6,7-Dimethoxy-3-methylquinazoline-2,4(1H,3H)-dione CAS 20197-88-0
| CAS No. | 20197-88-0 |
| Molecular Formula | C11H12N2O4 |
| Molecular Weight | 236.22 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
6,7-Dimethoxy-3-methylquinazoline-2,4(1H,3H)-dione (CAS 20197-88-0), molecular formula C11H12N2O4 and molecular weight 236.22 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C11H12N2O4, 6,7-Dimethoxy-3-methylquinazoline-2,4(1H,3H)-dione contains an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 236.22 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.
Physical & Chemical Properties
| Molecular Formula | C11H12N2O4 |
| Molecular Weight | 236.22 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO |
| 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 Dimethoxy Standards
- 6,7-Dimethoxy-1-oxo-2,3-dihydro-1H-indene-4-carboxylic acid (CAS 148050-74-2)
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- 6,7-Dimethoxy-3-methylbenzofuran-2-carboxylic acid (CAS 63445-53-4)
- 6,7-Dimethoxy-8-nitro-3,4-dihydroisoquinoline (CAS 917892-74-1)
- Methyl 5,6-dimethoxy-1H-indazole-3-carboxylate (CAS 885279-34-5)
- 3,5-Dimethoxy-alpha-(trifluoromethyl)benzyl Alcohol (CAS 1247789-27-0)
- (3,4-Dimethoxy-2-(trifluoromethyl)phenyl)methanol (CAS 138490-98-9)
- 2,6-Dimethoxy-4-(prop-1-en-1-yl)phenyl acetate (CAS 29540-10-1)
Recommended Standards
- 5-Methoxy-3-(2-methoxy-5-methylphenyl)-1,3,4-oxadiazol-2(3H)-one (CAS 98414-86-9)
- 7-(difluoromethyl)-5-methyl-[1,2,4]triazolo[1,5-a]pyrimidine-2-carboxylic acid (CAS 445025-82-1)
- 5-Ethynyl-1-((2S,4S,5R)-4-hydroxy-5-(hydroxymethyl)tetrahydrofuran-2-yl)pyrimidin-2(1H)-one (CAS 93265-82-8)
- 7-Chloro-9H-fluoren-2-amine (CAS 6957-62-6)
- 2-Bromo-1-(4-bromo-2-chlorophenyl)ethan-1-one (CAS 252561-82-3)
- 1H-4,7-Methanopyrrolo[3,4-c]pyridine (CAS 126877-33-6)
- N-(3-(1H-imidazol-1-yl)propyl)-6-fluorobenzo[d]thiazol-2-amine (CAS 1177312-12-7)
- Ethyl 6-ethoxy-4-hydroxyquinoline-3-carboxylate (CAS 303121-08-6)
- 3-Hydroxy-4-methoxybenzenepropanol (CAS 57627-75-5)
- 1-Phenyl-2-(pyridin-4-yl)ethanamine oxalate (CAS 1956380-45-2)
- (S)-2-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)-4-(naphthalen-2-yl)butanoic acid (CAS 1260587-11-8)
- 3-(2,4-Dichloro-5-isopropoxyphenyl)-5-(1-hydroxy-2-methylpropan-2-yl)-1,3,4-oxadiazol-2(3H)-one (CAS 54996-61-1)
- 5-Hydroxy-1,3,3-trimethylindolin-2-one (CAS 120713-58-8)
- His-Cyclic-Semaglutide (CAS CATO-C4X-2226182)
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