2-Chloro-5-methyloxazole CAS 129053-68-5
| CAS No. | 129053-68-5 |
| Molecular Formula | C4H4ClNO |
| Molecular Weight | 117.53 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
2-Chloro-5-methyloxazole (CAS 129053-68-5), molecular formula C4H4ClNO and molecular weight 117.53 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C4H4ClNO, 2-Chloro-5-methyloxazole 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. 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 | 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.) | 1993 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 1 |
Related Chloro Standards
- 2-chloro-4-methyl-1,3-oxazole (CAS 1060816-10-5)
- 5-Chloro-3-methylisoxazole (CAS 1314938-49-2)
- 2-Chloro-3-oxo-butyronitrile (CAS 60930-76-9)
- 3-Chloro-5-methylisoxazole (CAS 54536-85-5)
- 3-Chloro-1H-pyrazol-4-amine (CAS 103286-54-0)
- 4-Chloro-2-methyl-2H-1,2,3-triazole (CAS 109299-74-3)
- 3-Chloro-5-methyl-1H-1,2,4-triazole (CAS 15285-15-1)
- 2-Chloro-N-cyanoacetimidamide (CAS 53737-87-4)
Recommended Standards
- Zinc Cyanide (CAS 557-21-1)
- 5-Chlorofuran-2-amine (CAS 13725-43-4)
- Triethylsilane-d1 (CAS 1631-33-0)
- 5-(Chloromethyl)oxazole (CAS 172649-57-9)
- 2-((5-Benzyl-4-phenyl-4H-1,2,4-triazol-3-yl)thio)-N-(2-methoxy-5-methylphenyl)acetamide (CAS 720667-78-7)
- 7-Bromo-6,8-dimethylpyrido[2,3-b]pyrazine (CAS 116056-18-9)
- ([1,1′-Biphenyl]-2-olato)dichloro[(1,2,3,4,5-η)-1,2,3,4,5-pentamethyl-2,4-cyclopentadien-1-yl]titanium (CAS 918151-45-8)
- 4-(Cyclopentylamino)benzonitrile (CAS 1019512-92-5)
- 3-Chloro-4-fluoro-2-nitroaniline (CAS 1059081-23-0)
- Methyl 3-(((dimethylamino)methylene)amino)pyrazine-2-carboxylate (CAS 134540-17-3)
- 6-Methyl-2,3,4,9-tetrahydro-1H-pyrido[3,4-b]indole (CAS 3464-80-0)
- 1-(Bromomethyl)-4-(4-methylphenoxy)benzene (CAS 78805-82-0)
- 2-Chloro-1-(6-(2,5-dimethyl-1H-pyrrol-1-yl)pyridin-3-yl)ethanone (CAS 228710-83-6)
- Semaglutide impurity 88 (CAS CATO-C4X-222688)
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