Valaciclovir Impurity 37 CAS CATO-C4X-124837
| CAS No. | CATO-C4X-124837 |
| Molecular Formula | C20H23NO4 |
| Molecular Weight | 341.40 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 341.40 g/mol gives Valaciclovir Impurity 37 distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
Valaciclovir Impurity 37 (CAS CATO-C4X-124837) is a certified pharmaceutical impurity reference standard with the molecular formula C20H23NO4 and a molecular weight of 341.40 g/mol.
Structurally, Valaciclovir Impurity 37 (C20H23NO4) contains a flavonoid core, an amide group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 10.0, corresponding to approximately 10 ring(s) or double-bond equivalent(s). With a molecular weight of 341.40 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).
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.
As a certified reference material (CRM), Valaciclovir Impurity 37 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 | C20H23NO4 |
| Molecular Weight | 341.40 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | >95% |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 1 |
Related Valaciclovir Standards
- Valaciclovir Impurity 42 (CAS 73504-31-1)
- Valaciclovir EP Impurity J (CAS 142963-63-1)
- Valaciclovir EP Impurity C (CAS 1346747-65-6)
- Valaciclovir Impurity 36 (CAS 19542-54-2)
- Valaciclovir EP Impurity M (CAS 847670-62-6)
- Valaciclovir EP Impurity D (CAS 1346747-69-0)
- Valaciclovir EP Impurity R (CAS 142963-59-5)
- Valaciclovir EP Impurity R (CAS 142963-60-8)
Recommended Standards
- Apixaban Impurity 122 (CAS CATO-C4X-1088122)
- Saxagliptin Impurity 19 (CAS 681282-72-4)
- Nalmefene Impurity 22 (CAS CATO-C4X-126822)
- Enzalutamide Impurity 65 (CAS CATO-C4X-101665)
- Acetylcysteine Impurity 22 (CAS CATO-C4X-153222)
- Finerenone Impurity 22 (CAS 1260883-35-9 (ketone form))
- Raloxifene Impurity 13 (CAS 185416-01-7)
- Azithromycin impurity 57 (CAS CATO-C4X-100357)
- 2,2'-(Propane-2,2-diyl)bis(4,4,5,5-tetramethyl-1,3,2-dioxaborolane) (CAS 1655490-55-3)
- Hydantoin Impurity 12 (CAS 113586-23-5)
- 1-(5-(2-Hydroxy-3-methoxyphenyl)-3-(thiophen-2-yl)-4,5-dihydro-1H-pyrazol-1-yl)butan-1-one (CAS 923221-34-5)
- 2-((4-Fluorobenzyl)thio)-1,5-di-p-tolyl-1H-imidazole (CAS 1207042-56-5)
- 2-(3-Aminopropyl)-6-(pyridin-3-yl)pyridazin-3(2h)-one (CAS 1283109-59-0)
- Semaglutide Impurity 192 (CAS CATO-C4X-2226192)
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