1-Bromo-1,3-Butadiene CAS 21890-35-7
| CAS No. | 21890-35-7 |
| Molecular Formula | C4H5Br |
| Molecular Weight | 132.99 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 1-Bromo-1,3-Butadiene.
1-Bromo-1,3-Butadiene (CAS 21890-35-7), molecular formula C4H5Br and molecular weight 132.99 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to bromine substitution, 1-Bromo-1,3-Butadiene is typically white to off-white liquid. Its solid-state physicochemical attributes — including a molecular weight of 132.99 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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.
CATO manufactures 1-Bromo-1,3-Butadiene under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
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.) | 1963 |
| Halogen Content | Br-containing |
Related Bromo Standards
- 3-Bromo-1-butyne (CAS 18668-72-9)
- (Z)-1-Bromo-1,3-Butadiene (CAS 56318-77-5)
- 1-Bromo-2-butyne (CAS 3355-28-0)
- 2-Bromo-2-butene, cis and trans mixture (CAS 13294-71-8)
- 3-Bromo-2-methylpropene (CAS 1458-98-6)
- 1-Bromo-1-methylcyclopropane (CAS 50915-27-0)
- 1-Bromo-2-Buten (CAS 29576-14-5)
- 1-Bromo-2-methylcyclopropane (CAS 52914-88-2)
Recommended Standards
- 3-Butynyl Bromide 38771-21-0 4-Bromo-1-butyne B3242 (CAS 38771-21-0)
- (E)-1-Bromobuta-1,3-diene (CAS 89567-73-7)
- 5-Fluorouracil-13C,15N2 (CAS 1189423-58-2)
- Isofluorane Impurity N1 (CAS 463-98-9)
- (1S,4s)-4-(methylsulfonyl)cyclohexan-1-amine hydrochloride (CAS 2230789-74-7)
- 3-Iodo-5-nitro-1H-pyrazolo[3,4-b]pyridine (CAS 1186609-70-0)
- Methyl 2-(6-hydroxy-2,3-dihydrobenzo[b]thiophen-3-yl)acetate (CAS 1380792-71-1)
- 4-Morpholinecarboxylic Acid Isopropyl Ester (CAS 6298-77-7)
- 1-Bromo-4-methoxyisoquinoline (CAS 1421517-83-0)
- 1-(Benzenesulfonyl)-5-bromo-4-fluoro-1H-pyrrolo[2,3-b]pyridine (CAS 1172067-98-9)
- 2-((4-Butyl-8-methyl-2-oxo-2h-chromen-7-yl)oxy)propanoic acid (CAS 438028-14-9)
- 3-Morpholinocyclobutanol (CAS 1564732-40-6)
- Methyl 2-((4-hydroxybutyl)amino)acetate (CAS 391642-52-7)
- Tirzepatide Impurity 57 (CAS CATO-C4X-324057)
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