4-Bromocyclopent-2-en-1-one CAS 765-56-0
| CAS No. | 765-56-0 |
| Molecular Formula | C5H5BrO |
| Molecular Weight | 161.00 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-Bromocyclopent-2-en-1-one.
CATO supplies 4-Bromocyclopent-2-en-1-one (CAS 765-56-0), a certified reference material (molecular formula C5H5BrO, MW 161.00 g/mol) for analytical method development and quality control.
Structurally, 4-Bromocyclopent-2-en-1-one (C5H5BrO) contains 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 161.00 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.
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 | C5H5BrO |
| Molecular Weight | 161.00 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure |
| Degree of Unsaturation (DBE) | 3.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1957 |
| Halogen Content | Br-containing |
Related Bromocyclopent Standards
- 3-Bromocyclopent-2-en-1-one (CAS 51865-32-8)
- 2-Bromocyclopent-2-en-1-ol (CAS 86488-28-0)
- 3-bromocyclopent-1-ene-1-carbonitrile (CAS 74201-92-6)
- 1-Bromocyclopent-1-ene (CAS 1192-04-7)
- 4-Bromocyclopent-1-ene (CAS 1781-66-4)
- 2-Bromocyclopent-1-ene-1-carbaldehyde (CAS 89466-25-1)
- (2-Bromocyclopent-1-en-1-yl)boronic acid (CAS 612833-43-9)
- Methyl 3-bromocyclopent-1-enecarboxylate (CAS 952606-61-0)
Recommended Standards
- 4-Bromo-2-methylfuran (CAS 24666-43-1)
- 5-bromo-1-methyl-1H-Pyrazole (CAS 361476-01-9)
- 4,4-Dichloro-4-fluorobutan-1-ol (CAS 236736-27-9)
- 5-Bromo-3-methyl-1H-pyrazole (CAS 5744-68-3)
- N-((1-Cyclohexyl-1H-tetrazol-5-yl)methyl)-3-fluorobenzenesulfonamide (CAS 921125-40-8)
- 2,5-Dimethoxybenzyl 3-methylbutanoate (CAS 876665-00-8)
- 2-(2,5-dimethylphenyl)acetaldehyde (CAS 433230-57-0)
- 6-Chloro-2-(2,2,2-trifluoroethoxy)pyridin-3-amine (CAS 1550595-82-8)
- 2-chloro-4-(trifluoromethyl)pyridin-3-amine (CAS 166770-70-3)
- Methyl 2,5-difluoro-3-methylbenzoate (CAS 952479-99-1)
- 3-((3,4-Dichlorobenzyl)thio)-5-((naphthalen-1-yloxy)methyl)-4-phenyl-4H-1,2,4-triazole (CAS 383145-90-2)
- 2-[4-(chloromethyl)-1,3-thiazol-2-yl]-N-phenylacetamide (CAS 926198-05-2)
- 2-Bromo-5-(chloromethyl)-3-(difluoromethyl)pyridine (CAS 1805223-69-1)
- Acetyl Dipeptide-1 (CAS 196604-48-5)
Why CATO?
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