6-fluoro-3-methyl-2-oxo-1,3-benzoxazole-5-carboxylic acid CAS 2387597-49-9
| CAS No. | 2387597-49-9 |
| Molecular Formula | C9H12FNO4 |
| Molecular Weight | 217.19 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including 6-fluoro-3-methyl-2-oxo-1,3-benzoxazole-5-carboxylic acid.
6-fluoro-3-methyl-2-oxo-1,3-benzoxazole-5-carboxylic acid (CAS 2387597-49-9), molecular formula C9H12FNO4 and molecular weight 217.19 g/mol, is a CATO reference standard with documented purity and traceability.
The molecular framework of 6-fluoro-3-methyl-2-oxo-1,3-benzoxazole-5-carboxylic acid (C9H12FNO4) is characterized by a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, fluorine substitution. 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.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
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 | C9H12FNO4 |
| Molecular Weight | 217.19 g/mol |
| Appearance | Off-white to pale 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) | 4.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1999 |
| Halogen Content | F-containing |
| Nitrogen Atoms | 1 |
Related fluoro Standards
- 2-(4-fluoro-2-oxo-1,3-benzoxazol-3-yl)acetic acid (CAS 1538107-82-2)
- 4-fluoro-3-methyl-2-oxo-1,3-benzoxazole-6-carboxylic acid (CAS 1556384-16-7)
- 4-fluoro-3-methyl-2-oxo-1,3-benzoxazole-5-carboxylic acid (CAS 2387596-14-5)
- 4-fluoro-3-methyl-2-oxo-1,3-benzoxazole-7-carboxylic acid (CAS 2387595-25-5)
- 5-fluoro-3-methyl-2-oxo-1,3-benzoxazole-4-carboxylic acid (CAS 2387594-64-9)
- 5-fluoro-3-methyl-2-oxo-1,3-benzoxazole-6-carboxylic acid (CAS 2387598-86-7)
- 5-fluoro-3-methyl-2-oxo-1,3-benzoxazole-7-carboxylic acid (CAS 2387595-88-0)
- 5-fluoro-3-methyl-6-nitro-3H-isobenzofuran-1-one (CAS 2231233-90-0)
Recommended Standards
- 6-fluoro-3-methyl-2-oxo-1,3-benzoxazole-4-carboxylic acid (CAS 2387597-60-4)
- 6-fluoro-3-methyl-2-oxo-1,3-benzoxazole-7-carboxylic acid (CAS 445219-44-3)
- 6-(Trifluoromethyl)chroman-4-amine (CAS 939758-85-7)
- 7-(Trifluoromethoxy)-1,2,3,4-tetrahydroisoquinoline (CAS 199678-30-3)
- 4-Bromo-3,5-dimethylpyridine hydrochloride (CAS 1794738-16-1)
- 2,3-Dichloro-2,3-dihydronaphthalene-1,4-dione (CAS 1013-00-9)
- 2-{1h-pyrrolo[3,2-b]pyridin-3-yl}acetonitrile (CAS 554453-19-9)
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- 2-(Pyridin-3-yl)thiazole-4-carbohydrazide (CAS 874784-24-4)
- 7-Amino-3-isopropyl-1H-pyrazolo[5,1-c][1,2,4]triazole-6-carboxylic acid (CAS 227611-29-2)
- 1,1'-[2-[[3-[[(9Z)-1-OXo-9-octadecen-1-yl]oxy]-2,2-bis[[[(9Z)-1-oxo-9-octadecen-1-yl]oxy]methyl]propoxy]methyl]-2-[[[(9Z)-1-oxo-9-octadecen-1-yl]oxy]methyl]-1,3-propanediyl] di-(9Z)-9-octadecenoate (CAS 70984-13-3)
- Procyanidin B5 (CAS 12798-57-1)
- 3-Methyl-1,2,3,4-tetrahydroquinoxaline-5-carboxylic acid (CAS 946386-75-0)
- TRAF6 Control Peptide trifluoroacetate salt (CAS 852690-80-3)
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