5-Hydroxy-1-methyl-3-phenyl-1h-pyrazole-4-carbonitrile CAS 139347-62-9
| CAS No. | 139347-62-9 |
| Molecular Formula | C11H9N3O |
| Molecular Weight | 199.21 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Owing to a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, 5-Hydroxy-1-methyl-3-phenyl-1h-pyrazole-4-carbonitrile is typically pale yellow to yellow low-melting solid. Its solid-state physicochemical attributes — including a molecular weight of 199.21 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
5-Hydroxy-1-methyl-3-phenyl-1h-pyrazole-4-carbonitrile (CAS 139347-62-9) is a high-purity analytical reference standard with the molecular formula C11H9N3O and a molecular weight of 199.21 g/mol.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
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 | C11H9N3O |
| Molecular Weight | 199.21 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 9.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1996 |
| Nitrogen Atoms | 3 |
Related Hydroxy Standards
- 2-Hydroxy-3-(pyridin-4-yl)benzaldehyde (CAS 1202677-86-8)
- 1-(2-Hydroxy-2-methylpropyl)-5-methyl-1h-1,2,3-triazole-4-carboxylic acid (CAS 1249257-62-2)
- 2-(R)-Hydroxy-4-oxo-4-phenylbutyric-d (CAS 1286934-16-4)
- 5-Hydroxy-3-methyl-1-phenyl-1H-pyrazole-4-carbonitrile (CAS 139347-67-4)
- 2-Hydroxy-6-phenylnicotinaldehyde (CAS 1501955-97-0)
- (2-Hydroxy-pyridin-3-yl)-phenyl-methanone (CAS 27039-12-9)
- 2-Hydroxy-5-(pyridin-3-yl)benzaldehyde (CAS 85633-41-6)
- 2-Hydroxy-5-(pyridin-4-yl)benzaldehyde (CAS 342037-21-2)
Recommended Standards
- 1,2-Dihydrocyclobuta[b]quinoline-8-carboxylic acid (CAS 13848-02-7)
- [2,3'-Bipyridine]-2'-carboxamide (CAS 1379361-24-6)
- 3-nitro-6H-1,6-naphthyridin-5-one (CAS 1408075-65-9)
- 3-(1H-indol-3-yl)-1H-1,2,4-triazol-5-amine (CAS 1374407-88-1)
- 3-(4-(n-(3-(Trifluoromethyl)phenyl)sulfamoyl)phenyl)acrylic acid (CAS 379729-52-9)
- N,N,N',N'-Tetraisopropylformamidinium tetrafluoroborate (CAS 369405-27-6)
- 6-Butyl-2-phenyl-1,3,6,2-dioxazaborocane (CAS 84549-45-1)
- 5-bromo-1-ethyl-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-1,2,3-triazole (CAS 2364586-78-5)
- 2-(4-Bromophenyl)-N,N-diethylethan-1-amine (CAS 174769-98-3)
- 3-(2-Methoxyphenyl)-N-(1-(3-methyl-1,2,4-oxadiazol-5-yl)cyclohexyl)propanamide (CAS 1396632-45-3)
- 2,3-Dimethyl-3H-imidazo[4,5-b]pyridine (CAS 41231-05-4)
- 5-(2-Methoxyethoxy)-2,3-dihydro-1H-inden-1-one (CAS 28945-97-3)
- Methyl (E)-3,7-dimethylocta-2,6-dienoate (CAS 1189-09-9)
- 59880-97-6 Chemotactic peptide F-Met-Leu-Phe L-Phenylalanine, N-(N-(N-formyl-L-methionyl)-L-leucyl)- N-Formyl-L-methionyl-L-leucyl-L-phenylalanine N-Formyl-Met-Leu-Phe N-Formylmethionine leucyl-phenylalanine fMLF fMLP (misnomer but widely used) (CAS 59880-97-6)
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