22-Hydroxy-33-tert-butyldimethylsilyloxy-iso-FK-506 CAS 134556-79-9
| CAS No. | 134556-79-9 |
| Molecular Formula | C50H85NO12Si |
| Molecular Weight | 920.29 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 920.29 g/mol gives 22-Hydroxy-33-tert-butyldimethylsilyloxy-iso-FK-506 distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
22-Hydroxy-33-tert-butyldimethylsilyloxy-iso-FK-506 (CAS 134556-79-9), molecular formula C50H85NO12Si and molecular weight 920.29 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C50H85NO12Si, 22-Hydroxy-33-tert-butyldimethylsilyloxy-iso-FK-506 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 920.29 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.
As a certified reference material (CRM), 22-Hydroxy-33-tert-butyldimethylsilyloxy-iso-FK-506 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 | C50H85NO12Si |
| Molecular Weight | 920.29 g/mol |
| Purity | 97%+ |
| Storage | Store at room temperature, 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) | 9.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1995 |
| Nitrogen Atoms | 1 |
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