Aciclovir EP Impurity B Hydrochloride CAS 635-39-2
| CAS No. | 635-39-2 |
| Molecular Formula | C5H5N5O |
| Molecular Weight | N/A |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
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.
CATO supplies Aciclovir EP Impurity B Hydrochloride (CAS 635-39-2), a pharmacopoeial impurity reference standard (molecular formula C5H5N5OHCl, MW 187.59 g/mol) used for the identification and quantification of trace impurities in APIs.
Based on its molecular formula C5H5N5OHCl, Aciclovir EP Impurity B Hydrochloride contains an amide group, a hydroxyl group, an ether linkage, chlorine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 187.59 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
CATO manufactures Aciclovir EP Impurity B Hydrochloride under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C5H5N5O HCl |
| Molecular Weight | 187.59 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor, faint amine-like odor) |
| Purity | >98% |
| Storage | Store at 2-8°C, protect from light, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1957 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 5 |
Related Aciclovir Standards
- Aciclovir EP Impurity F (CAS 110104-37-5)
- Aciclovir Impurity 39 (CAS 1417988-85-2)
- Aciclovir EP Impurity J (CAS 166762-90-9)
- Aciclovir EP Impurity K (CAS 1797131-64-6)
- Aciclovir EP Impurity I (CAS 1797832-75-7)
- Aciclovir EP Impurity L (CAS 3056-33-5)
- Aciclovir Impurity 30 (CAS 59277-91-7)
- Aciclovir EP Impurity G (CAS 75128-73-3)
Recommended Standards
- Trilostane Impurity 5 (CAS CATO-C4X-21375)
- Posaconazole Impurity 56 (CAS 184177-81-9)
- Eplerenone Impurity 16 (CAS CATO-C4X-163016)
- 1-(Aminomethyl)cyclopentane-1-carboxamide (CAS 1027337-88-7)
- 2-Methyl-2-(4-nitrophenyl)propanoic Acid (CAS 42206-47-3)
- 1,7-Naphthyridine-4-carbaldehyde (CAS 2231676-79-0)
- 2,4',5-Trichlorobiphenyl-2',3',5',6'-d4 (CAS 1219794-87-2)
- N-((1-(hydroxymethyl)cyclohexyl)methyl)-4-methylbenzenesulfonamide (CAS 1216981-05-3)
- 1,4-Diethoxy-2-nitrobenzene (CAS 119-23-3)
- Neuropeptide Y (porcine) trifluoroacetate salt (CAS 83589-17-7)
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