Roxatidine Impurity 38 CAS CATO-C4X-121338
| CAS No. | CATO-C4X-121338 |
| Molecular Formula | C18H26N2O4 |
| Molecular Weight | 334.41 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
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.
CATO supplies Roxatidine Impurity 38 (CAS CATO-C4X-121338), a pharmacopoeial impurity reference standard (molecular formula C18H26N2O4, MW 334.41 g/mol) used for the identification and quantification of trace impurities in APIs.
The molecular framework of Roxatidine Impurity 38 (C18H26N2O4) is characterized by a flavonoid core, an amide group, a hydroxyl group, an ether linkage. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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.
Physical & Chemical Properties
| Molecular Formula | C18H26N2O4 |
| Molecular Weight | 334.41 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 | 2 |
Related Roxatidine Standards
- Roxatidine Impurity 37 (CAS CATO-C4X-121337)
- Roxatidine Impurity 28 (CAS CATO-C4X-121328)
- Roxatidine Impurity 79 (CAS CATO-C4X-121379)
- Roxatidine Impurity 12 (CAS CATO-C4X-121312)
- Roxatidine Impurity 32 (CAS CATO-C4X-121332)
- Roxatidine Impurity 27 (CAS CATO-C4X-121327)
- Roxatidine Impurity 30 (CAS CATO-C4X-121330)
- Roxatidine Impurity 31 (CAS CATO-C4X-121331)
Recommended Standards
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- Ibuprofen impurity 143 (CAS CATO-C4X-1082143)
- Etomidate impurity 68 (CAS CATO-C4X-188468)
- Venetoclax Impurity 129 (CAS CATO-C4X-2495129)
- Paliperidone Impurity 20 (CAS CATO-C4X-172420)
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Why CATO?
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