Fulvestrant Impurity 21 CAS 261506-24-5
Purity >95%In StockPharmacopoeial Impurity Standards
| CAS No. | 261506-24-5 |
| Molecular Formula | C34H49F5O4S |
| Molecular Weight | 648.81 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Fulvestrant Impurity 21 (CAS 261506-24-5) reference standard, produced by CATO (ISO 17034 / CNAS / ANAB accredited). Molecular formula: C34H49F5O4S. Molecular weight: 648.81 g/mol. Trusted by 10,000+ laboratories worldwide for pharmaceutical analysis and QC.
Physical & Chemical Properties
| Molecular Formula | C34H49F5O4S |
| Molecular Weight | 648.81 g/mol |
| Purity | >95% |
| Storage | Store at room temperature, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2025 |
| Halogen Content | F-containing |
| Sulfur Atoms | 1 |
Related Fulvestrant Standards
- Fulvestrant Impurity 29 (CAS CATO-C4X-191729)
- Fulvestrant Impurity 60 (CAS 875573-69-6)
- Fulvestrant Impurity 30 (CAS CATO-C4X-191730)
- Fulvestrant impurity 35 (CAS CATO-C4X-191735)
- Fulvestrant EP Impurity D (CAS 2483797-59-5)
- Fulvestrant impurity 55 (CAS CATO-C4X-191755)
- Fulvestrant EP Impurity B (CAS 98008-06-1)
- Fulvestrant EP Impurity B (CAS CATO-C4X-191733)
Recommended Standards
- Glutathione Impurity 14 (CAS CATO-C4X-118514)
- Brexpiprazole Impurity 75 (CAS CATO-C4X-113175)
- Quinovic acid 3-O-β-D-glucoside (CAS 79955-41-2)
- Hydrochlorothiazide EP Impurity B (CAS 121-30-2)
- Remdesivir Impurity 42 (CAS 1191237-66-7)
- tert-Butyl (naphthalen-1-ylmethylene)carbamate (CAS 479423-44-4)
- 6,7-Dihydro-5H-pyrrolo[1,2-a]imidazole (CAS 59646-16-1)
- K4H0YVF8J4 5818-15-5 Propionylhydrazide Propanoic acid, hydrazide (9CI) Propionic acid, hydrazide Propionohydrazide 3-02-00-00551 (Beilstein Handbook Reference) BRN 0506227 EINECS 227-390-7 NSC 28448 Propanoic hydrazide Propiohydrazide Propionsaeurehydrazid [German] Propionsaeurehydrazid UNII-K4H0YVF8J4 (CAS 5818-15-5)
- 2-(2-bromoethoxy)ethanamine (CAS 471910-67-5)
- Liraglutide Impurity 22 (CAS 536721-25-2)
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 13829788188 / jacky.chen@cato-chem.com