1,1,1,5,5,5-Hexamethyl-3-phenethyl-3-((trimethylsilyl)oxy)trisiloxane CAS 211935-21-6
| CAS No. | 211935-21-6 |
| Molecular Formula | C17H36O3Si4 |
| Molecular Weight | 400.81 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
CATO manufactures 1,1,1,5,5,5-Hexamethyl-3-phenethyl-3-((trimethylsilyl)oxy)trisiloxane under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
1,1,1,5,5,5-Hexamethyl-3-phenethyl-3-((trimethylsilyl)oxy)trisiloxane (CAS 211935-21-6) is a high-purity analytical reference standard with the molecular formula C17H36O3Si4 and a molecular weight of 400.81 g/mol.
Owing to a carboxylic acid group, a hydroxyl group, an ether linkage, 1,1,1,5,5,5-Hexamethyl-3-phenethyl-3-((trimethylsilyl)oxy)trisiloxane is typically white to off-white crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 400.81 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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 | C17H36O3Si4 |
| Molecular Weight | 400.81 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) | 0.0 |
| CAS Registry Year (est.) | 2017 |
Related Hexamethyl Standards
- N-(3-(1,1,1,5,5,5-Hexamethyl-3-((trimethylsilyl)oxy)trisiloxan-3-yl)propyl)acrylamide (CAS 115258-10-1)
- 3-(1,1,1,5,5,5-Hexamethyl-3-((trimethylsilyl)oxy)trisiloxan-3-yl)propyl acrylate (CAS 17096-12-7)
- 1,1,1,5,5,5-Hexamethyl-3-octyl-3-((trimethylsilyl)oxy)trisiloxane (CAS 187592-85-4)
- 1,1,1,9,9,9-Hexamethyl-3,5,7-trioctyl-3,5,7-tris((trimethylsilyl)oxy)pentasiloxane (CAS 187593-69-7)
- 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)
Recommended Standards
- 1-(4-nitrophenylsulfonyl)indole-3-sulfonyl chloride 1020722-12-6 (CAS 1020722-12-6)
- Roxadustat Impurity 25 (CAS 2699139-12-1)
- N-{[3-chloro-5-(trifluoromethyl)pyridin-2-yl]methyl}naphthalene-1-sulfonamide (CAS 239112-32-4)
- Indoxacarb Impurity 4 (CAS 170917-89-2)
- 2,4-Diethynylfuran (CAS 189458-05-7)
- 2-Cyclopropoxy-4-(trifluoromethyl)aniline (CAS 1243357-09-6)
- Ethyl 2-(3-(4-fluorophenyl)oxetan-3-yl)acetate (CAS 1393545-12-4)
- Mal-amide-PEG2-oxyamine (CAS 2253965-09-0)
- 1-(3-HYdroxybenzoyl)piperidin-4-one (CAS 1016671-85-4)
- 2-[2-(propan-2-yl)pyrimidin-5-yl]ethan-1-amine (CAS 944905-69-5)
- 8-Chloro-2-(3,4-dichlorophenyl)-6-(trifluoromethyl)imidazo[1,2-a]pyridine (CAS 866137-80-6)
- 5-Bromo-3-(bromomethyl)-1-benzothiophene (CAS 1757-24-0)
- (E)-4-((tert-Butylthio)methylene)-3-methylisoxazol-5(4H)-one (CAS 61861-45-8)
- Semaglutide impurity 42 (CAS CATO-C4X-222642)
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