1-bromo-3-methylene-cyclobutane CAS 4934-60-5
| CAS No. | 4934-60-5 |
| Molecular Formula | C5H7Br |
| Molecular Weight | 147.01 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
1-bromo-3-methylene-cyclobutane (CAS 4934-60-5), molecular formula C5H7Br and molecular weight 147.01 g/mol, is a CATO reference standard with documented purity and traceability.
Structurally, 1-bromo-3-methylene-cyclobutane (C5H7Br) contains bromine substitution. The molecule exhibits a degree of unsaturation (DBE) of 2.0, corresponding to approximately 2 ring(s) or double-bond equivalent(s). With a molecular weight of 147.01 g/mol, it falls into the low-molecular-weight range. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
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 | C5H7Br |
| Molecular Weight | 147.01 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO |
| Stability | Stable under recommended storage conditions |
| Degree of Unsaturation (DBE) | 2.0 |
| CAS Registry Year (est.) | 1958 |
| Halogen Content | Br-containing |
Related bromo Standards
- 1-bromo-2-pentyne (CAS 16400-32-1)
- 3-Bromo-3-methylbut-1-yne (CAS 6214-31-9)
- 5-Bromo-1-pentyne (CAS 28077-72-7)
- 5-Bromo-1H-pyrazole (CAS 1174132-74-1)
- 2-Bromo-1H-imidazole (CAS 16681-56-4)
- 3-Bromo-1,2,4-triazol-4-ide (CAS 57704-26-4)
- 1-Bromo-2-chloroethane-d4 (CAS 1219795-52-4)
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Recommended Standards
- 1-(Bromomethyl)-2-methylidenecyclopropane (CAS 69513-34-4)
- 1-bromospiro[2.2]pentane (CAS 75522-03-1)
- [(E)-2-bromoethenyl]cyclopropane (CAS 220132-80-9)
- 5-Bromopent-2-yne (CAS 18719-27-2)
- 2,2,6,6-Tetramethylpiperidine-4-carboxamide (CAS 325691-90-5)
- 1-(3-Chloro-5-fluorophenyl)cyclopropane-1-carbonitrile (CAS 1314759-91-5)
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- 5-(4-Formyl-3,5-dimethoxyphenoxy)pentanoic acid (CAS 115109-59-6)
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