2-Chloro-5-nitropyrimidin-4(1H)-one CAS 282101-98-8
| CAS No. | 282101-98-8 |
| Molecular Formula | C4H2ClN3O3 |
| Molecular Weight | 175.53 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Structurally, 2-Chloro-5-nitropyrimidin-4(1H)-one (C4H2ClN3O3) contains an amide group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution. The molecule exhibits a degree of unsaturation (DBE) of 5.0, corresponding to approximately 5 ring(s) or double-bond equivalent(s). With a molecular weight of 175.53 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.
2-Chloro-5-nitropyrimidin-4(1H)-one (CAS 282101-98-8), molecular formula C4H2ClN3O3 and molecular weight 175.53 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.
As a certified reference material (CRM), 2-Chloro-5-nitropyrimidin-4(1H)-one 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 | C4H2ClN3O3 |
| Molecular Weight | 175.53 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor, faint amine-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO, water |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 2025 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 3 |
Related Chloro Standards
- 6-Chloro-5-nitropyrimidin-4(1H)-one (CAS 3137-56-2)
- 4-Chloro-5-fluoropicolinic acid (CAS 1060802-35-8)
- 6-Chloro-4-fluoropicolinic acid (CAS 1060809-28-0)
- 6-chloro-4-fluoronicotinic acid (CAS 1060809-30-4)
- 3-Chloro-5-(trifluoromethyl)-1H-1,2,4-triazole (CAS 1199215-88-7)
- 3-Chloro-6-fluoropicolinic acid (CAS 1199243-95-2)
- 2-Chloro-6-fluoroisonicotinic Acid (CAS 1211521-09-3)
- 4-Chloro-6-fluoronicotinic acid (CAS 1211525-00-6)
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- Semaglutide Impurity 147 (CAS CATO-C4X-2226147)
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