4-Fluorobenzoic anhydride CAS 25569-77-1
| CAS No. | 25569-77-1 |
| Molecular Formula | C14H8F2O3 |
| Molecular Weight | 262.21 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
4-Fluorobenzoic anhydride (CAS 25569-77-1), molecular formula C14H8F2O3 and molecular weight 262.21 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C14H8F2O3, 4-Fluorobenzoic anhydride contains a carboxylic acid group, a hydroxyl group, an ether linkage, fluorine substitution, a polycyclic aromatic system; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 262.21 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C14H8F2O3 |
| Molecular Weight | 262.21 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor, low volatility) |
| 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 chloroform, dichloromethane, ethyl acetate, 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) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1964 |
| Halogen Content | F-containing |
Related Fluorobenzoic Standards
- 4-fluorobenzoic acid [2-oxo-2-[3-(trifluoromethyl)anilino]ethyl] ester 42059-81-4 A825743 [2-oxidanylidene-2-[[3-(trifluoromethyl)phenyl]amino]ethyl] 4-fluoranylbenzoate (CAS 42059-81-4)
- 4-Acetyl-2-fluorobenzoic acid (CAS 1029714-95-1)
- 2-Acetyl-4-fluorobenzoic acid (CAS 1334325-35-7)
- 3-Acetyl-4-fluorobenzoic acid (CAS 1505662-44-1)
- 2-Acetyl-6-fluorobenzoic acid (CAS 167412-22-8)
- 4-ETHYL-3-FLUOROBENZOIC ACID (CAS 1142924-72-8)
- 5-Ethyl-2-fluorobenzoic acid (CAS 1261451-93-7)
- 3-Ethyl-5-fluorobenzoic acid (CAS 1261843-53-1)
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