Ethyl 1-phenyl-1H-1,2,4-triazole-3-carboxylate CAS 1019-95-0
| CAS No. | 1019-95-0 |
| Molecular Formula | C11H11N3O2 |
| Molecular Weight | 217.22 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Structurally, Ethyl 1-phenyl-1H-1,2,4-triazole-3-carboxylate (C11H11N3O2) contains an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 8.0, corresponding to approximately 8 ring(s) or double-bond equivalent(s). With a molecular weight of 217.22 g/mol, it falls into the medium-molecular-weight range. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
Ethyl 1-phenyl-1H-1,2,4-triazole-3-carboxylate (CAS 1019-95-0), molecular formula C11H11N3O2 and molecular weight 217.22 g/mol, is a CATO reference standard with documented purity and traceability.
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.
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 | C11H11N3O2 |
| Molecular Weight | 217.22 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) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1957 |
| Nitrogen Atoms | 3 |
Recommended Standards
- Methyl 5-(m-Tolyl)isoxazole-3-carboxylate (CAS 1018680-78-8)
- 3-((1H-1,2,4-triazol-1-yl)methyl)-4-methoxybenzaldehyde (CAS 1019111-16-0)
- [5-(4-Methylphenyl)isoxazol-3-yl]acetic acid (CAS 1018663-09-6)
- N-(FUran-2-ylmethyl)-4-hydroxybenzamide (CAS 1019363-01-9)
- 1-(3,4,5-Tribromothiophen-2-yl)ethanol (CAS 1707667-46-6)
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- 2-(5-(3,4-Dichlorophenyl)-4-iodo-1H-pyrazol-1-yl)ethanol (CAS 1708259-98-6)
- 6-Amino-1H-indol-4-ol (CAS 885520-39-8)
- 1-(4-(2-Fluorobenzyl)-3-oxo-3,4-dihydropyrazin-2-yl)piperidine-3-carboxylic acid (CAS 1707603-29-9)
- Ethyl 2-(2-oxo-1,2-dihydro-3H-indol-3-ylidene)acetate (CAS 910035-64-2)
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- 5-(4-(Hydroxymethyl)phenyl)furan-2-carbonitrile (CAS 906665-08-5)
- 4-(2,4-Di-tert-pentylphenoxy)butan-1-amine (CAS 51959-14-9)
- Hexapeptide-9 (CAS 885024-94-2)
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