2-Chloro-5-methyl-1,3,4-oxadiazole CAS 98321-75-6
| CAS No. | 98321-75-6 |
| Molecular Formula | C3H3ClN2O |
| Molecular Weight | 118.52 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
2-Chloro-5-methyl-1,3,4-oxadiazole (CAS 98321-75-6), molecular formula C3H3ClN2O and molecular weight 118.52 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C3H3ClN2O, 2-Chloro-5-methyl-1,3,4-oxadiazole 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 118.52 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.
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 | C3H3ClN2O |
| Molecular Weight | 118.52 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, 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 |
| Degree of Unsaturation (DBE) | 3.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1985 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
Related Chloro Standards
- 3-Chloro-5-methyl-1,2,4-oxadiazole (CAS 1359822-66-4)
- 3-chloro-2,5-dihydrofuran-2-one (CAS 31004-27-0)
- 5-Chloro-4H-1,2,4-triazol-3-amine (CAS 130631-49-1)
- 5-Chloro-1-methyl-1h-1,2,3,4-tetrazole (CAS 67648-50-4)
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- 2-Chloro-3-methylcyclopropane-1-carbaldehyde (CAS 139387-00-1)
- 3-Chloro-2-methylbut-2-enal (CAS 1679-40-9)
- 1-Chloro-4-methoxybut-2-yne (CAS 693-27-6)
Recommended Standards
- 2-(Chloromethyl)-1,3,4-oxadiazole (CAS 73315-63-6)
- 4-Chloroisoxazol-3-amine (CAS 166817-65-8)
- 5-(Chloromethyl)-1,2,4-oxadiazole (CAS 69146-79-8)
- 3-(chloromethyl)-1,2,5-oxadiazole (CAS 1487782-22-8)
- Potassium 2-phenyl-1H-benzo[d]imidazole-5-sulfonate (CAS 158099-19-5)
- 4-[(5-Chloro-2,3-dihydro-2,2-dimethyl-7-benzofuranyl)methoxy]-2,3-dimethylbenzenepropanoic Acid (CAS 1234844-11-1)
- 7-Bromoquinolin-6-amine (CAS 50358-46-8)
- N'-(3-chloro-5-(trifluoromethyl)pyridin-2-yl)-N'-methylnaphthalene-2-sulfonohydrazide (CAS 338748-70-2)
- 2-(4-Benzylpiperazin-1-yl)-N-(4-bromophenyl)acetamide (CAS 303091-48-7)
- 9-(3-(4,4,5,5-Tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)carbazole (CAS 870119-58-7)
- Roxadustat Impurity 18 (CAS 2376195-48-9)
- Sodium (S)-2-((2R,3R,4S,5R,6S)-2-hydroxy-6-((S)-1-((2S,5R,7S,8R,9S)-2-((2S,2'R,3'S,4'R,5R,5'R)-5'-((2S,3S,4S,5R,6S)-6-hydroxy-4-methoxy-3,5,6-trimethyltetrahydro-2H-pyran-2-yl)-4'-methoxy-2,3'-dimethyloctahydro-[2,2'-bifuran]-5-yl)-9-methoxy-2,8-dimethyl-1,6-dioxaspiro[4.5]decan-7-yl)ethyl)-4-methoxy-3,5-dimethyltetrahydro-2H-pyran-2-yl)propanoate (CAS 58845-80-0)
- 2,2-Bis-(4-hydroxyphenyl)hexafluoropropane-d4 (CAS CATO-CCHM703781)
- C-Peptide (human) (CAS 33017-11-7)
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