4-methyl-1,2,5-oxadiazole-3-carbonyl chloride CAS 15323-68-9
| CAS No. | 15323-68-9 |
| Molecular Formula | C4H3ClN2O2 |
| Molecular Weight | 146.53 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including 4-methyl-1,2,5-oxadiazole-3-carbonyl chloride.
4-methyl-1,2,5-oxadiazole-3-carbonyl chloride (CAS 15323-68-9), molecular formula C4H3ClN2O2 and molecular weight 146.53 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C4H3ClN2O2, 4-methyl-1,2,5-oxadiazole-3-carbonyl chloride contains an amide group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 146.53 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
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 | 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.) | 1961 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
Related methyl Standards
- 5-Methyl-1,2,3-oxadiazole-4-carbonyl chloride (CAS 914637-79-9)
- 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)
Recommended Standards
- 3-Chloropyrazole-4-carboxylic Acid (CAS 134589-59-6)
- 6-Chloro-4-hydroxypyridazin-3(2H)-one (CAS 17276-75-4)
- 4,6-Dihydroxy-5-chloropyrimidine (CAS 1193-56-2)
- 2-Chloro-1-(1,2,5-oxadiazol-3-yl)ethanone (CAS 1803581-79-4)
- n-(3,4-Dimethylbenzyl)butan-1-amine (CAS 1152659-55-6)
- N-methoxy-N-methyl-1H-indole-6-carboxamide (CAS 394653-94-2)
- N,N-dimethyl-2-[(methylamino)methyl]aniline (CAS 1095080-04-8)
- Atractylodinol (CAS 61642-89-5)
- (2R,4R)-1-Cbz-4-methyl-piperidine-2-dicarboxylic acid (CAS 2331211-59-5)
- 2-Ethoxy-5-((4-ethylpiperazin-1-yl)sulfonyl)benzoic acid (CAS 1245644-35-2)
- 7-Bromo-4H-chromen-4-one (CAS 168759-60-2)
- Jasmolin I (CAS 4466-14-2)
- Fluralaner Impurity N6 (CAS 1352242-94-4)
- Semaglutide Impurity 5 (CAS 23406-82-8)
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