Octadecamethylnonasiloxane CAS 556-71-8
Purity >95%In StockPharmaceutical Standards
| CAS No. | 556-71-8 |
| Molecular Formula | C18H54O9Si9 |
| Molecular Weight | 667.39 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Octadecamethylnonasiloxane (CAS 556-71-8) is a high-purity pharmaceutical standards reference standard from CATO, an ISO 17034 accredited reference material producer. Molecular formula: C18H54O9Si9. Molecular weight: 667.39 g/mol. Each batch is supplied with a Certificate of Analysis (COA).
Physical & Chemical Properties
| Molecular Formula | C18H54O9Si9 |
| Molecular Weight | 667.39 g/mol |
| Purity | >95% |
| Storage | Store at room temperature, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | Stable under recommended storage conditions |
| Degree of Unsaturation (DBE) | -8.0 |
| CAS Registry Year (est.) | 1957 |
Recommended Standards
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- Ethyl 5-bromo-1,4-dimethyl-1H-pyrazole-3-carboxylate (CAS 1707370-05-5)
- 2-(Difluoromethyl)isonicotinaldehyde (CAS 1211540-67-8)
- 5,10-Dihydroxy-2,7-dimethylpyrimido[4,5-g]quinazoline-4,9(1H,6H)-dione (CAS 115705-62-9)
- 3-[(2-Bromo-4-methylphenoxy)methyl]pyrrolidinehydrochloride (CAS 1219980-99-0)
- Ethyl 2-(isoxazol-5-yl)acetate (CAS 82669-58-7)
- Human IgE Pentapeptide HEPP (CAS 62087-72-3)
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