Methyl 1-ethyl-3-methyl-6-(p-tolyl)-1h-pyrazolo[3,4-b]pyridine-4-carboxylate CAS 832742-47-9
| CAS No. | 832742-47-9 |
| Molecular Formula | C18H19N3O2 |
| Molecular Weight | 309.36 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
Methyl 1-ethyl-3-methyl-6-(p-tolyl)-1h-pyrazolo[3,4-b]pyridine-4-carboxylate (CAS 832742-47-9), molecular formula C18H19N3O2 and molecular weight 309.36 g/mol, is a CATO reference standard with documented purity and traceability.
Methyl 1-ethyl-3-methyl-6-(p-tolyl)-1h-pyrazolo[3,4-b]pyridine-4-carboxylate (C18H19N3O2) contains a steroid core, an amide group, a hydroxyl group, an ether linkage. It is notably hygroscopic, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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 | C18H19N3O2 |
| Molecular Weight | 309.36 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) | 11.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1986 |
| Nitrogen Atoms | 3 |
Recommended Standards
- Gefitinib Impurity N2 (CAS 246512-44-7)
- Methyl O-benzyl-N-(tert-butoxycarbonyl)-L-serinate (CAS 67389-46-2)
- Ethyl 5-cyano-2-phenyl-6-(propylamino)nicotinate (CAS 477865-83-1)
- ML-098 (CAS 878978-76-8)
- 2-(2-Methoxyphenyl)-1-morpholinoethane-1-thione (CAS 42945-81-3)
- 6-Pyridin-3-yl-2H-pyridazin-3-one (CAS 78784-65-3)
- (2R,3R,4R,5R,6R)-6-(hydroxymethyl)-3-((4-methoxybenzylidene)amino)tetrahydro-2H-pyran-2,4,5-triol (CAS 233595-32-9)
- 7-Oxabicyclo[2.2.1]Hept-5-en-2-amine hydrochloride (CAS 1314913-63-7)
- 1-Benzyl-3-hydroxypiperidine-3-carbonitrile (CAS 150018-99-8)
- 2-Hydroxy-5-(methylcarbamoyl)benzoic acid (CAS 1243280-47-8)
- (E)-3-(benzo[d][1,3]dioxol-5-yl)-N-(3-chloro-4-methylphenyl)acrylamide (CAS 298215-59-5)
- Ethyl 4-(2,6-difluorophenyl)-3-oxobutanoate (CAS 221121-46-6)
- Methyl 4-ethyl-2-isothiocyanato-5-methylthiophene-3-carboxylate (CAS 588695-55-0)
- C-telopeptide (CAS 162929-64-8)
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