Levothyroxine EP Impurity F CAS 911661-90-0
Purity >90%In StockPharmacopoeial Impurity Standards
| CAS No. | 911661-90-0 |
| Molecular Formula | C21H13I6NO5 |
| Molecular Weight | 1120.76 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies Levothyroxine EP Impurity F (CAS 911661-90-0), a pharmacopoeial impurity standards reference standard manufactured under ISO 17034 accreditation. Molecular formula: C21H13I6NO5. Molecular weight: 1120.76 g/mol. Batch-specific COA and technical support are available on request.
Physical & Chemical Properties
| Molecular Formula | C21H13I6NO5 |
| Molecular Weight | 1120.76 g/mol |
| Purity | >90% |
| 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; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 13.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1987 |
| Halogen Content | I-containing |
| Nitrogen Atoms | 1 |
Related Levothyroxine Standards
- Levothyroxine Impurity 11 (CAS CATO-C4X-167811)
- Levothyroxine acyl glucuronide (CAS 909880-81-5)
- Levothyroxine phenolic glucuronide (CAS 21462-56-6)
- Levothyroxine Impurity 57 (CAS CATO-C4X-167857)
- Levothyroxine Impurity 58 (CAS CATO-C4X-167858)
- Levothyroxine Impurity 29（Mixture of Diastereomers） (CAS CATO-C4X-167829)
- Levothyroxine Impurity 50 (CAS CATO-C4X-167850)
- Levothyroxine Impurity 51 (CAS CATO-C4X-167851)
Recommended Standards
- GRP (18-27) (human, porcine, canine) (CAS 81608-30-2)
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- Carfilzomib Impurity 38 (Mixture of Diastereomers) (CAS CATO-C4X-102238)
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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