(S)-Citalopram Oxalate CAS 219861-08-2
| CAS No. | 219861-08-2 |
| Molecular Formula | C20H21FN2O |
| Molecular Weight | N/A |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 414.43 g/mol gives (S)-Citalopram Oxalate distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
(S)-Citalopram Oxalate (CAS 219861-08-2), molecular formula C20H21FN2OC2H2O4 and molecular weight 414.43 g/mol, is a CATO reference standard with documented purity and traceability.
Structurally, (S)-Citalopram Oxalate (C20H21FN2OC2H2O4) contains a flavonoid core, an amide group, a hydroxyl group, an ether linkage, fluorine substitution. The molecule exhibits a degree of unsaturation (DBE) of 12.0, corresponding to approximately 12 ring(s) or double-bond equivalent(s). With a molecular weight of 414.43 g/mol, it falls into the moderately-high-molecular-weight range. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
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), (S)-Citalopram Oxalate 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 Formula | C20H21FN2O C2H2O4 |
| Molecular Weight | 414.43 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor) |
| Purity | >95% |
| Storage | Store in a cool place (≤25°C), protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May 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) | 12.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2019 |
| Halogen Content | F-containing |
| Nitrogen Atoms | 2 |
Related S Standards
- Citalopram Impurity 38 (CAS 103146-26-5)
- Citalopram Impurity 17 (CAS 1187671-15-3)
- Citalopram EP Impurity D HBr (CAS 1188264-72-3)
- Citalopram-d6 N-Oxide (CAS 1189652-54-7)
- Citalopram-d6 (CAS 1190003-26-9)
- (R)-Citalopram-d6 N-Oxide (CAS 1217669-62-9)
- (S)-Citalopram-d6 N-Oxide (CAS 1217710-65-0)
- (S)-Citalopram-d6 Oxalate (CAS 1217733-09-9)
Recommended Standards
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- ((2R,3S,5S)-5-Ethoxy-3-isopropoxytetrahydrofuran-2-yl)methanol (CAS 146764-52-5)
- 5-Bromo-2-ethyl-3-iodo-1H-pyrrolo[2,3-b]pyridine (CAS 1228666-12-3)
- N-(1,1-dioxo-1λ⁶-thietan-3-yl)-1-(hydrazinecarbonyl)formamide (CAS 1856309-61-9)
- 3-Bromo-4-((2-fluorobenzyl)oxy)benzaldehyde (CAS 428497-60-3)
- 4-Amino-N-(4,6-diphenylpyrimidin-2-yl)benzenesulfonamide (CAS 61654-08-8)
- 5-Chloro-1-(4-methylbenzyl)-2-oxo-N-phenyl-1,2-dihydropyridine-3-carboxamide (CAS 400087-62-9)
- Semaglutide Impurity 1(OtBu-Ste-D-γGlu(OtBu)-AEEA-AEEA-OH) (CAS CATO-C4X-22261)
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