5,6,7,8-Tetrahydro-[1,2,4]triazolo[4,3-a]pyrazine oxalate CAS 1187932-94-0
| CAS No. | 1187932-94-0 |
| Molecular Formula | C5H8N4 |
| Molecular Weight | N/A |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
5,6,7,8-Tetrahydro-[1,2,4]triazolo[4,3-a]pyrazine oxalate (CAS 1187932-94-0), molecular formula C5H8N4C2H2O4 and molecular weight 214.18 g/mol, is a CATO reference standard with documented purity and traceability.
Structurally, 5,6,7,8-Tetrahydro-[1,2,4]triazolo[4,3-a]pyrazine oxalate (C5H8N4C2H2O4) contains an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 5.0, corresponding to approximately 5 ring(s) or double-bond equivalent(s). With a molecular weight of 214.18 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.
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 | C5H8N4 C2H2O4 |
| Molecular Weight | 214.18 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, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO, water |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1989 |
| Nitrogen Atoms | 4 |
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Recommended Standards
- 4-(Thiophen-2-yl)pyrrolidine-3-carboxylic acid (CAS 1047655-24-2)
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- 6-Hydroxy-2H-benzo[b][1,4]thiazin-3(4H)-one (CAS 91375-74-5)
- 5-Methoxy-4-oxo-1,4-dihydropyridine-2-carboxylic acid (CAS 103878-37-1)
- 5-Cyanothiophene-3-sulfonamide (CAS 2657625-52-8)
- 4-Chloro-2-((cyclopentylamino)methyl)phenol (CAS 827329-02-2)
- 3-[(2,6-dichlorophenoxy)methyl]-4-methoxybenzaldehyde (CAS 832737-35-6)
- trans-3-Amino-1-methylcyclobutanol hydrochloride (CAS 1523571-03-0)
- 2-Chloro-n'-(diphenylmethylidene)acetohydrazide (CAS 29043-58-1)
- Semaglutide impurity 87 (CAS CATO-C4X-222687)
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