methyl 3-(2-methoxy-5-methylphenyl)-1H-pyrazole-5-carboxylate CAS 1276540-43-2
| CAS No. | 1276540-43-2 |
| Molecular Formula | C13H14N2O3 |
| Molecular Weight | 246.26 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies methyl 3-(2-methoxy-5-methylphenyl)-1H-pyrazole-5-carboxylate (CAS 1276540-43-2), a certified reference material (molecular formula C13H14N2O3, MW 246.26 g/mol) for analytical method development and quality control.
Structurally, methyl 3-(2-methoxy-5-methylphenyl)-1H-pyrazole-5-carboxylate (C13H14N2O3) contains a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 8.0, corresponding to approximately 8 ring(s) or double-bond equivalent(s). With a molecular weight of 246.26 g/mol, it falls into the medium-molecular-weight range. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
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.
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 | C13H14N2O3 |
| Molecular Weight | 246.26 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.) | 1990 |
| Nitrogen Atoms | 2 |
Related methyl Standards
- 5-(4-Methoxy-3,5-dimethylphenyl)-1H-pyrazole-3-carboxylic acid (CAS 1038912-36-5)
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Recommended Standards
- 5-(4-Isopropoxyphenyl)furan-2-carboxylic acid (CAS 1275731-63-9)
- (7-Methyl-2,3-dihydrofuro[3,4-b][1,4]dioxin-5-yl)(phenyl)methanol (CAS 1281795-87-6)
- Methyl 1,4-dimethoxy-2-naphthoate (CAS 127536-35-0)
- 3-[4-(4-fluorophenyl)-1,3-thiazol-2-yl]-4h-1,2,4-triazole (CAS 1283571-91-4)
- 2-(1,2,4-Oxadiazol-3-yl)propan-2-amine hydrochloride (CAS 1415898-91-7)
- 2-Cyclopropoxy-1-ethyl-4-fluorobenzene (CAS 1243358-07-7)
- 8-Methyl-3-phenyl-8-azabicyclo[3.2.1]Octan-3-ol (CAS 23869-15-0)
- 2-(Naphthalen-2-yl)pyrrolidine (CAS 100710-37-0)
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Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
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- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com