5-(Chloromethyl)-1,2-oxazole CAS 57777-33-0
| CAS No. | 57777-33-0 |
| Molecular Formula | C4H4ClNO |
| Molecular Weight | 117.53 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Based on its molecular formula C4H4ClNO, 5-(Chloromethyl)-1,2-oxazole contains an amide group, a hydroxyl group, an ether linkage, chlorine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 117.53 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.
5-(Chloromethyl)-1,2-oxazole (CAS 57777-33-0), molecular formula C4H4ClNO and molecular weight 117.53 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 | C4H4ClNO |
| Molecular Weight | 117.53 g/mol |
| 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) | 3.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1973 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 1 |
Related Chloromethyl Standards
- 5-(Chloromethyl)oxazole (CAS 172649-57-9)
- 2-(Chloromethyl)oxazole (CAS 185246-17-7)
- 3-(Chloromethyl)isoxazole (CAS 57684-71-6)
- 4-(Chloromethyl)isoxazole (CAS 98020-14-5)
- 4-(chloromethyl)oxazole (CAS 767628-89-7)
- 1-Chloromethyl-1H-1,2,4-triazole (CAS 84387-62-2)
- 2-(chloromethyl)-2H-1,2,3-triazole (CAS 80199-90-2)
- 5-(Chloromethyl)-1H-1,2,3-triazole (CAS 854937-88-5)
Recommended Standards
- 3-Chloro-1H-pyrazol-4-amine (CAS 103286-54-0)
- 2-Methyl-4-nitro-2H-1,2,3-triazole (CAS 107945-73-3)
- 3-Chloro-5-methylisoxazole (CAS 54536-85-5)
- 4-Chloro-2-methyl-2H-1,2,3-triazole (CAS 109299-74-3)
- 3-((tert-Butyldiphenylsilyl)oxy)cyclobutanone (CAS 1187595-68-1)
- 4-methoxy-2-methyl(1,3-dioxolan-2-ylmethyl)benzene (CAS 898785-34-7)
- 1-(3-(Aminomethyl)pyrrolidin-1-yl)-2-(4-chlorophenyl)ethan-1-one (CAS 1832011-58-1)
- n-(3-Cyanobenzyl)-4-methylthiazole-5-carboxamide (CAS 1223525-41-4)
- 1,3-Dimethyl-5-(morpholin-4-yl)-1h-pyrazole-4-carbaldehyde (CAS 26990-69-2)
- Ethyl 6,8-dichloro-2-(pyridin-3-yl)quinoline-4-carboxylate (CAS 6332-48-5)
- Ethyl 3,6-dibromo-2-fluorophenylacetate (CAS 1806351-20-1)
- 6-Amino-2-chloro-5-(difluoromethyl)nicotinic acid (CAS 1805061-87-3)
- Methyl 3-nitro-4-{4-[(3-oxo-3,4-dihydro-2H-1,4-benzoxazin-6-yl)carbamoyl]piperazin-1-yl}benzoate (CAS 866137-44-2)
- Semaglutide impurity 269 (CAS CATO-C4X-2226269)
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