2-Bromobut-2-enoic acid CAS 5405-34-5
| CAS No. | 5405-34-5 |
| Molecular Formula | C4H5BrO2 |
| Molecular Weight | 164.99 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies 2-Bromobut-2-enoic acid (CAS 5405-34-5), a certified reference material (molecular formula C4H5BrO2, MW 164.99 g/mol) for analytical method development and quality control.
Owing to a carboxylic acid group, a hydroxyl group, an ether linkage, bromine substitution, 2-Bromobut-2-enoic acid is typically white to off-white crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 164.99 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.
As a certified reference material (CRM), 2-Bromobut-2-enoic acid 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 | C4H5BrO2 |
| Molecular Weight | 164.99 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 | Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 2.0 |
| CAS Registry Year (est.) | 1958 |
| Halogen Content | Br-containing |
Related Bromobut Standards
- 4-Bromobut-2-enoic Acid (CAS 20629-35-0)
- 4-Bromobut-2-enamide (CAS 118941-93-8)
- Methyl 4-bromobut-2-ynoate (CAS 40995-01-5)
- 4-bromobut-3-en-1-ol (CAS 306749-29-1)
- Methyl 2-bromobut-2-enoate (mixture of trans and ciS) (CAS 22966-48-9)
- 3-Bromobut-3-en-1-amine (CAS 328058-75-9)
- 4-Bromobut-2-yn-1-ol (CAS 13280-08-5)
- (E)-3-Bromobut-2-enal (CAS 33603-83-7)
Recommended Standards
- 2-Bromo-3-oxobutanal (CAS 87005-15-0)
- 2-Bromocyclopropane-1-carboxylic acid (CAS 89123-64-8)
- 1-bromocyclopropanecarboxylic acid (CAS 89544-84-3)
- 4-(Bromomethyl)oxetan-2-one (CAS 33282-42-7)
- 3-(2-(Dimethylamino)ethyl)-1-methyl-1,2,3,4-tetrahydropyrimidin-5-amine (CAS 1342141-32-5)
- 4-methyl-7-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-2H-pyrido[3,2-b][1,4]oxazin-3(4H)-one (CAS 1857348-93-6)
- 205319-06-8 [Oxydi(2,1-phenylene)]bis(diphenylphosphane)--dichloropalladium (1/1) DTXSID10463965 (CAS 205319-06-8)
- 3'-Amino-5-hydroxy-[1,1'-biphenyl]-3-carbonitrile (CAS 1261900-78-0)
- Tert-butyl 2-amino-4-(trifluoromethyl)benzoate (CAS 1485729-20-1)
- 4-(2-Methyl-1H-indol-3-yl)-1,3-thiazol-2-amine (CAS 50825-19-9)
- 6-Hydroxy-2,3-dimethylbenzaldehyde (CAS 42373-90-0)
- 4-Chloro-2,5-bis(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzonitrile (CAS 863868-45-5)
- 2-Bromo-4-ethoxy-1-(trifluoromethoxy)benzene (CAS 1049730-92-8)
- Insulin Degludec Impurity 7 (CAS CATO-C4X-21577)
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