7-Methylpyrimido[4,5-d]pyrimidin-4(3H)-one CAS 120208-35-7
| CAS No. | 120208-35-7 |
| Molecular Formula | C7H6N4O |
| Molecular Weight | 162.15 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
7-Methylpyrimido[4,5-d]pyrimidin-4(3H)-one (CAS 120208-35-7), molecular formula C7H6N4O and molecular weight 162.15 g/mol, is a CATO reference standard with documented purity and traceability.
The molecular framework of 7-Methylpyrimido[4,5-d]pyrimidin-4(3H)-one (C7H6N4O) is characterized by an amide group, a hydroxyl group, an ether linkage, an aromatic ring system. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
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 | C7H6N4O |
| Molecular Weight | 162.15 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (faint amine-like odor) |
| 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) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1991 |
| Nitrogen Atoms | 4 |
Related Methylpyrimido Standards
- 3-Methylpyrimido[5,4-e][1,2,4]triazine (CAS 25624-60-6)
- 3-Methylpyrimido[4,5-c]pyridazine-5,7(6H,8H)-dione (CAS 20886-73-1)
- 7-Methylpyrimido[4,5-b]quinolin-2-amine (CAS 582334-04-1)
- 9-MEthylpyrimido[4,5-b]quinolin-2-amine (CAS 582334-03-0)
- 10-Methylpyrimido[4,5-b]quinoline-2,4(3H,10H)-dione (CAS 27132-53-2)
Recommended Standards
- 3-Phenyl-1,2,3-oxadiazol-3-ium-5-olate (CAS 120-06-9)
- 6-Ethynyl-2-methyl-3-nitropyridine (CAS 1204333-42-5)
- 5-Phenyl-3H-1,3,4-oxadiazol-2-one (CAS 1199-02-6)
- 2-(6-cyanopyridin-3-yl)acetic acid (CAS 1211526-77-0)
- 1,2-Dihexanoyl-sn-glycerol (CAS 30403-47-5)
- 1-(2-Methylpiperazin-1-yl)nonan-1-one hydrochloride (CAS 1578174-71-6)
- Manganese x2-ethylhexanoate (CAS 15956-58-8)
- 1-(2-Methyl-3-(trifluoromethyl)phenyl)ethanamine hydrochloride (CAS 2703752-78-5)
- 3-Bromo-N,4-dimethylaniline, HCl (CAS 1187386-24-8)
- 3-(2H-1,2,3-Triazol-2-yl)propanoic acid (CAS 856863-30-4)
- 1-methoxynaphthalene-2-carbaldehyde (CAS 50493-10-2)
- (2-Cyclobutoxy-5-fluoropyridin-4-yl)boronic acid (CAS 2225179-65-5)
- 2,4-Diphenyl-6-(4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)pyrimidine (CAS 1536209-84-3)
- Semaglutide impurity 41 (CAS CATO-C4X-222641)
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