1,2-Dimethyl-3-oxo-5-phenyl-2,3-dihydro-1H-pyrazole-4-carboxylic acid CAS 3550-18-3
| CAS No. | 3550-18-3 |
| Molecular Formula | C12H12N2O3 |
| Molecular Weight | 232.24 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Owing to an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage, 1,2-Dimethyl-3-oxo-5-phenyl-2,3-dihydro-1H-pyrazole-4-carboxylic acid is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 232.24 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).
1,2-Dimethyl-3-oxo-5-phenyl-2,3-dihydro-1H-pyrazole-4-carboxylic acid (CAS 3550-18-3) is a high-purity analytical reference standard with the molecular formula C12H12N2O3 and a molecular weight of 232.24 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 | C12H12N2O3 |
| Molecular Weight | 232.24 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| 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.) | 1958 |
| Nitrogen Atoms | 2 |
Related Dimethyl Standards
- 4-(3,4-Dimethyl-5-oxo-2,5-dihydro-1H-pyrazol-1-yl)benzoic acid (CAS 1015844-45-7)
- 3-(3,4-Dimethyl-5-oxo-2,5-dihydro-1H-pyrazol-1-yl)benzoic acid (CAS 1015844-79-7)
- 2,2-dimethyl-1-[4-(trifluoromethyl)phenyl]propan-1-ol (CAS 109769-57-5)
- 2,2-Dimethyl-3-(4-(trifluoromethyl)phenyl)propan-1-ol (CAS 14248-28-3)
- 4-((1,3-Dimethyl-1H-pyrazol-5-yl)oxy)benzoic acid (CAS 1424857-07-7)
- Methyl 1,3-dimethyl-2-oxo-1,2-dihydroquinoxaline-6-carboxylate (CAS 1446786-32-8)
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- (3,5-Dimethyl-1H-pyrazol-1-yl)(2-methoxypyrimidin-5-yl)methanone (CAS 1774900-65-0)
Recommended Standards
- 1-(5-Aminopyridin-2-yl)-3,5-dimethyl-1H-pyrazole-4-carboxylic acid (CAS 955962-76-2)
- 1,5-Dimethyl-3-oxo-2-phenyl-2,3-dihydro-1H-pyrazole-4-carboxylic acid (CAS 83-10-3)
- 1-(4-methylphenyl)-6-oxo-1,4,5,6-tetrahydropyridaZine-3-carboxylic acid (CAS 926240-25-7)
- 1-[(4-Methoxyphenyl)methyl]-1H-imidazole-2-carboxylic acid (CAS 732206-58-5)
- (R)-1-(4-bromo-3-fluorophenyl)pentan-1-amine (CAS 1259722-30-9)
- Pentafluoroethyl 2,2,2-trifluoroethyl ether (CAS 156053-88-2)
- 2-[4-(4-Methoxybenzenesulfonyl)-3,4-dihydro-2H-1,4-benzoxazin-3-yl]acetic acid (CAS 865657-74-5)
- N-(3,4-dimethylphenyl)-2-((4-fluorophenyl)sulfonamido)-4-methylpentanamide (CAS 317378-00-0)
- 2-(2,6-Dimethylphenoxy)ethanamine (CAS 1749-46-8)
- 1H-Pyrazole-5-carboxylicacid, 1-ethyl-3-methyl-, methyl ester 88398-73-6 CTK5F9772 (CAS 88398-73-6)
- 4-Chloro-6-methyl-7H-pyrrolo[2,3-d]pyrimidine-5-carboxylic acid (CAS 2306273-26-5)
- Dimethyl oxazole-4,5-dicarboxylate (CAS 72030-81-0)
- Chloro(triethylphosphine)gold(I) (CAS 15529-90-5)
- Peptide YY (3-36) (canine, mouse, porcine, rat) trifluoroacetate salt (CAS 126339-09-1)
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