5-Methoxybenzofurazan-1-oxide CAS 7791-49-3
| CAS No. | 7791-49-3 |
| Molecular Formula | C7H6N2O3 |
| Molecular Weight | 166.13 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies 5-Methoxybenzofurazan-1-oxide (CAS 7791-49-3), a certified reference material (molecular formula C7H6N2O3, MW 166.13 g/mol) for analytical method development and quality control.
Based on its molecular formula C7H6N2O3, 5-Methoxybenzofurazan-1-oxide 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 166.13 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.
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 | C7H6N2O3 |
| Molecular Weight | 166.13 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 methanol, ethanol, DMSO, water |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1959 |
| Nitrogen Atoms | 2 |
Related Methoxybenzofurazan Standards
Recommended Standards
- 5-Methyl-3-nitropicolinaldehyde (CAS 52381-07-4)
- 5-Hydroxy-2H-pyrido[3,2-b][1,4]oxazin-3(5H)-one (CAS 956462-80-9)
- 5-Nitro-2,3-dihydrofuro[3,2-b]pyridine (CAS 95837-10-8)
- 5-Carbamoylpyridine-2-carboxylic acid (CAS 24242-18-0)
- 3-(3,3-Difluoroazetidin-1-yl)-4-nitrobenzaldehyde (CAS 1779119-35-5)
- 5-Bromo-2-fluoro-3-nitropyridine (CAS 886372-98-1)
- 3-Cyano-N-(furan-3-ylmethyl)-N-(thiophen-2-ylmethyl)benzamide (CAS 1421451-70-8)
- N-Benzyl-4,5-dimethylbenzo[d]thiazol-2-amine (CAS 743452-37-1)
- 4-Amino-5-(pentyloxy)dihydrofuran-2(3H)-one (CAS 370875-27-7)
- 1,4,9-Trimethyl-9H-carbazole (CAS 18024-11-8)
- (E)-[(2,4-Dichlorophenyl)methoxy]({2-[(2,4-dichlorophenyl)sulfanyl]pyridin-3-yl}methylidene)amine (CAS 478031-13-9)
- 7-Methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine (CAS 1001003-42-4)
- n-[4-(1-aminoethyl)phenyl]methanesulfonamide (CAS 401909-83-9)
- Semaglutide impurity 201 (CAS CATO-C4X-2226201)
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