Roxatidine Impurity 81 CAS CATO-C4X-121381
| CAS No. | CATO-C4X-121381 |
| Molecular Formula | C19H29N3O4 |
| Molecular Weight | 363.45 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
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.
Roxatidine Impurity 81 (CAS CATO-C4X-121381) is a certified pharmaceutical impurity reference standard with the molecular formula C19H29N3O4 and a molecular weight of 363.45 g/mol.
Based on its molecular formula C19H29N3O4, Roxatidine Impurity 81 contains a flavonoid core, an amide group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 363.45 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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 | C19H29N3O4 |
| Molecular Weight | 363.45 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| 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 |
| Degree of Unsaturation (DBE) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 3 |
Related Roxatidine Standards
- Roxatidine Impurity 9 (CAS CATO-C4X-12139)
- Roxatidine Impurity 19 (CAS CATO-C4X-121319)
- Roxatidine Impurity 75 (CAS CATO-C4X-121375)
- Roxatidine Impurity 52 (CAS CATO-C4X-121352)
- Roxatidine Impurity 11 (CAS CATO-C4X-121311)
- Roxatidine Impurity 16 (CAS CATO-C4X-121316)
- Roxatidine Impurity 39 (CAS CATO-C4X-121339)
- Roxatidine Impurity 40 (CAS CATO-C4X-121340)
Recommended Standards
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- Venlafaxine Impurity 11 (CAS CATO-C4X-143411)
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- Venlafaxine Impurity 12 (CAS CATO-C4X-143412)
- Sucralose EP Impurity G (CAS 105066-20-4)
- Finerenone Impurity 197 (CAS 2640599-62-6)
- Imatinib Impurity 93 (CAS 870459-88-4)
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- 1-(4-Chlorobenzyl)-5-methyl-1h-1,2,3-triazole-4-carboxylic acid (CAS 1033463-41-0)
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