecarboxylicacid, 5-(4-bromophenyl)-, ethyl ester 33277-15-5 CTK4H0310 (C12H20BrNO3) contains an amide group, a carboxylic acid group, a hydroxyl group, an ether linkage, bromine substitution. The molecule exhibits a degree of unsaturation (DBE) of 3.0, corresponding to approximately 3 ring(s) or double-bond equivalent(s). With a molecular weight of 306.20 g/mol, it falls into the moderately-high-molecular-weight range. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).

This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.

As a certified reference material (CRM), 3-Isoxazolecarboxylicacid, 5-(4-bromophenyl)-, ethyl ester 33277-15-5 CTK4H0310 meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.

Physical & Chemical Properties

Molecular FormulaC12H20BrNO3
Molecular Weight306.20 g/mol
AppearanceWhite to pale yellow crystalline powder. (slight halide-like odor)
Purity97%+
StorageStore at 2-8°C, protect from light, keep sealed and dry
Solubility (reference)Soluble in chloroform, dichloromethane, ethyl acetate, DMSO
StabilityMay oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening; Contains ester bond; hydrolyzes under strong alkaline conditions
Degree of Unsaturation (DBE)3.0
UV AbsorptionUV-absorbing
CAS Registry Year (est.)1966
Halogen ContentBr-containing
Nitrogen Atoms1

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