Fmoc-Met(O)-OH CAS 76265-70-8
| CAS No. | 76265-70-8 |
| Molecular Formula | C20H21NO5S |
| Molecular Weight | 387.45 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
Fmoc-Met(O)-OH (CAS 76265-70-8), molecular formula C20H21NO5S and molecular weight 387.45 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C20H21NO5S, Fmoc-Met(O)-OH contains a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 387.45 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C20H21NO5S |
| Molecular Weight | 387.45 g/mol |
| Purity | >95% |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 11.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1978 |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Related Fmoc Standards
- Fmoc-D-Met(O)-OH (CAS 2410250-48-3)
- Fmoc-Cys(2-hydroxyethyl)-OH (CAS 200354-35-4)
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- Fmoc-DL-Phe-OH (CAS 126727-04-6)
- Fmoc-(4-aminomethylphenyl)acetic acid (CAS 176504-01-1)
- Fmoc-(3-aminomethylphenyl)acetic acid (CAS 631915-50-9)
- Fmoc-(r)-3-amino-3-phenylpropionic acid (CAS 220498-02-2)
- Fmoc-(R,S)-3-amino-2-phenylpropionic acid (CAS 683217-60-9)
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