Pyrimidine-2-carbothioamide CAS 4537-73-9
| CAS No. | 4537-73-9 |
| Molecular Formula | C5H5N3S |
| Molecular Weight | 139.18 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Pyrimidine-2-carbothioamide (CAS 4537-73-9), molecular formula C5H5N3S and molecular weight 139.18 g/mol, is a CATO reference standard with documented purity and traceability.
Pyrimidine-2-carbothioamide (C5H5N3S) contains a nitrile group, sulfur-containing functionality. Its physicochemical properties are representative of its class; 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).
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 | C5H5N3S |
| Molecular Weight | 139.18 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1958 |
| Nitrogen Atoms | 3 |
| Sulfur Atoms | 1 |
Related Pyrimidine Standards
- pyrimidine-4-carbothioamide (CAS 88891-74-1)
- Pyrimidine-5-carbothioamide (CAS 88891-75-2)
- Pyrimidine-2,4-diyldimethanol (CAS 4425-66-5)
- Pyrimidine-4,6-diyldimethanol (CAS 50345-29-4)
- 35231-57-3 Pyrimidine, 5-ethoxy-2-methyl- (9CI) (CAS 35231-57-3)
- Pyrimidine-2-carboxylic acid hydrazide (CAS 87362-28-5)
- Pyrimidine-5-carbohydrazide (CAS 40929-42-8)
- methyl pyrimidine-2-carboxylate (CAS 34253-03-7)
Recommended Standards
- Pyridazine-4-carbothioamide (CAS 39123-43-8)
- 6-METHYLTHIAZOLO[3,2-B][1,2,4]TRIAZOLE (CAS 34179-62-9)
- 5-Amino-3-methylisothiazole-4-carbonitrile (CAS 41808-35-9)
- (R)-2-Cyclohexyl-2-hydroxyacetonitrile (CAS 100007-62-3)
- 1-Methyl-4-(4-piperidinylmethyl)piperazinedihydrochloride (CAS 1219957-15-9)
- 4-(4-Chlorophenyl)-6-(dimethylamino)-2-(pyridin-3-yl)pyrimidine-5-carbonitrile (CAS 320417-53-6)
- 7-Methoxy-1,2,3,4-tetrahydroisoquinolin-6-ol (CAS 1011-43-4)
- 1,7-Dichloro-4-methylpyrido[3,4-d]pyridazine (CAS 2654746-98-0)
- 2,4-Dichloro-3-fluorobenzamide (CAS 1803718-49-1)
- 2-(1,3-benzodioxol-5-ylmethylene)malononitrile (CAS 2972-82-9)
- N-Methyl-N'-cyclopropyl ethylenediamine (CAS 483303-55-5)
- 2-(methylsulfanyl)pyrrolo[2,1-f][1,2,4]triazin-5-ol (CAS 1233181-73-1)
- 7-(Chlorodifluoromethyl)-5-methyl-3-(thiophen-2-yl)pyrazolo[1,5-a]pyrimidine (CAS 692733-12-3)
- Tau Peptide (294-305) (human) trifluoroacetate salt (CAS 1428135-29-8)
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