(E)-2,3-Dibromo-4-oxobut-2-enoic acid CAS 90994-06-2
| CAS No. | 90994-06-2 |
| Molecular Formula | C4H2Br2O3 |
| Molecular Weight | 257.86 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.
CATO supplies (E)-2,3-Dibromo-4-oxobut-2-enoic acid (CAS 90994-06-2), a certified reference material (molecular formula C4H2Br2O3, MW 257.86 g/mol) for analytical method development and quality control.
(E)-2,3-Dibromo-4-oxobut-2-enoic acid (C4H2Br2O3) contains a carboxylic acid group, a hydroxyl group, an ether linkage, bromine substitution. It is notably hygroscopic, halogen substitution raises its density and boiling point, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
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 | C4H2Br2O3 |
| Molecular Weight | 257.86 g/mol |
| Purity | 97%+ |
| Storage | Store in a cool place (≤25°C), keep sealed and dry, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO, water |
| Stability | May oxidize slowly on prolonged air exposure; Hygroscopic; reseal immediately after opening; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 3.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1982 |
| Halogen Content | Br-containing |
Related E Standards
- 2,3-Dibromo-4-oxobut-2-enoic acid (CAS 21577-50-4)
- 3,4-Dibromo-5-hydroxyfuran-2(5H)-one (CAS 766-38-1)
- 2,5-Dibromo-4-fluoro-1-methyl-1H-imidazole (CAS 1824064-07-4)
- 1,5-Dibromo-2,4-pentanedione (CAS 68864-57-3)
- 2,2-Dibromo-1-methylcyclopropane-1-carboxylic acid (CAS 5365-21-9)
- 1,5-Dibromo-3,3-dimethylpentane (CAS 37746-17-1)
- 1,2-Dibromo-1-chloro-2,2-difluoroethane (CAS 421-36-3)
- 1,2-Dibromo-3-thiocyanatoprop-1-ene (CAS 102367-28-2)
Recommended Standards
- 2-Chloro-4-pyridylzinc bromide (CAS 1227940-97-7)
- 2-Chloro-3-pyridylzinc bromide 0.5 M in Tetrahydrofuran (CAS 1227833-83-1)
- 4,4'-Oxybis(1,4-phenylene)diboronic acid (CAS 19014-29-0)
- 3,4-Dibromodihydrofuran-2,5-dione (CAS 45669-18-9)
- 5-Bromo-2-((3-fluorobenzyl)oxy)pyrimidine (CAS 1635413-27-2)
- 4-((1E,3E)-4-Phenylbuta-1,3-dien-1-yl)phenol (CAS 1206103-27-6)
- 2'-(Benzyloxy)[1,1'-biphenyl]-4-carbonitrile (CAS 893736-95-3)
- 189109-45-3 Byzantionoside B C19H32O7 W2295 (CAS 189109-45-3)
- N-(3-methoxybenzyl)cycloheptanamine hydrobromide (CAS 1609407-63-7)
- (R)-α-[(Acetylthio)methyl]benzenepropanoic Acid (CAS 116111-79-6)
- 3-Cyclopropoxy-5-methyl-2-(methylthio)pyridine (CAS 1243353-64-1)
- 5-Bromo-1,3-difluoro-2-(trifluoromethoxy)benzene (CAS 115467-07-7)
- cis-3-Fluorocyclobutanamine (CAS 1260670-54-9)
- Des-Pro-Pro-Tirzepatide (CAS CATO-CPTD788696)
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