[Ac-Cys4,DPhe7,Cys10] a-MSH (4-13), amide CAS 91050-39-4
| CAS No. | 91050-39-4 |
| Molecular Formula | C61H86N18O13S2 |
| Molecular Weight | 1343.60 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
[Ac-Cys4,DPhe7,Cys10] a-MSH (4-13), amide (C61H86N18O13S2) contains a nitrogen-containing heterocyclic scaffold, an amide group, a sulfone group, a hydroxyl group, an ether linkage. It is notably hygroscopic, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. 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).
[Ac-Cys4,DPhe7,Cys10] a-MSH (4-13), amide (CAS 91050-39-4), molecular formula C61H86N18O13S2 and molecular weight 1343.60 g/mol, is a CATO reference standard with documented purity and traceability.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
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 | C61H86N18O13S2 |
| Molecular Weight | 1343.60 g/mol |
| Purity | 97%+ |
| 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) | 28.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1983 |
| Nitrogen Atoms | 18 |
| Sulfur Atoms | 2 |
Recommended Standards
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- Semaglutide impurity 93 (CAS CATO-C4X-222693)
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