(±)-Cetirizine-d4 (ethoxy-d4) CAS 1219803-84-5
| CAS No. | 1219803-84-5 |
| Molecular Formula | - |
| Molecular Weight | 392.91 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including (±)-Cetirizine-d4 (ethoxy-d4).
(±)-Cetirizine-d4 (ethoxy-d4) (CAS 1219803-84-5) is a high-purity analytical reference standard with the molecular formula C21H21D4ClN2O3 and a molecular weight of 392.91 g/mol.
Structurally, (±)-Cetirizine-d4 (ethoxy-d4) (C21H21D4ClN2O3) contains deuterium isotope labeling, a steroid core, an amide group, a hydroxyl group, an ether linkage, chlorine 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 392.91 g/mol, it falls into the moderately-high-molecular-weight range. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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 | C21H21D4ClN2O3 |
| Molecular Weight | 392.91 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor) |
| Purity | >95% |
| Storage | Store at 2-8°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.) | 1990 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
Related Cetirizine Standards
- Cetirizine EP Impurity C (CAS 83881-59-8)
- Cetirizine (CAS 83881-51-0)
- Cetirizine-d8 (CAS 774596-22-4)
- Cetirizine USP Related Compound C (CAS 83881-37-2)
- Cetirizine Impurity 15 (CAS CATO-C4X-158215)
- rac Cetirizine N-Oxide (Mixture of Diastereomers) (CAS 1076199-80-8)
- rac Cetirizine-d8 N-Oxide (CAS 1216444-13-1)
- Cetirizine Impurity 29 (CAS 62084-35-9)
Recommended Standards
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- 2-(Bromomethyl)-6-(difluoromethyl)-4-iodo-3-nitropyridine (CAS 1806860-79-6)
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- 2-(Difluoromethyl)-5-nitropyridin-4-ol (CAS 1805314-41-3)
- N-Benzyl-4-(diphenylphosphoryl)benzamide (CAS 90304-92-0)
- Atalantoflavone (CAS 119309-02-3)
- Ethyl 2-amino-3-hydroxy-3-(pyridin-3-yl)propanoate (CAS 1483341-31-6)
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