Methyl 3-phenyl-1H-pyrazole-4-carboxylate CAS 21031-22-1
| CAS No. | 21031-22-1 |
| Molecular Formula | C11H10N2O2 |
| Molecular Weight | 202.21 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), Methyl 3-phenyl-1H-pyrazole-4-carboxylate 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.
Methyl 3-phenyl-1H-pyrazole-4-carboxylate (CAS 21031-22-1), molecular formula C11H10N2O2 and molecular weight 202.21 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage, Methyl 3-phenyl-1H-pyrazole-4-carboxylate is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 202.21 g/mol — guide the selection of appropriate sample preparation and analytical techniques. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C11H10N2O2 |
| Molecular Weight | 202.21 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.) | 1963 |
| Nitrogen Atoms | 2 |
Recommended Standards
- Methyl 3-aminoquinoline-4-carboxylate (CAS 75353-51-4)
- Methyl 3-phenyl-1H-pyrazole-5-carboxylate (CAS 856061-37-5)
- Methyl 3-(furan-2-yl)benzoate (CAS 207845-31-6)
- methyl 3-phenylfuran-2-carboxylate (CAS 71237-44-0)
- 6-Bromo-3-fluoro-2-(2-fluoropropan-2-yl)pyridine (CAS 2504010-54-0)
- 4-Bromoisoxazole-5-carbaldehyde (CAS 1367950-71-7)
- 5-Chloro-8-methylquinoline-2-carbaldehyde (CAS 186670-52-0)
- 2,2,5-trimethylpyrrolidine hydrochloride (CAS 6620-67-3)
- Nimodipine Impurity 20 (CAS CATO-C4X-138520)
- Pyrazolo[1,5-a]pyrimidin-7(4H)-one (CAS 29274-23-5)
- [5-(Difluoromethyl)pyridin-2-yl]methanol (CAS 1780886-64-7)
- 2-(3-Formyl-1H-indol-1-yl)-N-(2-(trifluoromethyl)phenyl)acetamide (CAS 692280-64-1)
- 5-(tert-Butyl)-3-cyclopropoxypicolinic acid (CAS 1243448-29-4)
- Endo-Pro36-Tirzepatide (CAS CATO-CPTD788688)
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