acetic 3-fluoro-4-hydroxy-5-methyl-2-oxohexanoic anhydride CAS 685-75-6
| CAS No. | 685-75-6 |
| Molecular Formula | C9H13FO5 |
| Molecular Weight | 220.19 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 220.19 g/mol gives acetic 3-fluoro-4-hydroxy-5-methyl-2-oxohexanoic anhydride distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
acetic 3-fluoro-4-hydroxy-5-methyl-2-oxohexanoic anhydride (CAS 685-75-6), molecular formula C9H13FO5 and molecular weight 220.19 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to a carboxylic acid group, a hydroxyl group, an ether linkage, fluorine substitution, acetic 3-fluoro-4-hydroxy-5-methyl-2-oxohexanoic anhydride is typically white to off-white crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 220.19 g/mol — guide the selection of appropriate sample preparation and analytical techniques. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
As a certified reference material (CRM), acetic 3-fluoro-4-hydroxy-5-methyl-2-oxohexanoic anhydride meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Physical & Chemical Properties
| Molecular Formula | C9H13FO5 |
| Molecular Weight | 220.19 g/mol |
| Purity | 97%+ |
| Storage | Store in a cool place (≤25°C), 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; Hygroscopic; reseal immediately after opening; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 3.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1957 |
| Halogen Content | F-containing |
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