ethyl 3-(chloromethyl)-5-methyl-1,2-oxazole-4-carboxylate CAS 266341-73-5
| CAS No. | 266341-73-5 |
| Molecular Formula | C8H10ClNO3 |
| Molecular Weight | 203.62 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
ethyl 3-(chloromethyl)-5-methyl-1,2-oxazole-4-carboxylate (CAS 266341-73-5) is a high-purity analytical reference standard with the molecular formula C8H10ClNO3 and a molecular weight of 203.62 g/mol.
Owing to a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, chlorine substitution, ethyl 3-(chloromethyl)-5-methyl-1,2-oxazole-4-carboxylate is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 203.62 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).
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 | C8H10ClNO3 |
| Molecular Weight | 203.62 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor, faint amine-like odor) |
| 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 methanol, ethanol, 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) | 4.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2025 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 1 |
Related ethyl Standards
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Recommended Standards
- 6-Chlorobenzo[cd]indol-2(1H)-one (CAS 24950-30-9)
- Pantoprazole Impurity 23 (CAS 953787-47-8)
- 5-(4-Chlorophenyl)furan-2-carbonitrile (CAS 52939-07-8)
- Ethyl 4-chloro-5-imino-2-methyl-2,5-dihydro-1h-pyrazole-3-carboxylate (CAS 1006494-35-4)
- 5-Chloro-6-methyl-N1-phenylbenzene-1,2-diamine (CAS 79759-93-6)
- 3-Amino-6-benzyl-7H-thiazolo[3,2-b][1,2,4]triazin-7-one (CAS 1707586-93-3)
- 3,3-Dimethyl-3-fluorobutyrophenone (CAS 898764-41-5)
- 5-(Difluoromethyl)pyrazolo[1,5-a]pyrimidine-2-carboxylic acid (CAS 1823843-51-1)
- (S)-1-Phenyldecan-1-ol (CAS 112419-76-8)
- 2-(5-(Difluoromethyl)-2-fluorophenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (CAS 1142228-23-6)
- 1H-indol-3-yl butyrate (CAS 4346-15-0)
- 2-((4,6-Bis((2-nitrophenyl)amino)-1,3,5-triazin-2-yl)amino)acetic acid (CAS 65052-16-6)
- 5-Bromo-3-methyl-6-(phenylthio)pyrimidine-2,4(1H,3H)-dione (CAS 81077-92-1)
- Semaglutide Impurity 18 (CAS 1671100-14-3)
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