3-chloro-5-methyl-1H-pyrazin-2-one CAS 89283-33-0
| CAS No. | 89283-33-0 |
| Molecular Formula | C5H9ClN2O |
| Molecular Weight | 148.59 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies 3-chloro-5-methyl-1H-pyrazin-2-one (CAS 89283-33-0), a certified reference material (molecular formula C5H9ClN2O, MW 148.59 g/mol) for analytical method development and quality control.
Owing to an amide group, a hydroxyl group, an ether linkage, chlorine substitution, 3-chloro-5-methyl-1H-pyrazin-2-one is typically white to off-white liquid. Its solid-state physicochemical attributes — including a molecular weight of 148.59 g/mol — guide the selection of appropriate sample preparation and analytical techniques. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
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), 3-chloro-5-methyl-1H-pyrazin-2-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 | C5H9ClN2O |
| Molecular Weight | 148.59 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) | 2.0 |
| CAS Registry Year (est.) | 1982 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
Related chloro Standards
- 6-chloro-2-methyl-2,3-dihydropyridazin-3-one (CAS 10071-38-2)
- 6-chloro-3-methyl-pyrimidin-4-one (CAS 101079-62-3)
- 2-(4-chloro-1H-pyrazol-1-yl)acetaldehyde (CAS 1015939-57-7)
- 6-chloro-3-methyl-1H-pyrazin-2-one (CAS 105985-19-1)
- 5-chloro-1-methyl-pyrazole-4-carbaldehyde (CAS 117007-77-9)
- 2-(5-chloro-1H-pyrazol-1-yl)acetaldehyde (CAS 1260642-65-6)
- Methyl 2-chloro-2-cyclopropylacetate (CAS 139132-18-6)
- 2-Chloro-1-(tetrahydrofuran-2-yl)ethanone (CAS 141060-98-2)
Recommended Standards
- 3-Chloro-2,2-dimethylbut-3-enoic acid (CAS 56663-75-3)
- 3-ethyloxetane-3-carbonyl chloride (CAS 28562-62-1)
- 3-chloro-1-methyl-1,2-dihydropyrazin-2-one (CAS 200562-22-7)
- 4-chloro-2-methyl-1H-imidazole-5-carbaldehyde (CAS 219504-20-8)
- 1-(2-(Trifluoromethyl)benzyl)piperidine-4-carboxylic acid (CAS 901920-49-8)
- (R)-2-((tert-Butoxycarbonyl)amino)-2-(3,4-dichlorophenyl)acetic acid (CAS 1241683-86-2)
- 4-Bromo-2-(trifluoromethoxy)benzonitrile (CAS 1187983-97-6)
- 3-Amino-1-Difluoromethyl-1H-Pyridin-2-One Hydrochloride (CAS 1422344-32-8)
- (R)-2-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)-3-(2,6-difluorophenyl)propanoic acid (CAS 1235020-13-9)
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