Acyclovir Impurity 5 CAS 19962-37-9
| CAS No. | 19962-37-9 |
| Molecular Formula | C7H7N5O2 |
| Molecular Weight | 193.16 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), Acyclovir Impurity 5 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.
CATO supplies Acyclovir Impurity 5 (CAS 19962-37-9), a pharmacopoeial impurity reference standard (molecular formula C7H7N5O2, MW 193.16 g/mol) used for the identification and quantification of trace impurities in APIs.
Owing to an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage, Acyclovir Impurity 5 is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 193.16 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.
Physical & Chemical Properties
| Molecular Formula | C7H7N5O2 |
| Molecular Weight | 193.16 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (faint amine-like odor) |
| 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 |
| CAS Registry Year (est.) | 1962 |
| Nitrogen Atoms | 5 |
Related Acyclovir Standards
Recommended Standards
- Folic Acid Impurity 25 (CAS 694514-39-1)
- 2-Methyl-7-oxo-4,7-dihydropyrazolo[1,5-a]pyrimidine-6-carboxylic acid 6911AC 98555-13-6 C8H7N3O3 (CAS 98555-13-6)
- Folic Acid Impurity 28 (CAS 712-29-8)
- 2-Bromo-3-(trimethylsilyl)propene 2-Bromoallyltrimethylsilane 81790-10-5 (CAS 81790-10-5)
- Dapoxetine Impurity 29 (CAS CATO-C4X-143929)
- Roxadustat Impurity 52 (CAS CATO-C4X-221352)
- Azithromycin Impurity 4 (CAS CATO-C4X-10034)
- 1-(4-Hydroxy-6-methylpyrimidin-2-yl)-3-phenylguanidine (CAS 16018-52-3)
- (1-Benzyl-2-trifluoromethylsulfanyl-ethyl)-(3-bromo-benzyl)-amine (CAS 1208078-58-3)
- 3-(4-(Diethylamino)phenyl)pentan-3-ol (CAS 1443328-16-2)
- (3S,4S)-3-amino-4-methyloxetan-2-one (CAS 131232-74-1)
- (4-Isopropylphenyl)(isoquinolin-4-yl)methanone (CAS 1187169-62-5)
- 4-Bromo-2-fluoro-3-nitrophenylboronic acid (CAS 2377606-27-2)
- 3AEEA-Semaglutide(Endo-AEEA-Semaglutide) (CAS CATO-C4X-2226265)
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