| CAS No. | 139756-23-3 |
| Molecular Formula | C18H22N4O2 |
| Molecular Weight | 326.39 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
The occurrence of 1-Methyl-5-(2-propoxyphenyl)-3-propyl-1H-pyrazolo[4,3-d]pyrimidin-7(6H)-one, 98% is closely related to a steroid core, an amide group, a hydroxyl group, an ether linkage in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
1-Methyl-5-(2-propoxyphenyl)-3-propyl-1H-pyrazolo[4,3-d]pyrimidin-7(6H)-one, 98% (CAS 139756-23-3) is a high-purity analytical reference standard with the molecular formula C18H22N4O2 and a molecular weight of 326.39 g/mol.
Owing to a steroid core, an amide group, a hydroxyl group, an ether linkage, 1-Methyl-5-(2-propoxyphenyl)-3-propyl-1H-pyrazolo[4,3-d]pyrimidin-7(6H)-one, 98% is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 326.39 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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).
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.
| Molecular Formula | C18H22N4O2 |
| Molecular Weight | 326.39 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| 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) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1996 |
| Nitrogen Atoms | 4 |