2,4-Dichloro-5-methylpyrimidine CAS 1780-31-0
| CAS No. | 1780-31-0 |
| Molecular Formula | C5H10Cl2N2 |
| Molecular Weight | 169.05 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The molecular framework of 2,4-Dichloro-5-methylpyrimidine (C5H10Cl2N2) is characterized by chlorine substitution. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
2,4-Dichloro-5-methylpyrimidine (CAS 1780-31-0), molecular formula C5H10Cl2N2 and molecular weight 169.05 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 | C5H10Cl2N2 |
| Molecular Weight | 169.05 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 | Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 1.0 |
| CAS Registry Year (est.) | 1957 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
Related Dichloro Standards
- 2,5-dichloro-3-methyl-pyrazine (CAS 107378-41-6)
- 3,5-dichloro-4-methyl-pyridazine (CAS 1351249-67-6)
- 2,2-Dichloro-1-methylcyclopropanecarboxylic acid (CAS 1447-14-9)
- 7,7-Dichloro-2,5-dioxabicyclo[4.1.0]heptane (CAS 53923-47-0)
- 3,4-Dichloro-5-hydroxyfuran-2(5H)-one (CAS 766-40-5)
- 5-[Dichloro(Fluoro)Methyl]-1,2-Oxazole (CAS 116584-44-2)
- 3,6-dichloro-5-methyl-1,2,4-triazine (CAS 132434-82-3)
- 5,6-dichloro-3-methyl-1,2,4-triazine (CAS 2386706-48-3)
Recommended Standards
- 2-chloro-5-(chloromethyl)pyrimidine (CAS 148406-13-7)
- 6-Chlorohexanoyl chloride (CAS 19347-73-0)
- 1,1-Dichloropinacolin (CAS 22591-21-5)
- 2,2-Dichlorohexanal (CAS 57024-78-9)
- 3-[(1h-indazol-7-yl)sulfamoyl]thiophene-2-carboxylic acid (CAS 1154239-90-3)
- 2-(5-[1,3]Dioxolan-2-yl-pyridin-2-yl)-6-oxo-1,6-dihydro-pyrimidine-5-carbonitrile (CAS 1227270-62-3)
- 2-Methyl-2-phenylcyclopropan-1-amine (CAS 19009-66-6)
- N4,2-Dimethylpyrimidine-4,6-diamine (CAS 14538-81-9)
- 2-Methylbutyl 2-cyano-2-(3-(4-methylpiperazin-1-yl)quinoxalin-2-yl)acetate (CAS 578000-11-0)
- 3-(1-(4-Chlorophenyl)-3-phenyl-1H-pyrazol-4-yl)propanoic acid (CAS 870704-02-2)
- Methyl 1-methyl-3-(trifluoromethyl)-1H-thieno[2,3-c]pyrazole-5-carboxylate (CAS 677704-91-5)
- 2-(2-(4-Methylpiperazin-1-yl)ethoxy)benzaldehyde (CAS 82625-37-4)
- 2,7-Dibromo-6-methoxybenzo[d]thiazole (CAS 440123-48-8)
- Semaglutide Impurity 167 (CAS CATO-C4X-2226167)
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