3-Butynyl Bromide 38771-21-0 4-Bromo-1-butyne B3242 CAS 38771-21-0
| CAS No. | 38771-21-0 |
| Molecular Formula | C4H5Br |
| Molecular Weight | 132.99 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.
3-Butynyl Bromide 38771-21-0 4-Bromo-1-butyne B3242 (CAS 38771-21-0), molecular formula C4H5Br and molecular weight 132.99 g/mol, is a CATO reference standard with documented purity and traceability.
3-Butynyl Bromide 38771-21-0 4-Bromo-1-butyne B3242 (C4H5Br) contains bromine substitution. Halogen substitution raises its density and boiling point; these physicochemical properties determine the optimal preparation and storage of its standard solutions. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
As a certified reference material (CRM), 3-Butynyl Bromide 38771-21-0 4-Bromo-1-butyne B3242 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 | C4H5Br |
| Molecular Weight | 132.99 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.) | 1968 |
| Halogen Content | Br-containing |
Related Butynyl Standards
Recommended Standards
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