4-Oxo-4,5-dihydro-1,2,5-thiadiazole-3-carboxamide CAS 88947-67-5
| CAS No. | 88947-67-5 |
| Molecular Formula | C3H3N3O2S |
| Molecular Weight | 145.14 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
4-Oxo-4,5-dihydro-1,2,5-thiadiazole-3-carboxamide (CAS 88947-67-5), molecular formula C3H3N3O2S and molecular weight 145.14 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C3H3N3O2S, 4-Oxo-4,5-dihydro-1,2,5-thiadiazole-3-carboxamide contains an amide group, a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 145.14 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).
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
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 | C3H3N3O2S |
| Molecular Weight | 145.14 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.) | 1982 |
| Nitrogen Atoms | 3 |
| Sulfur Atoms | 1 |
Related Oxo Standards
- 2,3-Dihydro-3-oxo-5-isothiazolecarboxylic Acid (CAS 1257444-26-0)
- 2-oxo-2,3-dihydro-1,3-thiazole-5-carboxylic acid (CAS 857982-30-0)
- 5-Oxo-4,5-dihydro-1,3,4-thiadiazole-2-carboxamide (CAS 85072-98-6)
- 2,3-Dihydro-1H-pyrrolo[3,2-b]pyridine-6-carbonitrile (CAS 1194683-74-3)
- 5,6-Dihydro-7,4-(azenometheno)benzofuran (CAS 123292-54-6)
- 1,5-Dihydro-4,7-(azenomethano)pyrrolo[3,4-c]pyridine (CAS 171543-13-8)
- 2,3-Dihydro-1H-pyrrolo[3,4-c]pyridine-6-carbonitrile (CAS 2092731-71-8)
- 6,7-Dihydro-5H-pyrrolo[3,4-b]pyridine-2-carbonitrile (CAS 2091881-44-4)
Recommended Standards
- 4-Nitrothiazol-2-amine (CAS 68969-22-2)
- 5-Amino-1,3,4-thiadiazole-2-carboxylic acid (CAS 63326-73-8)
- 4-Amino-1,2,5-thiadiazole-3-carboxylic acid (CAS 2829-58-5)
- 5-Nitro-1H-imidazole-4-thiol (CAS 6963-64-0)
- (2E)-3-(3,4-Dimethoxyphenyl)-2-(4-phenyl-1,3-thiazol-2-yl)prop-2-enenitrile (CAS 313687-64-8)
- N-(4-aminobenzyl)cyclopropanesulfonamide (CAS 1019855-83-4)
- 3-(2-Iodophenyl)-4-methyl-1h-pyrazol-5-amine (CAS 1187767-19-6)
- 6-chloro-5-methyl-2-(pyridin-2-yl)pyrimidin-4-amine (CAS 2060034-38-8)
- 2-Bromo-4-fluoro-N-(3-fluorobenzyl)aniline (CAS 1038978-91-4)
- NDI12-2Br (CAS 1444006-57-8)
- 2-[3-(diphenylmethyl)-1,2,4-oxadiazol-5-yl]acetonitrile (CAS 852933-96-1)
- Metoclopramide Impurity 89 (CAS CATO-C4X-141589)
- 2-((5-Benzyl-1,3,4-oxadiazol-2-yl)thio)-N-(1-cyanocyclohexyl)propanamide (CAS 875160-93-3)
- Semaglutide impurity 88 (CAS CATO-C4X-222688)
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