5-Methyl-1,2,3-oxadiazole-4-carbonyl chloride CAS 914637-79-9
| CAS No. | 914637-79-9 |
| Molecular Formula | C4H3ClN2O2 |
| Molecular Weight | 146.53 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), 5-Methyl-1,2,3-oxadiazole-4-carbonyl chloride meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
5-Methyl-1,2,3-oxadiazole-4-carbonyl chloride (CAS 914637-79-9), molecular formula C4H3ClN2O2 and molecular weight 146.53 g/mol, is a CATO reference standard with documented purity and traceability.
Structurally, 5-Methyl-1,2,3-oxadiazole-4-carbonyl chloride (C4H3ClN2O2) contains an amide group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution. The molecule exhibits a degree of unsaturation (DBE) of 4.0, corresponding to approximately 4 ring(s) or double-bond equivalent(s). With a molecular weight of 146.53 g/mol, it falls into the low-molecular-weight range. 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 | C4H3ClN2O2 |
| Molecular Weight | 146.53 g/mol |
| 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 DMSO, DMF, methanol |
| 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 |
| CAS Registry Year (est.) | 1987 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
Related Methyl Standards
- 4-methyl-1,2,5-oxadiazole-3-carbonyl chloride (CAS 15323-68-9)
- 3-Phenyl-1,2,5-oxadiazole (CAS 10349-06-1)
- 5-phenyl-1,2,4-oxadiazole (CAS 16494-52-3)
- 2-Phenyl-1,3,4-oxadiazole (CAS 825-56-9)
- 3-phenyl-1,2,4-oxadiazole (CAS 5157-62-0)
- 4-ethyl-1,2,5-oxadiazole-3-carboxylic acid (CAS 1083424-17-2)
- 3-ethyl-1,2,4-oxadiazole-5-carboxylic acid (CAS 944906-35-8)
- 5-propyl-1,3,4-oxadiazole-2-thiol (CAS 31130-16-2)
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