5-amino-1-phenyl-2,3-dihydro-1H-pyrazol-3-one CAS 70373-98-7
| CAS No. | 70373-98-7 |
| Molecular Formula | C9H9N3O |
| Molecular Weight | 175.19 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 175.19 g/mol gives 5-amino-1-phenyl-2,3-dihydro-1H-pyrazol-3-one distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
5-amino-1-phenyl-2,3-dihydro-1H-pyrazol-3-one (CAS 70373-98-7), molecular formula C9H9N3O and molecular weight 175.19 g/mol, is a CATO reference standard with documented purity and traceability.
5-amino-1-phenyl-2,3-dihydro-1H-pyrazol-3-one (C9H9N3O) contains a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage. Its physicochemical properties are representative of its class; 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).
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 | C9H9N3O |
| Molecular Weight | 175.19 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (faint amine-like odor) |
| 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) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1977 |
| Nitrogen Atoms | 3 |
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Recommended Standards
- 5-(P-tolyl)-1,3,4-oxadiazol-2-amine (CAS 33621-60-2)
- 5-Amino-2-cyclopropoxynicotinonitrile (CAS 2169074-23-9)
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- 5-Amino-2-phenyl-1,2-dihydropyrazol-3-one (CAS 28710-97-6)
- Silodosin Keto Impurity (CAS 350797-57-8)
- 3-(2-Fluorophenyl)-5-(1-methyl-4,5,6,7-tetrahydro-1H-pyrazolo[4,3-c]pyridin-3-yl)-1,2,4-oxadiazole hydrochloride (CAS 1306739-63-8)
- (4aR,6S,7R,8R,8aS)-8-(Allyloxy)-6-(4-methoxyphenoxy)-2-phenylhexahydropyrano[3,2-d][1,3]dioxin-7-ol (CAS 1708088-34-9)
- [4,4′-Bis(trifluoromethyl)-2,2′-bipyridine-κN1,κN1′]bis[5-(1,1-dimethylethyl)-2-[4-(1,1-dimethylethyl)-2-pyridinyl-κN]phenyl-κC]-, (OC-6-33)-Iridium(1+), hexafluorophosphate(1-) (1:1) (CAS 2757085-13-3)
- (2S)-2-Amino-N-benzylpropanamide (CAS 75040-72-1)
- 109310-93-2 4-(3-Benzyl-thioureido)-benzoic acid 4-(3-benzylthioureido)benzoic acid (CAS 109310-93-2)
- 2-(((1R,4r)-4-((tert-butoxycarbonyl)amino)cyclohexyl)oxy)acetic acid (CAS 1315498-60-2)
- (2S)-2-(pyridin-3-ylformamido)propanoic acid (CAS 36724-75-1)
- (R)-2-(Piperidin-2-yl)ethanamine (CAS 1262326-82-8)
- Semaglutide impurity 194 (CAS CATO-C4X-2226194)
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