1,1,1,9,9,9-Hexamethyl-3,5,7-trioctyl-3,5,7-tris((trimethylsilyl)oxy)pentasiloxane CAS 187593-69-7
| CAS No. | 187593-69-7 |
| Molecular Formula | C17H44O3Si4 |
| Molecular Weight | 408.87 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), 1,1,1,9,9,9-Hexamethyl-3,5,7-trioctyl-3,5,7-tris((trimethylsilyl)oxy)pentasiloxane 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.
1,1,1,9,9,9-Hexamethyl-3,5,7-trioctyl-3,5,7-tris((trimethylsilyl)oxy)pentasiloxane (CAS 187593-69-7), molecular formula C17H44O3Si4 and molecular weight 408.87 g/mol, is a CATO reference standard with documented purity and traceability.
The molecular framework of 1,1,1,9,9,9-Hexamethyl-3,5,7-trioctyl-3,5,7-tris((trimethylsilyl)oxy)pentasiloxane (C17H44O3Si4) is characterized by a carboxylic acid group, a hydroxyl group, an ether linkage. In reversed-phase chromatography, its retention is governed primarily by its high hydrophobicity (logP), which provides a practical basis for HPLC-UV/DAD or LC-MS method development. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C17H44O3Si4 |
| Molecular Weight | 408.87 g/mol |
| Purity | 97%+ |
| Storage | Store at room temperature, keep sealed and dry |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | Stable under recommended storage conditions |
| Degree of Unsaturation (DBE) | -4.0 |
| CAS Registry Year (est.) | 2010 |
Related Hexamethyl Standards
- 1,1,1,5,5,5-Hexamethyl-3-octyl-3-((trimethylsilyl)oxy)trisiloxane (CAS 187592-85-4)
- 3-(1,1,1,5,5,5-Hexamethyl-3-((trimethylsilyl)oxy)trisiloxan-3-yl)propyl acrylate (CAS 17096-12-7)
- N-(3-(1,1,1,5,5,5-Hexamethyl-3-((trimethylsilyl)oxy)trisiloxan-3-yl)propyl)acrylamide (CAS 115258-10-1)
- 1,1,1,5,5,5-Hexamethyl-3-phenethyl-3-((trimethylsilyl)oxy)trisiloxane (CAS 211935-21-6)
- 2,2,4,4,6,6-Hexamethyl-8,8-diphenyl-1,3,5,7,2,4,6,8-tetraoxatetrasilocane (CAS 1693-44-3)
- N-(3-(1,1,1,5,5,5-Hexamethyl-3-((trimethylsilyl)oxy)trisiloxan-3-yl)propyl)methacrylamide (CAS 115257-95-9)
- Hexamethyl benzene-1,2,3,4,5,6-hexacarboxylate (CAS 6237-59-8)
- 1,1,1,5,5,5-Hexamethyl-3-phenyl-3-(trimethylsilyloxy)trisiloxane (CAS 2116-84-9)
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