4-Chloro-6-methoxy-7-nitroquinazoline CAS 741655-67-4
| CAS No. | 741655-67-4 |
| Molecular Formula | C9H6ClN3O3 |
| Molecular Weight | 239.62 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies 4-Chloro-6-methoxy-7-nitroquinazoline (CAS 741655-67-4), a certified reference material (molecular formula C9H6ClN3O3, MW 239.62 g/mol) for analytical method development and quality control.
Based on its molecular formula C9H6ClN3O3, 4-Chloro-6-methoxy-7-nitroquinazoline contains a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, chlorine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 239.62 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
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.
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 | C9H6ClN3O3 |
| Molecular Weight | 239.62 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor, faint amine-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry, keep tightly closed to prevent evaporation |
| 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; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1986 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 3 |
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Recommended Standards
- 3-CHloro-2-(propan-2-yloxy)-5-(trifluoromethyl)pyridine (CAS 750608-07-2)
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- 3-(4-Chloro-3-nitrophenyl)-5-methyl-1,2,4-oxadiazole (CAS 92453-47-9)
- 5-(Chloromethyl)-3-(3-nitrophenyl)-1,2,4-oxadiazole (CAS 6595-78-4)
- Diflunisal 1-O-β-D-Glucuronide (CAS 58446-29-0)
- 2-fluoro-5-(1H-1,2,3,4-tetrazol-1-yl)aniline (CAS 924871-22-7)
- SD 2590 Hydrochloride (CAS 226395-93-3)
- Ethyl 1-(2-nitrophenyl)-5-oxo-2,5-dihydro-1H-1,2,4-triazole-3-carboxylate (CAS 1233509-86-8)
- 4-Methyl-8-(1-(phenylsulfonyl)-1H-indol-2-yl)dihydro-4l4,8l4-[1,3,2]oxazaborolo[2,3-b][1,3,2]oxazaborole-2,6(3H,5H)-dione (CAS 1158984-95-2)
- 4-((6-Fluoro-2,3-dihydro-2-methyl-3-oxobenzo[b][1,4]oxazin-4-yl)methyl)benzonitrile (CAS 1159978-64-9)
- 1-(5-Bromo-1-methyl-4-nitro-1H-pyrrol-2-yl)ethanone (CAS 199684-03-2)
- 2-(3-Chloro-2-methylpropyl)bicyclo[2.2.1]heptane (CAS 1559417-52-5)
- 2,2-Bis((2-cyanoacetoxy)methyl)propane-1,3-diyl bis(2-cyanoacetate) (CAS 178671-69-7)
- Peptide 434 (CAS CATO-CPTD788434)
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