5-Chloropyrimidine-2-carbaldehyde CAS 944900-20-3
| CAS No. | 944900-20-3 |
| Molecular Formula | C5H3ClN2O |
| Molecular Weight | 142.54 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Based on its molecular formula C5H3ClN2O, 5-Chloropyrimidine-2-carbaldehyde contains an amide group, a hydroxyl group, an ether linkage, chlorine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 142.54 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).
5-Chloropyrimidine-2-carbaldehyde (CAS 944900-20-3), molecular formula C5H3ClN2O and molecular weight 142.54 g/mol, is a CATO reference standard with documented purity and traceability.
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 | C5H3ClN2O |
| Molecular Weight | 142.54 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1987 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
Related Chloropyrimidine Standards
- 2-Chloropyrimidine-4-carbaldehyde (CAS 944901-22-8)
- 4-Chloropyrimidine-5-carbaldehyde (CAS 933703-03-8)
- 2-Chloropyrimidine-4,5-diamine (CAS 14631-08-4)
- 4-Chloropyrimidine-2,5-diamine (CAS 14631-09-5)
- 5-Chloropyrimidine-2,4-diamine (CAS 18620-64-9)
- 2-Chloropyrimidine-4,6-diamine (CAS 53557-61-2)
- 2-Chloropyrimidine-4-methanol (CAS 34953-87-2)
- 5-Chloropyrimidine-4-carbonitrile (CAS 114969-65-2)
Recommended Standards
- 5-Chloropyrazine-2-carbaldehyde (CAS 88625-24-5)
- 6-Chloro-2-pyrazinecarbaldehyde (CAS 874114-34-8)
- 2-Pyrazinecarbonyl chloride (CAS 19847-10-0)
- 3-Pyridazinecarbonyl chloride (CAS 499770-82-0)
- 3-Chloro-4-cyclopropyl-6-methylpyridazine (CAS 1547068-28-9)
- 3-(4-Fluorophenyl)-2,6-dimethylquinazolin-4(3H)-one (CAS 216502-22-6)
- N-(4-isopropyl-3-methylphenyl)-1-methylhydrazine-1-carbothioamide (CAS 946386-73-8)
- Ethyl 3-fluoroisonicotinate (CAS 343-72-6)
- ethyl 4-methyl-4H-pyrrolo[2,3-d][1,3]thiazole-5-carboxylate (CAS 1379345-44-4)
- 3-Methyl-2-(piperidin-1-yl)-3H-indole (CAS 792843-42-6)
- n-(3-Methylbutyl)-1h-pyrazolo[3,4-d]pyrimidin-4-amine (CAS 56964-92-2)
- N-nitroso Cyclen Impurity 128(Gadobutrol Impurity 128) (CAS CATO-C4X-2120128)
- n-(4-Morpholinophenyl)isobutyramide (CAS 250714-61-5)
- Semaglutide impurity 71 (CAS CATO-C4X-222671)
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