2-Oxo-4-thioxo-1,2,3,4-tetrahydropyrimidine-5-carbaldehyde CAS 144850-43-1
| CAS No. | 144850-43-1 |
| Molecular Formula | C5H4N2O2S |
| Molecular Weight | 156.16 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
2-Oxo-4-thioxo-1,2,3,4-tetrahydropyrimidine-5-carbaldehyde (C5H4N2O2S) 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. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
2-Oxo-4-thioxo-1,2,3,4-tetrahydropyrimidine-5-carbaldehyde (CAS 144850-43-1), molecular formula C5H4N2O2S and molecular weight 156.16 g/mol, is a CATO reference standard with documented purity and traceability.
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 | C5H4N2O2S |
| Molecular Weight | 156.16 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) | 5.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1998 |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |
Related Oxo Standards
- 2-Thioxo-1,2-dihydropyrimidine-4-carboxylic acid (CAS 6972-13-0)
- 6-Thioxo-1,6-dihydropyridazine-3-carboxylic acid (CAS 83673-86-3)
- 6-Thioxo-1,6-dihydropyrimidine-4-carboxylic acid (CAS 6944-71-4)
- 6-Thioxo-5,7-diazaspiro[3.4]octan-8-one (CAS 1556929-79-3)
- 1-(3-Methyl-5-thioxo-4,5-dihydro-1H-pyrazol-4-yl)ethanone (CAS 211988-12-4)
- 3-Ethyl-4-thioxo-3,4-dihydropyrimidin-2(1H)-one (CAS 50680-83-6)
- 4-Thioxo-1,4-dihydropyrimidine-5-carboxamide (CAS 102818-21-3)
- 3-Thioxo-3,4-dihydropyrazine-2-carboxamide (CAS 131295-39-1)
Recommended Standards
- 1-(2-Fluoroethyl)-5-methyl-1H-pyrazole-4-carbaldehyde (CAS 1443279-51-3)
- 2-Amino-1-(5-fluoropyridin-3-yl)ethan-1-ol (CAS 1480753-69-2)
- 1-(2-Fluoroethyl)-4-methyl-1H-pyrazole-5-carbaldehyde (CAS 1429417-95-7)
- (2-fluoro-4-methoxyphenyl)hydrazine (CAS 154080-00-9)
- 5-(Pyrimidin-5-yl)-1H-indole (CAS 144104-51-8)
- 3-((6-Chloropyridazin-3-yl)amino)thieno[3,2-d]pyrimidin-4(3H)-one (CAS 339008-35-4)
- Terbium(III) sulfate octahydrate (CAS 13842-67-6)
- 2-Chloro-4-(1-imidazolyl)benzaldehyde (CAS 1141669-45-5)
- 1-tert-Butyl 4-ethyl 3-hydroxy-4-methylpiperidine-1,4-dicarboxylate (CAS 1823275-17-7)
- Oxomemazine Diamine Impurity (CAS 67952-96-9)
- 2-Benzoyl-4,5-dichlorobenzoic acid (CAS 33184-58-6)
- (S)-2-(2-Amino-3-(1-formyl-1H-indol-3-yl)propanamido)acetic acid (CAS 89754-31-4)
- N,N-Dimethyl-1-(4-nitro-2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)methanamine (CAS 2096335-98-5)
- Semaglutide Impurity 187 (CAS CATO-C4X-2226187)
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