3-Ethyl-5-methyl-[1,2,4]triazolo[4,3-a]pyridine CAS 4919-18-0
| CAS No. | 4919-18-0 |
| Molecular Formula | C9H11N3 |
| Molecular Weight | 161.20 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 161.20 g/mol gives 3-Ethyl-5-methyl-[1,2,4]triazolo[4,3-a]pyridine distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
3-Ethyl-5-methyl-[1,2,4]triazolo[4,3-a]pyridine (CAS 4919-18-0) is a high-purity analytical reference standard with the molecular formula C9H11N3 and a molecular weight of 161.20 g/mol.
Based on its molecular formula C9H11N3, 3-Ethyl-5-methyl-[1,2,4]triazolo[4,3-a]pyridine contains a nitrogen-containing heterocyclic scaffold, a nitrile group; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 161.20 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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 3-Ethyl-5-methyl-[1,2,4]triazolo[4,3-a]pyridine 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 | C9H11N3 |
| Molecular Weight | 161.20 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) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1958 |
| Nitrogen Atoms | 3 |
Recommended Standards
- 3-Ethyl-4-hydroxy-5-methylbenzonitrile (CAS 4909-95-9)
- 3-Ethyl-6-methyl-[1,2,4]triazolo[4,3-a]pyridine (CAS 4919-19-1)
- 3-Ethyl-4-(hydroxymethyl)benzonitrile (CAS 202522-03-0)
- 3-Ethyl-6-methylbenzo[c]isoxazole (CAS 64723-52-0)
- 5-Amino-1-(3-fluoro-2-methoxyphenyl)-3-methyl-1H-pyrazole-4-carbonitrile (CAS 2197055-50-6)
- 3-(3,3-dimethylbutanoyl)-1,3-thiazolidine-4-carboxylic acid (CAS 1103859-83-1)
- Dehydroglaucine (CAS 22212-26-6)
- 1-(2-Oxo-2-phenylethyl)quinazolin-4(1H)-one (CAS 60007-49-0)
- 3-methyl-3-(4-methylphenyl)pyrrolidine-2,5-dione (CAS 88612-24-2)
- 4-Amino-1-(2-hydroxyethyl)-1h-pyrazole-3-carboxylic acid (CAS 1427022-02-3)
- 3-Chloro-7-(piperidin-1-yl)quinoline-8-carbonitrile (CAS 88347-08-4)
- N-(4-phenylthiazol-2-yl)-2-(m-tolylthio)acetamide (CAS 338957-85-0)
- (S)-N-(3-Chlorobenzyl)-N-isopropylpyrrolidin-3-amine (CAS 820979-40-6)
- Fibrinogen-Binding Inhibitor Peptide (CAS 89105-94-2)
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