2,4-Dichloro-5,6-dimethylpyrimidine CAS 1780-32-1
| CAS No. | 1780-32-1 |
| Molecular Formula | C6H6Cl2N2 |
| Molecular Weight | 177.03 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
2,4-Dichloro-5,6-dimethylpyrimidine (CAS 1780-32-1), molecular formula C6H6Cl2N2 and molecular weight 177.03 g/mol, is a CATO reference standard with documented purity and traceability.
Structurally, 2,4-Dichloro-5,6-dimethylpyrimidine (C6H6Cl2N2) contains a nitrile group, chlorine substitution, an aromatic ring system. The molecule exhibits a degree of unsaturation (DBE) of 4.0, corresponding to approximately 4 ring(s) or double-bond equivalent(s). With a molecular weight of 177.03 g/mol, it falls into the medium-molecular-weight range. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
As a certified reference material (CRM), 2,4-Dichloro-5,6-dimethylpyrimidine meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Physical & Chemical Properties
| Molecular Formula | C6H6Cl2N2 |
| Molecular Weight | 177.03 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor, faint amine-like odor, low volatility) |
| 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 |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1957 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
Related Dichloro Standards
- 4,5-Dichloro-2,6-dimethylpyrimidine (CAS 105742-66-3)
- 3,6-Dichloro-4-ethylpyridazine (CAS 107228-54-6)
- 2,4-Dichloro-5-methylphenol (CAS 1124-07-8)
- 4,6-Dichloro-2-ethylpyrimidine (CAS 1195-34-2)
- 2,6-dichloro-4-methylpyridin-3-amine (CAS 129432-25-3)
- 3,5-Dichloro-2-ethylpyrazine (CAS 1314936-02-1)
- 2,6-Dichloro-3-methylphenol (CAS 13481-70-4)
- 2,6-Dichloro-N-methylpyridin-3-amine (CAS 142670-86-8)
Recommended Standards
- 2,4-Dichloro-3-methylphenol (CAS 17788-00-0)
- 4,6-Dichloro-2,5-dimethylpyrimidine (CAS 1780-33-2)
- 2,6-Dichloro-N-methylpyridin-4-amine (CAS 175461-33-3)
- 2,4-Dichloro-6-methylpyridin-3-amine (CAS 179056-98-5)
- 4-(2,6-Difluorophenyl)-1,3-oxazol-2-amine (CAS 1249863-38-4)
- (2-Amino-6-methylpyrimidin-4-yl)boronic acid (CAS 1309981-57-4)
- N-(5-Methylisoxazol-3-yl)-6-(1H-1,2,4-triazol-1-yl)pyridazine-3-carboxamide (CAS 1448130-88-8)
- (S)-n-methyl-1,2,3,4-tetrahydronaphthalen-1-amine (CAS 49681-43-8)
- 2-(5-Amino-3-(furan-2-yl)-1h-pyrazol-1-yl)acetic acid (CAS 890014-51-4)
- Methyl 1-[(1E)-1-amino-2-cyano-2-(methylcarbamothioyl)eth-1-en-1-yl]piperidine-4-carboxylate (CAS 338422-52-9)
- 4-(p-Tolyl)-1,10-phenanthroline (CAS 94211-97-9)
- L-Prolinanilide (CAS 64030-43-9)
- 2,3-dimethyl-6,7-dihydro-5H-indazol-4-one (CAS 1356596-20-7)
- Semaglutide Impurity 139 (CAS CATO-C4X-2226139)
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