3-Bromo-5-propyl-1,2,4-oxadiazole CAS 1256643-63-6
| CAS No. | 1256643-63-6 |
| Molecular Formula | C5H7BrN2O |
| Molecular Weight | 191.03 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.
3-Bromo-5-propyl-1,2,4-oxadiazole (CAS 1256643-63-6), molecular formula C5H7BrN2O and molecular weight 191.03 g/mol, is a CATO reference standard with documented purity and traceability.
Structurally, 3-Bromo-5-propyl-1,2,4-oxadiazole (C5H7BrN2O) contains an amide group, a hydroxyl group, an ether linkage, bromine substitution. The molecule exhibits a degree of unsaturation (DBE) of 3.0, corresponding to approximately 3 ring(s) or double-bond equivalent(s). With a molecular weight of 191.03 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).
As a certified reference material (CRM), 3-Bromo-5-propyl-1,2,4-oxadiazole 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 | C5H7BrN2O |
| Molecular Weight | 191.03 g/mol |
| Appearance | White to pale yellow crystalline powder. (slight halide-like odor, faint amine-like odor) |
| 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.) | 1990 |
| Halogen Content | Br-containing |
| Nitrogen Atoms | 2 |
Related Bromo Standards
- 2-Bromo-1-(methoxymethyl)-1H-imidazole (CAS 1001755-89-0)
- 4-Bromo-1-(methoxymethyl)-1H-pyrazole (CAS 1071200-42-4)
- 1-(3-Bromo-1,2-oxazol-5-yl)ethan-1-amine (CAS 1187930-15-9)
- 2-(3-Bromo-1H-pyrazol-1-yl)ethanol (CAS 1233525-80-8)
- 5-Bromo-N,N-dimethyl-1H-1,2,4-triazol-3-amine (CAS 1243250-05-6)
- (4-Bromo-1-methyl-1h-pyrazol-5-yl)methanol (CAS 1276056-83-7)
- 2-Bromo-5-(propan-2-yl)-1,3,4-oxadiazole (CAS 1368797-26-5)
- 4-Bromo-3-methoxy-5-methyl-1H-pyrazole (CAS 1373617-66-3)
Recommended Standards
- 1,3-Dichloro-5-(1-fluoroethenyl)benzene (CAS 1261144-43-7)
- 2-(2-Bromoethyl)-5-methyl-1,3,4-oxadiazole (CAS 1267334-20-2)
- 2-(3-Bromoisoxazol-5-yl)ethan-1-amine (CAS 1187932-81-5)
- 7-(3-Aminopropyl)benzo[c][1,2]oxaborol-1(3H)-ol (CAS 1268446-04-3)
- 1-(Acetamidomethyl)cyclopropane-1-carboxylic acid (CAS 205173-55-3)
- 1,2-Diaminobutane (CAS 4426-48-6)
- methyl 2-amino-2-(3,5-dimethylphenyl)acetate hydrochloride (CAS 1803561-42-3)
- 1-(2,3-Dichlorophenyl)ethanamine (hydrochloride) (CAS 39959-66-5)
- Allitinib tosylate, 98%, a novel irreversible inhibitor of EGFR and ErbB2 (CAS 1050500-29-2)
- 6-Chloro-N-(4-methoxybenzyl)-5-nitropyrimidin-4-amine (CAS 651013-61-5)
- 6-Carboxyfluorescein 3,6-Dipivaloyl N-(1-Methylethyl)-2-propanamine (CAS 847569-43-1)
- 5-Bromo-2-methoxy-3-nitrobenzonitrile (CAS 855290-36-7)
- 4,4,5,5-Tetramethyl-2-(4-phenylbicyclo[2.1.1]hexan-1-yl)-1,3,2-dioxaborolane (CAS 2609867-52-7)
- (Des-His1,Glu?)-Glucagon (1-29) amide (human, rat, porcine) (CAS 110084-95-2)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com