Tert-butyl (2S,5R)-2-ethyl-5-methylpiperazine-1-carboxylate oxalate CAS 1161771-91-0
| CAS No. | 1161771-91-0 |
| Molecular Formula | C12H24N2O2 |
| Molecular Weight | N/A |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Owing to an amide group, a carboxylic acid group, a hydroxyl group, an ether linkage, Tert-butyl (2S,5R)-2-ethyl-5-methylpiperazine-1-carboxylate oxalate is typically white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 318.37 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
Tert-butyl (2S,5R)-2-ethyl-5-methylpiperazine-1-carboxylate oxalate (CAS 1161771-91-0), molecular formula C12H24N2O2C2H2O4 and molecular weight 318.37 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 | C12H24N2O2 C2H2O4 |
| Molecular Weight | 318.37 g/mol |
| Appearance | White to pale 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) | 3.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1989 |
| Nitrogen Atoms | 2 |
Recommended Standards
- 1-(4-(3-Chloro-5-(trifluoromethyl)pyridin-2-yl)piperazin-1-yl)-2-((4-chlorophenyl)thio)propan-1-one (CAS 634155-05-8)
- 2-(4-Fluorophenyl)-N-((1-(4-fluorophenyl)-1H-tetrazol-5-yl)methyl)acetamide (CAS 897623-62-0)
- n-(Tert-pentyl)tetrazolo[1,5-b]pyridazin-6-amine (CAS 1088177-65-4)
- 3-(4-Methoxyphenyl)-4-methyl-1H-pyrazole-5-carboxylic acid (CAS 1234342-93-8)
- Methyl 2-(4-hydroxyphenyl)-2-methylpropanoate (CAS 123342-40-5)
- (E)-octadec-2-en-1-ol (CAS 41207-34-5)
- N,3-Dimethyl-6-phenylisoxazolo[5,4-b]pyridin-4-amine (CAS 61658-67-1)
- 3-Methyl-4-nitrobenzene-1-sulfonamide (CAS 1250435-32-5)
- Ethyl 1,1,7,7-tetramethyl-11-oxo-2,3,5,6,7,11-hexahydro-1H-pyrano[2,3-f]pyrido[3,2,1-ij]quinoline-10-carboxylate (CAS 113869-06-0)
- D-Ala28-Tirzepatide (CAS CATO-CPTD788906)
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