(S)-Citalopram CAS 128196-01-0
| CAS No. | 128196-01-0 |
| Molecular Formula | C20H21FN2O |
| Molecular Weight | 324.39 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Owing to a steroid core, an amide group, a hydroxyl group, an ether linkage, fluorine substitution, (S)-Citalopram is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 324.39 g/mol — guide the selection of appropriate sample preparation and analytical techniques. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
(S)-Citalopram (CAS 128196-01-0), molecular formula C20H21FN2O and molecular weight 324.39 g/mol, is a CATO reference standard with documented purity and traceability.
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.
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 Formula | C20H21FN2O |
| Molecular Weight | 324.39 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor) |
| Purity | >95% |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 11.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1993 |
| Halogen Content | F-containing |
| Nitrogen Atoms | 2 |
Related S Standards
- Citalopram Impurity N1 (CAS 920282-75-3)
- Citalopram EP Impurity I (Mixture of Z and E Isomers) (CAS CATO-C4X-110918)
- Citalopram (CAS 59729-33-8)
- Citalopram Impurity 17 (CAS 1187671-15-3)
- Citalopram Impurity 22 (CAS 227954-87-2)
- Citalopram Impurity 64 (CAS CATO-C4X-110964)
- Citalopram-d4 (CAS 1219908-84-5)
- Citalopram-d6 (CAS 1190003-26-9)
Recommended Standards
- Prusogliptin Impurity 14 (CAS CATO-C4X-328414)
- Prusogliptin Impurity 13 (CAS CATO-C4X-328413)
- EsCitalopram EP Impurity I (CAS 1370643-22-3)
- Ruxolitinib Impurity 170 (CAS CATO-C4X-2058170)
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