(E)-2,3-Dibromo-2-butenedioic acid CAS 608-38-8
| CAS No. | 608-38-8 |
| Molecular Formula | C4H2Br2O4 |
| Molecular Weight | 273.86 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies (E)-2,3-Dibromo-2-butenedioic acid (CAS 608-38-8), a certified reference material (molecular formula C4H2Br2O4, MW 273.86 g/mol) for analytical method development and quality control.
Structurally, (E)-2,3-Dibromo-2-butenedioic acid (C4H2Br2O4) contains a carbohydrate-derived structure, bromine substitution. The molecule exhibits a degree of unsaturation (DBE) of 3.0, corresponding to approximately 3 ring(s) or double-bond equivalent(s). With a molecular weight of 273.86 g/mol, it falls into the medium-molecular-weight range. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.
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 | C4H2Br2O4 |
| Molecular Weight | 273.86 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.) | 1957 |
| Halogen Content | Br-containing |
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Recommended Standards
- 2,3-Dibromobut-2-enedioic acid (CAS 149230-81-9)
- 5-Bromo-4-iodo-1H-1,2,3-triazole (CAS 2566600-08-4)
- Terbium vanadium oxide, 99.8% (REO) (CAS 13566-09-1)
- 608-37-7 2-Butenedioic acid, 2,3-dibromo-, (Z)- (9CI) 2-Butenedioic acid, 2,3-dibromo-, (2Z)- 2,3-Dibromomaleic acid 2-Butenedioic acid, 2,3-dibromo-, (Z)- Dibromomaleic acid EINECS 210-162-6 Maleic acid, dibromo- NSC 263482 (CAS 608-37-7)
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- Mianserin impurity 20 (CAS CATO-C4X-136920)
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Why CATO?
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