4-Bromo-2-chloro-5-(difluoromethyl)-3-methoxypyridine CAS 1804686-29-0
| CAS No. | 1804686-29-0 |
| Molecular Formula | C7H5BrClF2NO |
| Molecular Weight | 272.47 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Owing to an amide group, a hydroxyl group, an ether linkage, fluorine/chlorine/bromine substitution, an aromatic ring system, 4-Bromo-2-chloro-5-(difluoromethyl)-3-methoxypyridine is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 272.47 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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).
4-Bromo-2-chloro-5-(difluoromethyl)-3-methoxypyridine (CAS 1804686-29-0), molecular formula C7H5BrClF2NO and molecular weight 272.47 g/mol, is a CATO reference standard with documented purity and traceability.
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 | C7H5BrClF2NO |
| Molecular Weight | 272.47 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor, faint amine-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 |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1995 |
| Halogen Content | F/Cl/Br-containing |
| Nitrogen Atoms | 1 |
Related Bromo Standards
- 4-Bromo-2-chloro-6-(difluoromethyl)-3-methoxypyridine (CAS 1803688-45-0)
- 4-Bromo-3-chloro-2-(difluoromethyl)-6-methoxypyridine (CAS 1803688-56-3)
- (4-Bromo-6-chloro-5-(difluoromethyl)pyridin-2-yl)methanol (CAS 1804459-76-4)
- (6-Bromo-5-chloro-3-(difluoromethyl)pyridin-2-yl)methanol (CAS 1804656-18-5)
- 4-Bromo-3-chloro-5-(difluoromethyl)pyridine-2-methanol (CAS 1804656-25-4)
- 6-Bromo-5-(chloromethyl)-4-(difluoromethyl)pyridin-3-ol (CAS 1804660-29-4)
- 6-Bromo-2-(chloromethyl)-5-(difluoromethyl)pyridin-3-ol (CAS 1804660-37-4)
- 4-Bromo-5-(chloromethyl)-3-(difluoromethyl)-2-hydroxypyridine (CAS 1804842-09-8)
Recommended Standards
- 2-Bromo-3-chloro-6-(difluoromethyl)-5-methoxypyridine (CAS 1805088-27-0)
- (6-Bromo-5-chloro-4-(difluoromethyl)pyridin-2-yl)methanol (CAS 1805229-23-5)
- (6-Bromo-4-chloro-5-(difluoromethyl)pyridin-3-yl)methanol (CAS 1805229-32-6)
- 2-Bromo-6-chloro-3-(difluoromethyl)-5-methoxypyridine (CAS 1805350-31-5)
- Ethyl 2,2-difluoro-2-(6-formylpyridin-2-yl)acetate (CAS 2766869-55-8)
- (1R)-1-(4-fluorophenyl)propyl acetate (CAS 245726-03-8)
- 2-(2,4-Difluorophenyl)amino-5-(salicylamid-5yl)-1,3-thiazole (CAS 887267-25-6)
- 1-(4-bromo-2-fluorophenyl)prop-2-yn-1-one (CAS 1601693-72-4)
- 2-(4-Acetylpiperazin-1-yl)pyridine-4-carbonitrile (CAS 1016809-01-0)
- Phenyl (2,5-dimethoxyphenyl)carbamate (CAS 141717-92-2)
- Methyl 2-(5-chloro-3-methyl-1,2-oxazol-4-yl)acetate (CAS 1239772-79-2)
- 8-Oxononanoic acid (CAS 25542-64-7)
- (E)-2,2,2-Trifluoroacetaldehyde oxime (CAS 67813-06-3)
- (Glu9)-Exenatide (2-39) trifluoroacetate salt (CAS 196109-34-9)
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