4-Ethynyl-2,5-difluorobenzoic acid CAS 2490398-41-7
| CAS No. | 2490398-41-7 |
| Molecular Formula | C9H4F2O2 |
| Molecular Weight | 182.12 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
4-Ethynyl-2,5-difluorobenzoic acid (CAS 2490398-41-7), molecular formula C9H4F2O2 and molecular weight 182.12 g/mol, is a CATO reference standard with documented purity and traceability.
The molecular framework of 4-Ethynyl-2,5-difluorobenzoic acid (C9H4F2O2) is characterized by a carboxylic acid group, a hydroxyl group, an ether linkage, fluorine substitution, an aromatic ring system. In reversed-phase chromatography, its retention is governed primarily by the polarity and ionization state of its functional groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
CATO manufactures 4-Ethynyl-2,5-difluorobenzoic acid under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C9H4F2O2 |
| Molecular Weight | 182.12 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor, low volatility) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2000 |
| Halogen Content | F-containing |
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Recommended Standards
- 3-(3,5-Difluorophenyl)propiolic acid (CAS 935475-83-5)
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- Dimethyl (2R,3R)-2,3-difluorosuccinate (CAS 71974-84-0)
- 3-(2,6-Difluorophenyl)prop-2-ynoic acid (CAS 935475-84-6)
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- tert-Butyl 6-isopropylnicotinate (CAS 1623003-12-2)
- 6-Bromo-7-chloro-1H-indazole (CAS 1427405-47-7)
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Why CATO?
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