1,5-Diphenyl-1H-pyrazole-3-carboxylic acid CAS 13599-22-9
| CAS No. | 13599-22-9 |
| Molecular Formula | C16H12N2O2 |
| Molecular Weight | 264.28 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.
1,5-Diphenyl-1H-pyrazole-3-carboxylic acid (CAS 13599-22-9), molecular formula C16H12N2O2 and molecular weight 264.28 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, 1,5-Diphenyl-1H-pyrazole-3-carboxylic acid is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 264.28 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.
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 | C16H12N2O2 |
| Molecular Weight | 264.28 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) | 12.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1960 |
| Nitrogen Atoms | 2 |
Related Diphenyl Standards
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Recommended Standards
- Ethyl 4-methyl-2-(3-oxopiperazin-1-yl)pyrimidine-5-carboxylate (CAS 1355179-78-0)
- 2-(3-(Cyclopentylcarbamoyl)-2-oxopyridin-1(2H)-yl)acetic acid (CAS 1361114-86-4)
- 2-[3-(2-Hydroxybutyl)-2-oxo-2,3-dihydro-1H-benzimidazol-1-yl]acetic acid (CAS 1353497-19-4)
- tert-Butyl 4-nitroindoline-1-carboxylate (CAS 1362855-40-0)
- 14391-28-7 Rhenium, isotope of mass 185 Rhenium-185 185Re (CAS 14391-28-7)
- 1-(3-Bromopropyl)-4-ethylpiperazine (CAS 803632-62-4)
- 2-(((4-Chlorophenyl)amino)methyl)isoindoline-1,3-dione (CAS 30818-65-6)
- Clozapine impurity 10 (CAS 67990-66-3)
- 6-(4-Isopropylpiperazin-1-yl)pyridin-3-amine (CAS 837421-41-7)
- 3-(Benzylsulfanyl)-1-(4-chlorophenyl)-5,6,7,8-tetrahydroisoquinoline-4-carbonitrile (CAS 439096-90-9)
- (5E)-3-(2-Chlorophenyl)-5-{[4-(cyclohexylsulfanyl)-3-nitrophenyl]methylidene}-2-sulfanylidene-1,3-thiazolidin-4-one (CAS 298215-94-8)
- 1-Oxaspiro[2.5]octane (CAS 185-70-6)
- 2-[4-(1-Hydroxyethyl)phenoxy]-2-methylpropanoic acid (CAS 1253527-88-6)
- Glu17-Semaglutide (CAS CATO-C4X-2226209)
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