5-Methyl-2-(3-nitrophenyl)-2,4-dihydro-3H-pyrazol-3-one CAS 119-16-4
| CAS No. | 119-16-4 |
| Molecular Formula | C10H9N3O3 |
| Molecular Weight | 219.20 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
CATO supplies 5-Methyl-2-(3-nitrophenyl)-2,4-dihydro-3H-pyrazol-3-one (CAS 119-16-4), a certified reference material (molecular formula C10H9N3O3, MW 219.20 g/mol) for analytical method development and quality control.
5-Methyl-2-(3-nitrophenyl)-2,4-dihydro-3H-pyrazol-3-one (C10H9N3O3) contains an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage. It is notably hygroscopic, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
CATO manufactures 5-Methyl-2-(3-nitrophenyl)-2,4-dihydro-3H-pyrazol-3-one under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C10H9N3O3 |
| Molecular Weight | 219.20 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (faint amine-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1957 |
| Nitrogen Atoms | 3 |
Related Methyl Standards
- 5-Ethyl-3-(4-nitrophenyl)-1,2,4-oxadiazole (CAS 10185-65-6)
- 5-Ethyl-3-(3-nitrophenyl)-1,2,4-oxadiazole (CAS 10364-69-9)
- 3-(2-Methyl-6-nitrophenyl)isoxazol-5-amine (CAS 1152517-46-8)
- 5-Methyl-1-(2-nitrophenyl)-2,3-dihydro-1h-imidazol-2-one (CAS 1197478-23-1)
- 1-(2-nitrophenyl)-3-prop-2-yn-1-ylurea (CAS 1197861-80-5)
- [4-(4-nitrophenyl)-1h-imidazol-2-yl]methanol (CAS 1340189-83-4)
- 5-methyl-1-(3-nitrophenyl)-2,3-dihydro-1H-imidazol-2-one (CAS 13870-56-9)
- 5-(2-Methyl-5-nitrophenyl)isoxazol-3-amine (CAS 1466725-28-9)
Recommended Standards
- 2-Amino-2-[3-(trifluoromethyl)phenyl]-1-propanol (CAS 1183323-24-1)
- 3-methyl-5-(3-methyl-4-nitrophenyl)-1,2,4-oxadiazole (CAS 1193389-23-9)
- 2-Amino-2-(2-(trifluoromethyl)phenyl)propan-1-ol (CAS 1183280-94-5)
- 3-Methyl-5-(4-methyl-3-nitrophenyl)-1,2,4-oxadiazole (CAS 1193389-83-1)
- 5-Chloro-N-(2-ethoxyphenyl)-2-(methylthio)pyrimidine-4-carboxamide (CAS 898646-93-0)
- 2-(5-Fluorobenzo[d]thiazol-2-yl)ethan-1-amine (CAS 1096279-13-8)
- 1-(2-phenylethyl)-1H-pyrazol-5-amine (CAS 3524-23-0)
- 5-Bromo-6-chloro-2-(1H-1,2,4-triazol-1-yl)pyrimidin-4-amine (CAS 1620910-77-1)
- 1,3-Dimethyl-2-(sulfinylamino)benzene (CAS 17420-02-9)
- 1-(4-((Benzylsulfonyl)methyl)-4-hydroxypiperidin-1-yl)-2,2-dimethylpropan-1-one (CAS 865659-38-7)
- tert-Butyl (5-((trimethylsilyl)ethynyl)thiazol-2-yl)carbamate (CAS 957147-21-6)
- (2-Iodo-3-methylphenyl)methanol (CAS 100959-88-4)
- (S)-5-(diphenyl((trimethylsilyl)oxy)methyl)-2-mesityl-6,7-dihydro-5H-pyrrolo[2,1-c][1,2,4]triazol-2-ium tetrafluoroborate (CAS 1126669-25-7)
- (Glu9)-Exenatide (2-39) trifluoroacetate salt (CAS 196109-34-9)
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