trans-(6R,7S)-7-Amino-6-methyl-8-oxo-2-oxa-1-azabicyclo[4.2.0]oct-4-ene-5-carboxylic acid CAS 72257-78-4
| CAS No. | 72257-78-4 |
| Molecular Formula | C8H10N2O4 |
| Molecular Weight | 198.18 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
trans-(6R,7S)-7-Amino-6-methyl-8-oxo-2-oxa-1-azabicyclo[4.2.0]oct-4-ene-5-carboxylic acid (CAS 72257-78-4), molecular formula C8H10N2O4 and molecular weight 198.18 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage, trans-(6R,7S)-7-Amino-6-methyl-8-oxo-2-oxa-1-azabicyclo[4.2.0]oct-4-ene-5-carboxylic acid is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 198.18 g/mol — guide the selection of appropriate sample preparation and analytical techniques. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
As a certified reference material (CRM), trans-(6R,7S)-7-Amino-6-methyl-8-oxo-2-oxa-1-azabicyclo[4.2.0]oct-4-ene-5-carboxylic acid 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 | C8H10N2O4 |
| Molecular Weight | 198.18 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 |
| 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.) | 1977 |
| Nitrogen Atoms | 2 |
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