Aciclovir EP Impurity G CAS 75128-73-3
| CAS No. | 75128-73-3 |
| Molecular Formula | C12H15N5O5 |
| Molecular Weight | 309.28 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 309.28 g/mol gives Aciclovir EP Impurity G distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
Aciclovir EP Impurity G (CAS 75128-73-3) is a certified pharmaceutical impurity reference standard with the molecular formula C12H15N5O5 and a molecular weight of 309.28 g/mol.
Owing to an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage, Aciclovir EP Impurity G is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 309.28 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
This reference standard supports related-substances testing and method development in line with ICH Q3A/Q3B guidance on impurity control, and is suitable for system suitability testing and forced-degradation studies.
As a certified reference material (CRM), Aciclovir EP Impurity G 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 | C12H15N5O5 |
| Molecular Weight | 309.28 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 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) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1978 |
| Nitrogen Atoms | 5 |
Related Aciclovir Standards
- Aciclovir EP Impurity M (CAS 91702-60-2)
- Aciclovir Impurity 30 (CAS 59277-91-7)
- Aciclovir EP Impurity F (CAS 110104-37-5)
- Aciclovir Impurity 37 (CAS CATO-C4X-101037)
- Aciclovir Impurity 40 (CAS 97151-29-6)
- Aciclovir Impurity 29 (CAS CATO-C4X-101029)
- Aciclovir Impurity Q (CAS CATO-C4X-101038)
- Aciclovir Impurity 33 (CAS CATO-C4X-101033)
Recommended Standards
- N-(4-Methoxybenzyl)-4-(trifluoromethyl)benzamide (CAS 554408-00-3)
- N-(3-Methoxyphenyl)-2-[3-(trifluoromethyl)phenyl]acetamide (CAS 77620-69-0)
- Levosimendan Impurity 1 (CAS 252638-01-0)
- N-(2-Phenoxyethyl)-4-(trifluoromethyl)benzamide (CAS 879184-79-9)
- Sivelestat sodium Impurity 2 (CAS 150374-99-5)
- Mezlocillin Impurity 12 (CAS CATO-C4X-183112)
- Pranlukast Impurity 3 Hydrochloride (CAS 90005-55-3)
- Benzyl (1-(2-aminoacetyl)pyrrolidin-3-yl)(isopropyl)carbamate (CAS 1353954-17-2)
- 1-(4-methoxynaphthalen-1-yl)-2-methylpropan-1-one 36198-81-9 CTK4H6068 (CAS 36198-81-9)
- 4-(((3,4-Dichlorobenzyl)oxy)methyl)piperidine hydrochloride (CAS 1289388-66-4)
- 3-(2,3-Dimethyl-6-oxo-4-(trifluoromethyl)-2,6-dihydro-7h-pyrazolo[3,4-b]pyridin-7-yl)propanoic acid (CAS 1018128-02-3)
- Methyl 5-((methoxycarbonyl)oxy)indolizine-7-carboxylate (CAS 784150-88-5)
- 4,5-Dihydroxy-2-methoxy-6-((tosyloxy)methyl)tetrahydro-2H-pyran-3-yl 4-methylbenzenesulfonate (CAS 54497-89-1)
- Tau Peptide (244-274) (Repeat 1 Domain) trifluoroacetate salt (CAS 330456-24-1)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com