37-Desmethylene 24,33-Bis-O-(tert-butyldimethylsilyl)-37-oxo-FK-506 CAS 155684-96-1
| CAS No. | 155684-96-1 |
| Molecular Formula | C56H97NO12Si2 |
| Molecular Weight | 1032.54 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.
37-Desmethylene 24,33-Bis-O-(tert-butyldimethylsilyl)-37-oxo-FK-506 (CAS 155684-96-1), molecular formula C56H97NO12Si2 and molecular weight 1032.54 g/mol, is a CATO reference standard with documented purity and traceability.
37-Desmethylene 24,33-Bis-O-(tert-butyldimethylsilyl)-37-oxo-FK-506 (C56H97NO12Si2) contains a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage. The carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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 | C56H97NO12Si2 |
| Molecular Weight | 1032.54 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.) | 2001 |
| Nitrogen Atoms | 1 |
Related Desmethylene Standards
Recommended Standards
- Lys-[Des-Arg9]-Bradykinin (CAS 71800-36-7)
- Tacrolimus Impurity 28 (CAS 133941-75-0)
- (Val5)-Angiotensin II (CAS 58-49-1)
- (SP-4-1)-[1,8,15,22-Tetrakis[2-methyl-1-(1-methylethyl)propoxy]-29H,31H-phthalocyaninato-N29,N30,N31,N32]coppe (CAS 144843-25-4)
- 1,3-Di-tert-butyl-1,1,3,3-tetramethyldisiloxane (CAS 67875-55-2)
- (Propan-2-yl)[(pyridin-2-yl)methyl]amine hydrochloride (CAS 1158567-11-3)
- 4-Tert-butyl-2-phenyl-1,3-thiazol-5-amine (CAS 1247165-74-7)
- (4,5-Bis(benzyloxy)pyridin-2-yl)methanol (CAS 112334-43-7)
- 5-Bromo-2-cyclobutylthiazole (CAS 1086382-50-4)
- 4-Methyl-1H-pyrrolo[3,2-c]pyridin-2(3H)-one (CAS 1190314-02-3)
- Tirzepatide Impurity 45 (CAS CATO-C4X-324045)
- 3-Methyl-4-(ethoxycarbonyl)phenylboronic acid (CAS 2121511-23-5)
- 2H-1,2,3-Triazole-4,5-dicarboxylic acid (CAS 294853-04-6)
- [y-Glu15]-Semaglutide Impurity 134 (CAS CATO-C4X-2226134)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com