Ac-muramyl-D-Ala-D-Glu-NH? CAS 56816-18-3
| CAS No. | 56816-18-3 |
| Molecular Formula | C19H32N4O11 |
| Molecular Weight | 492.48 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 492.48 g/mol gives Ac-muramyl-D-Ala-D-Glu-NH? distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
Ac-muramyl-D-Ala-D-Glu-NH? (CAS 56816-18-3) is a high-purity analytical reference standard with the molecular formula C19H32N4O11 and a molecular weight of 492.48 g/mol.
Based on its molecular formula C19H32N4O11, Ac-muramyl-D-Ala-D-Glu-NH? contains a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 492.48 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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 | C19H32N4O11 |
| Molecular Weight | 492.48 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | >95% |
| Storage | Store in a cool place (≤25°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) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1973 |
| Nitrogen Atoms | 4 |
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