4-Chloro-2-fluoro-3-methoxyphenol CAS 1993479-29-0
| CAS No. | 1993479-29-0 |
| Molecular Formula | C7H6ClFO2 |
| Molecular Weight | 176.57 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-Chloro-2-fluoro-3-methoxyphenol (CAS 1993479-29-0), molecular formula C7H6ClFO2 and molecular weight 176.57 g/mol, is a CATO reference standard with documented purity and traceability.
4-Chloro-2-fluoro-3-methoxyphenol (C7H6ClFO2) contains a carboxylic acid group, a hydroxyl group, an ether linkage, fluorine/chlorine substitution, an aromatic ring system. Halogen substitution raises its density and boiling point, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. 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).
This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.
Physical & Chemical Properties
| Molecular Formula | C7H6ClFO2 |
| Molecular Weight | 176.57 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor, low volatility) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, 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) | 4.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1996 |
| Halogen Content | F/Cl-containing |
Related Chloro Standards
- 3-Chloro-5-fluoro-4-methoxyphenol (CAS 1017777-55-7)
- 2-Chloro-6-fluoro-3-methoxyphenol (CAS 1017777-60-4)
- 6-Chloro-2-fluoro-3-methoxyphenol (CAS 1017777-74-0)
- 5-Chloro-2-fluoro-4-methoxyphenol (CAS 1394953-79-7)
- 3-Chloro-2-fluoro-4-methoxyphenol (CAS 1781486-60-9)
- 3-Chloro-6-fluoro-2-methoxyphenol (CAS 1781486-66-5)
- 3-Chloro-4-fluoro-2-methoxyphenol (CAS 1783512-32-2)
- 4-Chloro-3-fluoro-2-methoxyphenol (CAS 1783512-40-2)
Recommended Standards
- 3-Chloro-5-fluoro-4-(hydroxymethyl)phenol (CAS 438050-33-0)
- Ammoxetine Impurity 11 (CAS CATO-C4X-335711)
- (1S)-2,2-difluorocyclopropanesulfonyl chloride (CAS 2740630-26-4)
- Ammoxetine Impurity 12 (CAS CATO-C4X-335712)
- Tert-butyl ((2,3-dihydrobenzofuran-6-yl)methyl)(piperidin-3-yl)carbamate (CAS 1206970-42-4)
- Butyl(3-phenylbutyl)amine hydrochloride (CAS 1240581-91-2)
- 3-Chloro-6-(3-chlorophenyl)pyridazine (CAS 66548-94-5)
- 2-(3-Bromophenyl)cyclopropanecarboxylic Acid (CAS 91445-84-0)
- 2-(Piperidin-3-ylmethoxy)-5-(trifluoromethyl)pyridine (CAS 1220176-72-6)
- 4-(3-(Trifluoromethyl)phenyl)piperidin-4-ol hydrochloride (CAS 1683-49-4)
- 8-Bromochroman-3-ol (CAS 133118-79-3)
- 4-Methyl-5-oxo-2,5-dihydrofuran-3-carbohydrazide (CAS 137910-48-6)
- (Z)-N-(Furan-2-ylmethylene)aniline (CAS 113882-56-7)
- Semaglutide impurity 196 (CAS CATO-C4X-2226196)
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