(E)-[(5,7-Dibromo-1-benzofuran-2-yl)(phenyl)methylidene]amino thiophene-2-carboxylate CAS 477858-33-6
| CAS No. | 477858-33-6 |
| Molecular Formula | C20H11Br2NO3S |
| Molecular Weight | 505.18 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
(E)-[(5,7-Dibromo-1-benzofuran-2-yl)(phenyl)methylidene]amino thiophene-2-carboxylate (CAS 477858-33-6), molecular formula C20H11Br2NO3S and molecular weight 505.18 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to a steroid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage, bromine substitution, (E)-[(5,7-Dibromo-1-benzofuran-2-yl)(phenyl)methylidene]amino thiophene-2-carboxylate is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 505.18 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.
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 | C20H11Br2NO3S |
| Molecular Weight | 505.18 g/mol |
| Purity | 97%+ |
| Storage | Store at room temperature, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 15.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2025 |
| Halogen Content | Br-containing |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Related E Standards
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Recommended Standards
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- 1S,3R,αR-Deltamethrin (CAS 106454-65-3)
- Erythromycin (CAS 114-07-8)
- Ethyl 4'-fluoro-[1,1'-biphenyl]-4-carboxylate (CAS 10540-36-0)
- 3-Methyl-10-ethyl-Deazaflavin (CAS 59997-14-7)
- (2R,3S,4S,5R)-2-(Acetoxymethyl)-2-azido-5-(2,4-dioxo-3,4-dihydropyrimidin-1(2H)-yl)tetrahydrofuran-3,4-diyl diacetate (CAS 2459945-87-8)
- 1-(3,4-Dihydroxy-4,5-dihydrofuran-2-yl)ethanone (CAS 19872-46-9)
- Methyl 2-((1H-benzo[d]imidazol-2-yl)methyl)benzoate (CAS 62513-27-3)
- N-Butylsulfamide (CAS 42731-63-5)
- Methyl 2-(trifluoromethyl)-1H-indole-3-carboxylate (CAS 1008365-18-1)
- 4-((Trimethylsilyl)oxy)tetrahydro-2h-thiopyran-4-carbonitrile (CAS 1248292-19-4)
- Semaglutide impurity 94 (CAS CATO-C4X-222694)
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