3-(4-aminophenyl)-1-phenyl-1H-pyrazole-4-carboxylic acid CAS 1017526-20-3
| CAS No. | 1017526-20-3 |
| Molecular Formula | C16H13N3O2 |
| Molecular Weight | 279.29 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
3-(4-aminophenyl)-1-phenyl-1H-pyrazole-4-carboxylic acid (CAS 1017526-20-3) is a high-purity analytical reference standard with the molecular formula C16H13N3O2 and a molecular weight of 279.29 g/mol.
Owing to a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, 3-(4-aminophenyl)-1-phenyl-1H-pyrazole-4-carboxylic acid is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 279.29 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).
This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.
As a certified reference material (CRM), 3-(4-aminophenyl)-1-phenyl-1H-pyrazole-4-carboxylic acid meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Physical & Chemical Properties
| Molecular Formula | C16H13N3O2 |
| Molecular Weight | 279.29 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.) | 1988 |
| Nitrogen Atoms | 3 |
Related aminophenyl Standards
- 1-(4-Aminophenyl)-5-phenyl-1h-pyrazole-3-carboxylic acid (CAS 957505-58-7)
- 5-(3-Aminophenyl)-1-ethyl-2-phenyl-1H-pyrazol-3(2H)-one (CAS 194799-53-6)
- Bis(4-aminophenyl)hydrogenphosphate (CAS 407578-85-2)
- 3-((2-Aminophenyl)amino)-5-phenylcyclohex-2-en-1-one (CAS 400873-42-9)
- 5-((4-Aminophenyl)amino)-1,6-dihydro-[1,1'-biphenyl]-3(2H)-one (CAS 395655-51-3)
- 5-(2-(4-Aminophenyl)propan-2-yl)quinolin-8-ol (CAS 57150-14-8)
- N-(4-aminophenyl)-4-(trifluoromethyl)benzamide (CAS 1011244-70-4)
- N-(2-aminophenyl)-3-(trifluoromethyl)benzamide (CAS 400073-82-7)
Recommended Standards
- (3R,4R)-4-(((benzyloxy)carbonyl)amino)tetrahydro-2H-pyran-3-carboxylic acid (CAS 1016258-81-3)
- Methyl (6,7-dimethoxy-2-oxo-1,2,3,4-tetrahydroquinolin-4-yl)acetate (CAS 1020242-41-4)
- 2-(4-Methoxy-6-methyl-5,6,7,8-tetrahydro-[1,3]dioxolo[4,5-g]isoquinolin-5-yl)acetic acid (CAS 100719-12-8)
- (E)-2-(((4,6-dimethylpyrimidin-2-yl)imino)methyl)-3-hydroxy-1H-inden-1-one (CAS 1024146-89-1)
- Methyl 3-bromo-4-((4-methylbenzyl)oxy)benzoate (CAS 1382775-12-3)
- (5E)-5-[(2-fluorophenyl)methylidene]-2-sulfanylidene-1,3-thiazolidin-4-one 350-22-1 MS-1537 (CAS 350-22-1)
- 2-Methylenequinuclidin-3-one (CAS 5291-26-9)
- (2E)-2-[2-(3,5-Dichlorophenyl)hydrazin-1-ylidene]-3-(4-methylphenyl)-3-oxopropanal (CAS 338400-38-7)
- (R)-2-Amino-2-(3-(trifluoromethoxy)phenyl)acetic acid (CAS 1228569-10-5)
- Methyl 2,3-dibromo-4-fluorophenylacetate (CAS 1803817-37-9)
- 1-Acetyl-3-methylpyrrolidine-3-carboxylic acid (CAS 1342361-74-3)
- N-(((9H-fluoren-9-yl)methoxy)carbonyl)-N-(but-3-en-1-yl)-L-leucine (CAS 1188391-88-9)
- Mepivacaine EP Impurity D HCl (CAS CATO-C4X-19282)
- [His]1+12-Semaglutide (CAS CATO-C4X-2226178)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com