7-chloropyrazolo[1,5-a]pyrimidine-3-carbonitrile CAS 1159982-97-4
| CAS No. | 1159982-97-4 |
| Molecular Formula | C7H3ClN4 |
| Molecular Weight | 178.58 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies 7-chloropyrazolo[1,5-a]pyrimidine-3-carbonitrile (CAS 1159982-97-4), a certified reference material (molecular formula C7H3ClN4, MW 178.58 g/mol) for analytical method development and quality control.
Based on its molecular formula C7H3ClN4, 7-chloropyrazolo[1,5-a]pyrimidine-3-carbonitrile contains a nitrile group, chlorine substitution, an aromatic ring system; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 178.58 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
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.
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 | C7H3ClN4 |
| Molecular Weight | 178.58 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor, faint amine-like odor) |
| 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) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1989 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 4 |
Related chloropyrazolo Standards
- 4-Chloropyrazolo[1,5-a]pyridine-7-carbonitrile (CAS 1268520-74-6)
- 4-Chloropyrazolo[1,5-a]pyridine-3-carbonitrile (CAS 2111218-74-5)
- 5-chloropyrazolo[1,5-a]pyrimidin-3-amine (CAS 1234616-50-2)
- 5-Chloropyrazolo[1,5-a]pyridine-3-carbaldehyde (CAS 1101120-49-3)
- 5-Chloropyrazolo[1,5-a]pyrimidine-3-carbaldehyde (CAS 1256162-94-3)
- 7-Chloropyrazolo[1,5-a]pyrimidine-5-carbaldehyde (CAS 1346569-73-0)
- (5-Chloropyrazolo[1,5-a]pyridin-2-yl)methanamine (CAS 886364-32-5)
- (5-Chloropyrazolo[1,5-a]pyrimidin-3-yl)methanamine (CAS 1263059-89-7)
Recommended Standards
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- (2E)-7-Chloro-2-{[(3-chlorophenyl)amino]methylidene}-3,4-dihydro-2H-1,4-benzothiazin-3-one (CAS 338417-09-7)
- 1-(1-Cyclopropylethyl)-1h-1,2,4-triazol-5-amine (CAS 1248627-68-0)
- Tert-butyl (S)-6-(6-ethynyl-1H-benzo[d]imidazol-2-yl)-5-azaspiro[2.4]Heptane-5-carboxylate (CAS 1430105-04-6)
- 8,9-di-O-Methyl-urolithin C (CAS 126438-35-5)
- 2-(2-Chloroethyl)-3-methylpyridine (CAS 1240412-09-2)
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