4-Fluoro-3-iodobenzoic acid CAS 403-18-9
| CAS No. | 403-18-9 |
| Molecular Formula | C7H4FIO2 |
| Molecular Weight | 266.01 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Based on its molecular formula C7H4FIO2, 4-Fluoro-3-iodobenzoic acid contains a carboxylic acid group, a hydroxyl group, an ether linkage, fluorine/iodine substitution, an aromatic ring system; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 266.01 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.
4-Fluoro-3-iodobenzoic acid (CAS 403-18-9) is a high-purity analytical reference standard with the molecular formula C7H4FIO2 and a molecular weight of 266.01 g/mol.
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), 4-Fluoro-3-iodobenzoic acid 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 | C7H4FIO2 |
| Molecular Weight | 266.01 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor, low volatility) |
| Purity | 97%+ |
| Storage | Store at room temperature, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1957 |
| Halogen Content | F/I-containing |
Related Fluoro Standards
- 2-Fluoro-4-iodobenzoic acid (CAS 124700-40-9)
- 2-Fluoro-5-iodobenzoic Acid (CAS 124700-41-0)
- 2-Fluoro-5-iodoisonicotinamide (CAS 1803740-00-2)
- 3-Fluoro-5-iodopyridine-4-carboxamide (CAS 1803766-84-8)
- 2-Fluoro-6-iodoisonicotinamide (CAS 1803811-90-6)
- 3-Fluoro-5-iodopicolinamide (CAS 1806337-21-2)
- 3-Fluoro-6-iodopicolinamide (CAS 1806419-36-2)
- 5-Fluoro-4-iodopyridine-3-carboxamide (CAS 1806543-18-9)
Recommended Standards
- 4-Bromo-3-(trifluoromethoxy)benzonitrile (CAS 928136-78-1)
- 5-Bromo-2-(trifluoromethyl)benzo[d]oxazole (CAS 375369-08-7)
- 4-Bromo-2-hydroxy-3-(trifluoromethyl)benzonitrile (CAS 2385907-25-3)
- 3'-Trifluoromethylbiphenyl-4-boronic acid (CAS 1106837-36-8)
- 6-(3-Fluoro-4-methoxyphenyl)-2-methylpyrimidin-4-amine (CAS 1368883-65-1)
- 6-Bromo-1,4-dichlorophthalazine (CAS 240400-95-7)
- 5-(3-Fluorophenyl)-3-(trifluoromethyl)picolinic acid (CAS 1214366-04-7)
- 1-(Bromomethyl)-2-chloro-4-(trifluoromethoxy)benzene (CAS 1261642-94-7)
- 4-(1,3-Dioxo-1,3-dihydro-2H-pyrrolo[3,4-c]pyridin-2-yl)benzoic acid (CAS 1410664-43-5)
- N-Butyl-4-chloro-2-pyridinecarboxamide (CAS 1094306-27-0)
- 3-(Benzylthio)-6-(pyridin-4-yl)pyridazine (CAS 872701-38-7)
- 2,6-Difluoro-3-(trifluoromethyl)benzaldehyde (CAS 134099-24-4)
- 2-Bromo-5-methylhexanoic Acid (CAS 56256-78-1)
- Semaglutide impurity 195 (CAS CATO-C4X-2226195)
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