Dimethyl 2-fluoro-5-methylterephthalate CAS 1203953-08-5
| CAS No. | 1203953-08-5 |
| Molecular Formula | C11H11FO4 |
| Molecular Weight | 226.20 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Dimethyl 2-fluoro-5-methylterephthalate (CAS 1203953-08-5), molecular formula C11H11FO4 and molecular weight 226.20 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C11H11FO4, Dimethyl 2-fluoro-5-methylterephthalate contains a carboxylic acid group, a hydroxyl group, an ether linkage, fluorine substitution, an aromatic ring system; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 226.20 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.
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 | C11H11FO4 |
| Molecular Weight | 226.20 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-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) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1990 |
| Halogen Content | F-containing |
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- 6,6′-disulfodinicotinic acid (CAS 15658-35-2)
- Methyl 5-bromo-2-chlorothiazole-4-carboxylate (CAS 1784255-01-1)
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- Methyl1-(3-cyanobenzyl)-3-formyl-1H-indole-5-carboxylate (CAS 925889-73-2)
- Macrophage Inhibitory Peptide (CAS 41961-56-2)
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