5-Methyl-1-phenyl-1,2-dihydro-3H-1,2,4-triazol-3-one CAS 37039-02-4
| CAS No. | 37039-02-4 |
| Molecular Formula | C9H9N3O |
| Molecular Weight | 175.19 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The molecular framework of 5-Methyl-1-phenyl-1,2-dihydro-3H-1,2,4-triazol-3-one (C9H9N3O) is characterized by a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
5-Methyl-1-phenyl-1,2-dihydro-3H-1,2,4-triazol-3-one (CAS 37039-02-4), molecular formula C9H9N3O and molecular weight 175.19 g/mol, is a CATO reference standard with documented purity and traceability.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
As a certified reference material (CRM), 5-Methyl-1-phenyl-1,2-dihydro-3H-1,2,4-triazol-3-one 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.
Physical & Chemical Properties
| Molecular Formula | C9H9N3O |
| Molecular Weight | 175.19 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (faint amine-like odor) |
| 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) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1967 |
| Nitrogen Atoms | 3 |
Recommended Standards
- 5-Methoxyquinoxalin-2-amine (CAS 659729-75-6)
- 5-Methyl-2-(pyridin-2-yl)-1H-pyrazol-3(2H)-one (CAS 3670-51-7)
- 5-Methoxyquinazolin-4-amine (CAS 885277-54-3)
- 5-Methyl-2-phenyl-2,4-dihydro-3H-1,2,4-triazol-3-one (CAS 22863-24-7)
- 1-(2-Cyanophenyl)-N-phenylmethanesulfonamide (CAS 27350-15-8)
- Ethyl 4,7-dichloro-2-methylquinoline-3-carboxylate (CAS 50593-27-6)
- 5-Oxooctanoic acid (CAS 3637-14-7)
- Methylnaltrexone Bromide Impurity 9 (CAS CATO-C4X-15219)
- 2-(4-Amino-1,2,5-oxadiazol-3-yl)acetaldehyde (CAS 162330-58-7)
- Fulvestrant impurity 48 (CAS CATO-C4X-191748)
- Mometasone Furoate EP Impurity T (CAS CATO-C4X-170420)
- Ethyl 4-amino-5,6-dichloronicotinate (CAS 919354-11-3)
- N-(4-Methyl-1,3-thiazol-2-yl)-1-phenylcyclopentane-1-carboxamide (CAS 1024342-91-3)
- C-Peptide 1 (rat) (CAS 41475-27-8)
Why CATO?
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