Hexamethylcyclotrisiloxane
Hexamethylcyclotrisiloxane (CAS 541-05-9, C6H18O3Si3) is an organosilicon compound with a molecular weight of 222.46 g/mol. This cyclic siloxane features a stable, alternating silicon-oxygen backbone with methyl groups attached to each silicon atom. It finds utility as a monomer in the synthesis of silicone polymers and as a building block in organosilicon chemistry, offering a route to various silicon-containing materials.
Silicone Polymer Synthesis
Hexamethylcyclotrisiloxane serves as a key cyclic monomer for ring-opening polymerization. This process allows for the controlled synthesis of linear polydimethylsiloxanes, which are the foundation for many silicone-based materials used in sealants, lubricants, and coatings.
Organosilicon Chemistry Intermediate
As a reactive cyclic siloxane, it acts as a versatile intermediate in the synthesis of more complex organosilicon compounds. Its structure facilitates reactions that introduce silicon into various organic frameworks for specialized applications.
Research and Development
This compound is employed in academic and industrial research for exploring novel silicon-based materials and chemical transformations. Its defined structure makes it valuable for studying polymerization mechanisms and developing new synthetic routes.
| Molecular weight | 222.46 |
|---|---|
| Empirical formula | C6H18O3Si3 |
| Assay | 98% |
| Boiling point | 134 °C(lit.) |
| Vapour density | 1 (vs air) |
| Melting point | 50-64 °C(lit.) |
Hazard statements
- H228Flammable solid
Precautionary statements
- P210Keep away from heat, sparks and open flames. No smoking
| Protective equipment | dust mask type N95 (US), Eyeshields, full-face particle respirator type N100 (US), Gloves, respirator cartridge type N100 (US), type P1 (EN143) respirator filter, type P3 (EN 143) respirator cartridges |
|---|---|
| Flash point | 35 °C / 95 °F |
| Transport (UN / ADR) | UN 1325 4.1 / PGII |
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | F |
| Risk statements (R) | 11 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is Hexamethylcyclotrisiloxane used for?
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Hexamethylcyclotrisiloxane is primarily used as a monomer in the synthesis of silicone polymers and as an intermediate in organosilicon chemistry for research and development.
What are the CAS number and formula for Hexamethylcyclotrisiloxane?
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The CAS number for Hexamethylcyclotrisiloxane is 541-05-9, and its empirical formula is C6H18O3Si3.
What grade and purity does Tech Serve Solutions supply for Hexamethylcyclotrisiloxane?
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Tech Serve Solutions supplies Hexamethylcyclotrisiloxane with an assay of 98%. We do not represent this product as USP, BP, EP, or any other pharmacopoeia grade.
How should Hexamethylcyclotrisiloxane be handled safely?
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Hexamethylcyclotrisiloxane is a flammable solid (H228) requiring strict adherence to safety protocols. Use in a well-ventilated area, away from ignition sources. Appropriate personal protective equipment, including dust masks (type N95 or P3), eyeshields, and gloves, is essential. Refer to the safety data sheet for comprehensive handling information.
Is Hexamethylcyclotrisiloxane flammable?
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Yes, Hexamethylcyclotrisiloxane is classified as a flammable solid with a flash point of 35 °C (95 °F) and is assigned the hazard statement H228.
How is Hexamethylcyclotrisiloxane packed and shipped?
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Hexamethylcyclotrisiloxane is packed and shipped according to its hazard classification as a UN 1325, Class 4.1, Packing Group II flammable solid, adhering to international regulations for transportation.
How can I request a sample or quote for Hexamethylcyclotrisiloxane?
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To request a sample or obtain a quote for Hexamethylcyclotrisiloxane, please contact our sales department through the TSS website or via email, providing your specific requirements and shipping details.
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