6-Chloro-5-methylpyrimidin-4(1H)-one CAS 18261-42-2
| CAS No. | 18261-42-2 |
| Molecular Formula | C5H5ClN2O |
| Molecular Weight | 144.56 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Based on its molecular formula C5H5ClN2O, 6-Chloro-5-methylpyrimidin-4(1H)-one 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 144.56 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).
6-Chloro-5-methylpyrimidin-4(1H)-one (CAS 18261-42-2), molecular formula C5H5ClN2O and molecular weight 144.56 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 | C5H5ClN2O |
| Molecular Weight | 144.56 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) | 4.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1962 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
Related Chloro Standards
- 6-Chloro-5-methylpyrimidin-2(1H)-one (CAS 101080-24-4)
- 4-Chloro-2-methylpyrimidin-5-ol (CAS 103660-23-7)
- 5-Chloro-4-methyl-2,3-dihydropyridazin-3-one (CAS 104566-45-2)
- 2-Chloro-5-(hydroxymethyl)pyrimidine (CAS 1046816-75-4)
- 4-Chloro-5-methyl-1H-pyrazole-3-carbaldehyde (CAS 1050642-24-4)
- 5-Chloro-3-methylpyrazin-2(1H)-one (CAS 105985-18-0)
- 5-Chloro-4-methylpyrimidine 1-oxide (CAS 114969-55-0)
- 5-Chloro-4-methoxypyrimidine (CAS 114969-94-7)
Recommended Standards
- 6-Chloro-5-methylpyridazin-3-ol (CAS 1822677-94-0)
- 6-Chloro-4-methylpyridazin-3(2H)-one (CAS 1834-27-1)
- 2-Amino-6-chloropyridin-4-ol (CAS 1807019-50-6)
- 6-Chloro-4-methylpyridazin-3-ol (CAS 1849390-26-6)
- (S)-2,2'-Dihydroxy-[1,1'-binaphthalene]-3-carboxaldehyde (CAS 345659-34-9)
- 7-Bromo-6-methyl-1,2,3,4-tetrahydropyrido[2,3-b]pyrazine (CAS 1227075-76-4)
- 5-Chloro-4-(piperazin-1-yl)pyridine-3-sulfonamide (CAS 1352531-15-7)
- Methyl 3-[3-(benzyloxy)phenyl]-4-fluorobenzoate (CAS 1393441-85-4)
- 8-Nitrocinnolin-4-ol (CAS 2096-40-4)
- N-(5-Cyclopropoxy-6-isopropoxypyridin-2-yl)methanesulfonamide (CAS 1243313-65-6)
- 2-(Bicyclo[2.2.1]heptan-1-yl)ethan-1-ol (CAS 129917-18-6)
- 5-Cyclopropyl-1-(cyclopropylmethyl)-1h-1,2,3-triazole-4-carboxylic acid (CAS 1249186-63-7)
- 2-[(4-chloro-3-nitrophenyl)formamido]acetic acid (CAS 129824-55-1)
- Smac-N7 Peptide (CAS 401913-57-3)
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