5-(3-Thienyl)-1H-indole-2,3-dione CAS 132898-98-7
| CAS No. | 132898-98-7 |
| Molecular Formula | C12H7NO2S |
| Molecular Weight | 229.25 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
5-(3-Thienyl)-1H-indole-2,3-dione (CAS 132898-98-7) is a high-purity analytical reference standard with the molecular formula C12H7NO2S and a molecular weight of 229.25 g/mol.
Based on its molecular formula C12H7NO2S, 5-(3-Thienyl)-1H-indole-2,3-dione contains a nitrogen-containing heterocyclic scaffold, an amide group, a sulfone group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 229.25 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).
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 | C12H7NO2S |
| Molecular Weight | 229.25 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1994 |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Related Thienyl Standards
- 5-(2-Thienyl)Isatin (CAS 132898-97-6)
- 2-(2-Thienyl)-4H-3,1-benzoxazin-4-one (CAS 26060-06-0)
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- 2-(5-Acetyl-2-thienyl)benzaldehyde (CAS 893741-87-2)
- 5-[2-(2-Thienyl)ethyl]-1,4,5,6-tetrahydro-1,3,5-triazine-2-thiol (CAS 879617-91-1)
- 3-(5-Acetyl-2-thienyl)benzonitrile (CAS 893741-59-8)
- 5-(2-Thienyl)-1H-indole-3-carbaldehyde (CAS 893734-01-5)
Recommended Standards
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- Peptide Impurity 81 TFA (CAS CATO-CPTD788581)
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