1H,4H,6H-5Λ-thieno[3,4-c]pyrazole-5,5-dione CAS 139124-98-4
| CAS No. | 139124-98-4 |
| Molecular Formula | C5H6N2O2S |
| Molecular Weight | 158.18 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), 1H,4H,6H-5Λ-thieno[3,4-c]pyrazole-5,5-dione meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
CATO supplies 1H,4H,6H-5Λ-thieno[3,4-c]pyrazole-5,5-dione (CAS 139124-98-4), a certified reference material (molecular formula C5H6N2O2S, MW 158.18 g/mol) for analytical method development and quality control.
1H,4H,6H-5Λ-thieno[3,4-c]pyrazole-5,5-dione (C5H6N2O2S) contains an amide group, a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage. It is notably hygroscopic, 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).
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C5H6N2O2S |
| Molecular Weight | 158.18 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1996 |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |
Recommended Standards
- 2,2-Dihydroxy-1-(thiophen-2-yl)ethan-1-one (CAS 138380-43-5)
- 2-(Methylamino)-1,3-thiazole-5-carboxylic acid (CAS 1393525-02-4)
- Ethyl 1,3,4-Thiadiazole-2-carboxylate (CAS 1378819-08-9)
- 5-Methyl-2-nitrothiophen-3-amine (CAS 1404364-31-3)
- 1-(Morpholinomethyl)-3-phenyl-1,3-dihydro-2H-benzo[d]imidazole-2-thione (CAS 381193-41-5)
- Tert-butyl 5-bromo-6-(trifluoromethoxy)indole-1-carboxylate (CAS 2227479-96-9)
- 2-Methyl-3,4,6-triphenylbenzofuran (CAS 197359-75-4)
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- 5-(chloromethyl)-2,3-dihydro-1,3,4-thiadiazol-2-one (CAS 84352-71-6)
- 3-((3-Methylbenzyl)thio)-1H-1,2,4-triazole (CAS 307545-27-3)
- 4,4,5,5-Tetramethyl-2-(2-phenylpropyl)-1,3,2-dioxaborolane (CAS 280559-30-0)
- Tirzepatide Impurity 57 (CAS CATO-C4X-324057)
Why CATO?
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