5H-Pyrano[4,3-d]pyrimidine CAS 23134-80-7
| CAS No. | 23134-80-7 |
| Molecular Formula | C7H6N2O |
| Molecular Weight | 134.14 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
5H-Pyrano[4,3-d]pyrimidine (CAS 23134-80-7) is a high-purity analytical reference standard with the molecular formula C7H6N2O and a molecular weight of 134.14 g/mol.
Structurally, 5H-Pyrano[4,3-d]pyrimidine (C7H6N2O) contains an amide group, a hydroxyl group, an ether linkage, an aromatic ring system. The molecule exhibits a degree of unsaturation (DBE) of 6.0, corresponding to approximately 6 ring(s) or double-bond equivalent(s). With a molecular weight of 134.14 g/mol, it falls into the low-molecular-weight range. 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.
Physical & Chemical Properties
| Molecular Formula | C7H6N2O |
| Molecular Weight | 134.14 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1963 |
| Nitrogen Atoms | 2 |
Related H Standards
- 1H-Pyrano[3,2-d]pyrimidine (CAS 35760-28-2)
- 1H-Pyrano[3,4-d]pyrimidine (CAS 36328-05-9)
- 5H-Pyrano[2,3-d]pyrimidine (CAS 41688-96-4)
- 7H-Pyrano[2,3-d]pyrimidine (CAS 254-69-3)
- 8H-pyrano[3,4-b]pyridin-8-one (CAS 134407-96-8)
- 4H-pyrano[3,2-b]pyridin-4-one (CAS 2060008-39-9)
- 7H-Pyrano[2,3-d]pyrimidin-7-one (CAS 4425-51-8)
- 2H-Pyrano[2,3-b]pyridin-3(4H)-one (CAS 1211515-40-0)
Recommended Standards
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- 5-Formyl-1-methyl-1H-pyrrole-2-carbonitrile (CAS 81698-03-5)
- 2-(3-Hydroxypyrrolidin-1-yl)-1-(4-methylpiperidin-1-yl)ethan-1-one (CAS 1485518-46-4)
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- 2-Nitrophenyl β-D-fucopyranoside (CAS 1154-94-5)
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