1-methyl-3,5-diphenyl-4,5-dihydro-1H-pyrazole CAS 19268-74-7
| CAS No. | 19268-74-7 |
| Molecular Formula | C16H16N2 |
| Molecular Weight | 236.31 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including 1-methyl-3,5-diphenyl-4,5-dihydro-1H-pyrazole.
1-methyl-3,5-diphenyl-4,5-dihydro-1H-pyrazole (CAS 19268-74-7), molecular formula C16H16N2 and molecular weight 236.31 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to a nitrogen-containing heterocyclic scaffold, a nitrile group, 1-methyl-3,5-diphenyl-4,5-dihydro-1H-pyrazole is typically pale yellow to yellow low-melting solid. Its solid-state physicochemical attributes — including a molecular weight of 236.31 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.
CATO manufactures 1-methyl-3,5-diphenyl-4,5-dihydro-1H-pyrazole under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C16H16N2 |
| Molecular Weight | 236.31 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) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1962 |
| Nitrogen Atoms | 2 |
Related methyl Standards
- 2-Methyl-2,4-diphenyl-2,5-dihydrofuran (CAS 57279-08-0)
- 3-Methyl-1,5-diphenyl-4,5-dihydro-1H-pyrazole (CAS 2515-46-0)
- 1,3-Diphenyl-1H-pyrazol-5-ol (CAS 114138-49-7)
- 1,3-Diphenyl-1H-pyrazol-4-ol (CAS 1202029-92-2)
- 1,5-Diphenyl-1H-pyrazol-3(2H)-one (CAS 13370-06-4)
- 1,3-Diphenyl-1H-pyrazol-5(4H)-one (CAS 4845-49-2)
- 1,4-Diphenyl-1H-1,2,3-triazol-5-amine (CAS 29704-63-0)
- 2,4-Diphenyl-1,2-dihydro-3H-pyrazol-3-one (CAS 400075-06-1)
Recommended Standards
- 191871-91-7 Carbamic acid, [[4-(aminomethyl)phenyl]methyl]methyl-, 1,1-dimethylethyl ester (9CI) (CAS 191871-91-7)
- 2-(3,5-Dimethylphenyl)-1H-indol-5-amine (CAS 193016-95-4)
- tert-butyl N-[(3-amino-5-methylphenyl)methyl]carbamate (CAS 1909319-84-1)
- Tert-butyl 1-cyano-6-azaspiro[3.4]Octane-6-carboxylate (CAS 1934526-49-4)
- 3-Ethynyl-1-methylpyrrolidin-3-ol (CAS 1451085-44-1)
- 2-((5-Benzyl-4-phenyl-4H-1,2,4-triazol-3-yl)thio)-N-(2,3-dimethylphenyl)acetamide (CAS 332907-32-1)
- 5-[(2-bromo-4-methoxyphenyl)methylidene]-2,2-dimethyl-1,3-dioxane-4,6-dione (CAS 1989659-18-8)
- 2-(Methylthio)-1-phenyl-1H-[1,2,4]triazolo[1,5-c]quinazolin-4-ium iodide (CAS 62495-55-0)
- 6-(Benzylthio)-5-methylnicotinaldehyde (CAS 1355204-08-8)
- Tetravinyl tin (CAS 1112-56-7)
- N-[(4-Chlorophenyl)(Difluoro)Methyl]Cyclopropanamine (CAS 60010-38-0)
- (R)-1-(3-((2-Aminoethyl)(ethyl)amino)piperidin-1-yl)ethanone (CAS 1354000-28-4)
- Fulvestrant impurity 56 (CAS CATO-C4X-191756)
- Neuropeptide Y (13-36) (human, rat) (CAS 122341-40-6)
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