Valaciclovir Impurity 36 CAS 19542-54-2
| CAS No. | 19542-54-2 |
| Molecular Formula | C18H26N2O5 |
| Molecular Weight | 350.41 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of Valaciclovir Impurity 36 is closely related to a flavonoid core, an amide group, a hydroxyl group, an ether linkage in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
Valaciclovir Impurity 36 (CAS 19542-54-2) is a certified pharmaceutical impurity reference standard with the molecular formula C18H26N2O5 and a molecular weight of 350.41 g/mol.
Valaciclovir Impurity 36 (C18H26N2O5) contains a flavonoid core, an amide group, a hydroxyl group, an ether linkage. It is notably hygroscopic, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. 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).
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 manufactures Valaciclovir Impurity 36 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 | C18H26N2O5 |
| Molecular Weight | 350.41 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 |
| CAS Registry Year (est.) | 1962 |
| Nitrogen Atoms | 2 |
Related Valaciclovir Standards
- Valaciclovir EP Impurity M (CAS 847670-62-6)
- Valaciclovir EP Impurity D (CAS 1346747-69-0)
- Valaciclovir Impurity 37 (CAS CATO-C4X-124837)
- Valaciclovir Impurity 42 (CAS 73504-31-1)
- Valaciclovir EP Impurity J (CAS 142963-63-1)
- Valaciclovir EP Impurity C (CAS 1346747-65-6)
- Valaciclovir EP Impurity R (CAS 142963-59-5)
- Valaciclovir EP Impurity R (CAS 142963-60-8)
Recommended Standards
- Terbutaline Impurity 58 (CAS CATO-C4X-118358)
- Avibactam Impurity 140 (CAS CATO-C4X-1348140)
- Rosuvastatin Impurity 242 (CAS CATO-C4X-1169242)
- Warfarin Impurity 17 (CAS CATO-C4X-142917)
- Nalmefene impurity 20 (CAS 738552-29-9)
- Letrozole Impurity 36 (CAS CATO-C4X-182936)
- Saxagliptin Impurity 35 Mesylate (CAS 1564266-70-1)
- 2-(2-Methylpiperidin-1-yl)acetohydrazide (CAS 946686-25-5)
- Methyl 3-[4-(methylsulfanyl)phenyl]-5-nitrobenzoate (CAS 1820604-58-7)
- 1-(Furan-2-carbonyl)-4-(naphthalene-2-sulfonyl)piperazine (CAS 428827-12-7)
- 2-(4-(4-(1-hydroxyethyl)phenyl)-1H-1,2,3-triazol-1-yl)acetic acid (CAS 2035032-87-0)
- (5-Bromo-1-methyl-1H-indazol-3-yl)methanol (CAS 1352494-93-9)
- 3-hydroxypyridazine-4-carbaldehyde (CAS 1936127-37-5)
- Insulin Degludec Impurity 11 (CAS CATO-C4X-215711)
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