2-Bromo-3-methylbut-1-ene CAS 31844-96-9
| CAS No. | 31844-96-9 |
| Molecular Formula | C5H9Br |
| Molecular Weight | 149.03 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of 2-Bromo-3-methylbut-1-ene is closely related to bromine substitution in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
2-Bromo-3-methylbut-1-ene (CAS 31844-96-9), molecular formula C5H9Br and molecular weight 149.03 g/mol, is a CATO reference standard with documented purity and traceability.
The molecular framework of 2-Bromo-3-methylbut-1-ene (C5H9Br) is characterized by bromine substitution. In reversed-phase chromatography, its retention is governed primarily by the polarity and ionization state of its functional groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
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 | C5H9Br |
| Molecular Weight | 149.03 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) | 1.0 |
| CAS Registry Year (est.) | 1966 |
| Halogen Content | Br-containing |
Related Bromo Standards
- 5-bromo-1-pentene (CAS 1119-51-3)
- 1-Bromo-1-ethylcyclopropane (CAS 80204-21-3)
- 1-Bromo-1-methylcyclobutane (CAS 80204-24-6)
- 2-bromo-1,1-dimethylcyclopropane (CAS 3815-09-6)
- 4-Bromo-2-methylbut-1-ene (CAS 20038-12-4)
- 4-Bromo-3-methylbut-1-ene (CAS 31950-55-7)
- 2-Bromo-3-methyl-2-butene 2-bromo-3-methylbut-2-ene 3017-70-7 (CAS 3017-70-7)
- 1-Bromo-2-pentene, predominantly trans 7348-71-2 (CAS 7348-71-2)
Recommended Standards
- 2-Bromoethylcyclopropane (CAS 36982-56-6)
- 2-(Bromomethyl)-1-butene (CAS 59032-45-0)
- 1-bromopent-2-ene (CAS 20599-27-3)
- 4-Bromopent-1-ene (CAS 31950-56-8)
- 3-(tert-Butyl)-1H-pyrazole-4-carboxylic acid (CAS 1152540-42-5)
- Ethyl 3-(2-((tert-butoxycarbonyl)amino)ethyl)-1,2,4-oxadiazole-5-carboxylate (CAS 1053656-31-7)
- 3-[(cyclopropylcarbamoyl)amino]benzoic acid (CAS 1146299-29-7)
- Lansoprazole impurity 71 (CAS 2138848-91-4)
- Methyl 2-fluoro-5-(2-fluorophenyl)benzoate (CAS 1820620-43-6)
- 2-Hydrazinyl-4,5-dimethylthiazole trihydrochloride (CAS 1263377-62-3)
- {2-[(2-chloro-4-fluorophenyl)methoxy]phenyl}boranediol (CAS 1311184-95-8)
- Benzyl 1,8-diazaspiro[5.5]Undecane-8-carboxylate hydrochloride (CAS 1439896-71-5)
- Methyl 3'-bromo-[1,1'-biphenyl]-4-carboxylate (CAS 89900-91-4)
- Semaglutide impurity 57 (CAS 2773558-06-6)
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