2,5-Dichloro-3,4-dinitrothiophene CAS 51584-21-5
| CAS No. | 51584-21-5 |
| Molecular Formula | C4Cl2N2O4S |
| Molecular Weight | 243.02 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Based on its molecular formula C4Cl2N2O4S, 2,5-Dichloro-3,4-dinitrothiophene contains a carbohydrate-derived structure, an amide group, a sulfone group, chlorine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 243.02 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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).
2,5-Dichloro-3,4-dinitrothiophene (CAS 51584-21-5) is a high-purity analytical reference standard with the molecular formula C4Cl2N2O4S and a molecular weight of 243.02 g/mol.
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 | C4Cl2N2O4S |
| Molecular Weight | 243.02 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, 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; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1971 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |
Related Dichloro Standards
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- Methyl 3-(piperidin-1-yl)butanoate (CAS 122958-11-6)
- tert-Butyl 3-chloro-4-oxopyrrolidine-1-carboxylate (CAS 2089319-18-4)
- 1-(4-(Tert-butyl)benzyl)-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazole (CAS 1562304-58-8)
- 2-(2-Oxoazepan-1-yl)isonicotinic acid (CAS 1782638-52-1)
- 5-(bromomethyl)-2,2-difluoro-2H-1,3-benzodioxole (CAS 68119-30-2)
- Semaglutide impurity 23 (CAS CATO-C4X-222623)
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