3-Methyl-4-[(phenylamino)methylidene]-4,5-dihydro-1H-pyrazol-5-one CAS 81905-05-7
Purity 97%+In StockPharmaceutical Standards
| CAS No. | 81905-05-7 |
| Molecular Formula | C11H11N3O |
| Molecular Weight | 201.22 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
3-Methyl-4-[(phenylamino)methylidene]-4,5-dihydro-1H-pyrazol-5-one (CAS 81905-05-7) is a high-purity pharmaceutical standards reference standard from CATO, an ISO 17034 accredited reference material producer. Molecular formula: C11H11N3O. Molecular weight: 201.22 g/mol. Each batch is supplied with a Certificate of Analysis (COA).
Physical & Chemical Properties
| Molecular Formula | C11H11N3O |
| Molecular Weight | 201.22 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1980 |
| Nitrogen Atoms | 3 |
Related Methyl Standards
- (2-(Phenylamino)pyrimidin-5-yl)methanol (CAS 864172-94-1)
- 4-Methyl-2-(phenylamino)pyrimidin-5-ol (CAS 98456-06-5)
- 4-Methyl-6-(phenylamino)pyrimidin-5-ol (CAS 61766-77-6)
- 6-Methyl-2-(phenylamino)pyrimidin-4(3H)-one (CAS 50427-08-2)
- 2-(Phenylamino)ethanesulfonic acid (CAS 58928-14-6)
- 1-(Phenylamino)cyclohexane-1-carbonitrile (CAS 64269-06-3)
- (6-(Phenylamino)pyridin-3-yl)methanol (CAS 161370-12-3)
- (2-(Phenylamino)pyridin-3-yl)methanol (CAS 21093-54-9)
Recommended Standards
- 3-Methyl-4-(pyrimidin-5-yloxy)aniline (CAS 871020-40-5)
- 3-Methyl-5H-spiro[furan-2,3'-indolin]-2'-one (CAS 882041-51-2)
- 3-Methyl-4-(pyridazin-3-yloxy)aniline (CAS 871020-44-9)
- 3-Hydroxy-2-methylbutanenitrile (CAS 38046-46-7)
- 1-[6-(Methylsulfanyl)-1-phenyl-1H-pyrazolo[3,4-d]pyrimidin-4-yl]pyrrolidine (CAS 339106-41-1)
- Ethyl 5,7-dimethyl-2-(methylthio)pyrazolo[1,5-a]pyrimidine-3-carboxylate (CAS 169268-39-7)
- 5-fluorothiophene-2-carboxylic acid (CAS 4377-58-6)
- 1-Chloro-2-(4-fluorophenoxy)benzene (CAS 207741-06-8)
- 4-Hydroxy-1-methyl-7-phenoxyquinolin-2(1H)-one (CAS 2243810-16-2)
- Peptide 439 (CAS CATO-CPTD788439)
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 13829788188 / jacky.chen@cato-chem.com