4-Amino-6-methoxyquinazolin-7-ol CAS 320365-90-0
| CAS No. | 320365-90-0 |
| Molecular Formula | C9H9N3O2 |
| Molecular Weight | 191.19 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.
4-Amino-6-methoxyquinazolin-7-ol (CAS 320365-90-0), molecular formula C9H9N3O2 and molecular weight 191.19 g/mol, is a CATO reference standard with documented purity and traceability.
The molecular framework of 4-Amino-6-methoxyquinazolin-7-ol (C9H9N3O2) is characterized by an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage. 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. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C9H9N3O2 |
| Molecular Weight | 191.19 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, 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.) | 2025 |
| Nitrogen Atoms | 3 |
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Recommended Standards
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- 4-methoxy-3-(1H-1,2,3,4-tetrazol-1-yl)aniline (CAS 891017-36-0)
- N-[(5-Chloro-8-hydroxyquinolin-7-yl)(phenyl)methyl]acetamide (CAS 332939-46-5)
- 8,10,17-triazatetracyclo[8.7.0.0²,⁷.0¹¹,¹⁶]heptadeca-1(17),2,4,6,8,11(16),12,14-octaene-9-thiol (CAS 24192-82-3)
- 3-(4-Chloro-3-ethoxy-2-fluorophenyl)propanoic acid (CAS 1323966-45-5)
- (R)-1-benzyl-5-(chloromethyl)pyrrolidin-2-one (CAS 1272755-28-8)
- 5-(4-Methoxyphenyl)-5-methyl-3-(naphthalen-1-yl)-4,5-dihydroisoxazole (CAS 653601-95-7)
- 6,7-dichloro-2,3-dihydro-1-benzofuran-3-amine hydrochloride (CAS 1258639-72-3)
- (1-Ethoxy-2,2-dimethylcyclopropoxy)trimethylsilane (CAS 178440-22-7)
- 2-((1-Methylpiperidin-4-yl)methoxy)ethanamine (CAS 1353957-28-4)
- 1-[(2-Fluorophenyl)methyl]-4-nitro-1h-pyrazole (CAS 333311-67-4)
- Semaglutide Impurity 163 (x TFA Salt) (CAS CATO-C4X-2226163)
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