5-(5-Methylbenzo[d]oxazol-2-yl)-1,3,4-oxadiazol-2(3H)-one CAS 78620-20-9
| CAS No. | 78620-20-9 |
| Molecular Formula | C10H7N3O3 |
| Molecular Weight | 217.18 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
5-(5-Methylbenzo[d]oxazol-2-yl)-1,3,4-oxadiazol-2(3H)-one (CAS 78620-20-9), molecular formula C10H7N3O3 and molecular weight 217.18 g/mol, is a CATO reference standard with documented purity and traceability.
Structurally, 5-(5-Methylbenzo[d]oxazol-2-yl)-1,3,4-oxadiazol-2(3H)-one (C10H7N3O3) contains an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 9.0, corresponding to approximately 9 ring(s) or double-bond equivalent(s). With a molecular weight of 217.18 g/mol, it falls into the medium-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).
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
As a certified reference material (CRM), 5-(5-Methylbenzo[d]oxazol-2-yl)-1,3,4-oxadiazol-2(3H)-one 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.
Physical & Chemical Properties
| Molecular Formula | C10H7N3O3 |
| Molecular Weight | 217.18 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (faint amine-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 9.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1979 |
| Nitrogen Atoms | 3 |
Related Methylbenzo Standards
- 5-(4-Methylbenzo[d]oxazol-2-yl)-1,3,4-oxadiazol-2(3H)-one (CAS 78620-19-6)
- 5-(6-Methylbenzo[d]oxazol-2-yl)-1,3,4-oxadiazol-2(3H)-one (CAS 78620-17-4)
- 2-Methylbenzo[d]imidazo[2,1-b]thiazole-3-carbaldehyde (CAS 876717-81-6)
- 5-(3-Methylbenzo[b]thiophen-2-yl)-1H-tetrazole (CAS 951625-85-7)
- Ethyl 2-(5-methylbenzo[d]oxazol-2-yl)acetate (CAS 138399-44-7)
- 5-(3-Methylbenzo[b]thiophen-2-yl)-1H-pyrazole (CAS 577784-90-8)
- Ethyl 4-methylbenzo[b]thiophene-2-carboxylate (CAS 1260109-75-8)
- 1-(4-Methylbenzo[d]thiazol-2-yl)azetidin-3-ol (CAS 1421509-29-6)
Recommended Standards
- 5-(4-Nitrophenyl)pyrazin-2(1H)-one (CAS 89541-65-1)
- 5-(4-Nitrophenyl)-1,2,4-triazin-3-amine (CAS 886497-42-3)
- 5-(Benzo[d]oxazol-2-yl)-3-methyl-1,3,4-oxadiazol-2(3H)-one (CAS 87802-14-0)
- 5'-Nitro-[2,3'-bipyridin]-6'(1'H)-one (CAS 62749-36-4)
- S-Acetylthioacetic Acid (CAS 1190-93-8)
- 10-(Tert-butyl)-7-oxa-15b-aza-11b-borabenzo[a]naphtho[3,2,1-fg]aceanthrylene (CAS 2484846-47-9)
- 3-Bromo-5-fluoro-N-isopropylbenzamide (CAS 1181538-97-5)
- 2-Fluoro-1,5-dimethyl-3-nitrobenzene (CAS 320-74-1)
- (2R,3R)-2-(4-Hydroxyphenyl)-7-methoxy-8-methylchroman-3-ol (CAS 497142-88-8)
- 1-(sec-Butyl)-1-(1-ethyl-4,5-dihydro-1H-imidazol-2-yl)guanidine (CAS 724412-98-0)
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- 5-(Hydroxymethyl)benzene-1,2,3-triol (CAS 68325-64-4)
- Exenatide (CAS 141758-74-9（free base）)
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