7-[(E)-2-(4-Chlorophenyl)ethenyl]-[1,2,4]triazolo[1,5-a]pyrimidine CAS 320416-44-2
| CAS No. | 320416-44-2 |
| Molecular Formula | C13H9ClN4 |
| Molecular Weight | 256.69 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
7-[(E)-2-(4-Chlorophenyl)ethenyl]-[1,2,4]triazolo[1,5-a]pyrimidine (CAS 320416-44-2), molecular formula C13H9ClN4 and molecular weight 256.69 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to a nitrogen-containing heterocyclic scaffold, a nitrile group, chlorine substitution, 7-[(E)-2-(4-Chlorophenyl)ethenyl]-[1,2,4]triazolo[1,5-a]pyrimidine is typically pale yellow to yellow low-melting solid. Its solid-state physicochemical attributes — including a molecular weight of 256.69 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C13H9ClN4 |
| Molecular Weight | 256.69 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 | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 11.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2025 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 4 |
Related E Standards
- 2-(1-(4-Chlorophenyl)-1H-pyrazol-5-yl)pyrimidine (CAS 1269291-24-8)
- 2-(1-(2-Chlorophenyl)-1H-pyrazol-5-yl)pyrimidine (CAS 1269293-18-6)
- 2-(1-(3-Chlorophenyl)-1H-pyrazol-5-yl)pyrimidine (CAS 1269293-31-3)
- 2-(2-chlorophenyl)-3-oxo-3-(pyridin-3-yl)propanenitrile (CAS 1291439-19-4)
- 2-(4-Chlorophenyl)phthalazin-2-ium-4-olate (CAS 156453-05-3)
- 2-(4-Chlorophenyl)phthalazin-1(2H)-one (CAS 161716-23-0)
- 2-(4-Chlorophenyl)-5-phenyl-1,3,4-oxadiazole (CAS 1874-43-7)
- (4-Chlorophenyl)(imidazo[1,2-a]pyridin-3-yl)methanone (CAS 261948-83-8)
Recommended Standards
- 6-Chloro-4-phenyl-2(1H)-quinazolinone (CAS 4797-43-7)
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- 6-Chloro-2-phenylimidazo[1,2-a]pyridine-3-carbaldehyde (CAS 727976-26-3)
- 7-Chloro-2-phenyl-3H-quinazolin-4-one (CAS 7012-94-4)
- 1-[(5-ethyl-1,2,4-oxadiazol-3-yl)methyl]-N-methylpiperidin-3-amine (CAS 1249225-78-2)
- Pitavastatin Impurity 16 (CAS 849811-78-5)
- (4-Fluorophenyl)(2-((4-methylbenzyl)thio)-4,5-dihydro-1H-imidazol-1-yl)methanone (CAS 851805-04-4)
- Trimethyl Bromoorthoacetate (CAS 40070-40-4)
- 3-(Trifluoromethyl)benzyl acrylate (CAS 144261-45-0)
- 2-(Piperidin-4-yl)benzamide (CAS 1260846-90-9)
- N-(1-Methyl-1H-pyrrol-3-yl)acetamide (CAS 62187-86-4)
- 2-Amino-3-chloro-4-fluorobenzoic acid (CAS 1855799-43-7)
- N-((1-Ethyl-1H-benzo[d]imidazol-2-yl)methyl)-1-isopropyl-1H-benzo[d]imidazol-2-amine (CAS 736938-08-2)
- Neuropeptide Y (2-36), amide, porcine (CAS 102961-52-4)
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