Hexamethyldisiloxane
Hexamethyldisiloxane (CAS: 107-46-0) is a clear, colorless organosilicon compound with the linear formula (CH₃)₃SiOSi(CH₃)₃ and a molecular weight of 162.38 g/mol. It serves as a versatile building block and intermediate in chemical synthesis, particularly in the production of silicone polymers and other organosilicon compounds. Its notable properties include a low boiling point and specific viscosity, making it suitable for various industrial applications.
- IUPAC
- HMDSO
- Synonyms
- Bis(trimethylsilyl) etherHexamethyldisiloxanTris(trimethylsilyl)siloxane
Intermediate for Silicone Production
Hexamethyldisiloxane is widely employed as a starting material or intermediate in the synthesis of various silicone polymers, fluids, and resins. It contributes to the formation of Si-O-Si backbones essential for these materials.
Reagent in Organic Synthesis
This siloxane functions as a silylating agent and protective group in organic synthesis. It is utilized to introduce trimethylsilyl (TMS) groups, which can modify the reactivity or solubility of organic molecules.
Chemical Vapor Deposition (CVD)
Due to its volatility and composition, Hexamethyldisiloxane can be used as a precursor in Chemical Vapor Deposition processes for creating silicon-containing thin films.
| Molecular weight | 162.38 |
|---|---|
| Linear formula | (CH3)3SiOSi(CH3)3 |
| Assay | ≥98% |
| Grade | NMR grade |
| Boiling point | 101 °C(lit.)101 °C |
| Density | 0.764 g/mL at 20 °C(lit.) |
| Refractive index | n20/D 1.377(lit.) |
| Melting point | −59 °C(lit.) |
| Vapour density | >1 (vs air) |
| Viscosity | 0.65 cSt(25 °C) |
Hazard statements
- H225Highly flammable liquid and vapour
- H410Very toxic to aquatic life with long-lasting effects
Precautionary statements
- P210Keep away from heat, sparks and open flames. No smoking
- P273Avoid release to the environment
- P501Dispose of contents and container per local regulations
| Protective equipment | Eyeshields, Faceshields, full-face respirator (US), Gloves, multi-purpose combination respirator cartridge (US), type ABEK (EN14387) respirator filter |
|---|---|
| Flash point | 0 °C / 32 °F |
| Transport (UN / ADR) | UN 1993BF 3 / PGII |
| Water hazard class (WGK, DE) | 1 |
| Hazard codes (EU) | F,N |
| Risk statements (R) | 11-50/53 |
| Safety statements (S) | 16-61 |
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 Hexamethyldisiloxane used for?
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Hexamethyldisiloxane is primarily used as an intermediate in the synthesis of silicone polymers and other organosilicon compounds, and as a silylating agent in organic synthesis.
What is the CAS number and formula for Hexamethyldisiloxane?
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The CAS number for Hexamethyldisiloxane is 107-46-0, and its linear formula is (CH₃)₃SiOSi(CH₃)₃.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Hexamethyldisiloxane in NMR grade with an assay of ≥98%. We do not represent this product as USP, BP, or EP grade.
How should Hexamethyldisiloxane be handled safely?
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Hexamethyldisiloxane is a highly flammable liquid and vapour (H225) and is toxic to aquatic life with long-lasting effects (H410). Handle with appropriate personal protective equipment, including safety goggles, gloves, and a suitable respirator, in a well-ventilated area away from ignition sources.
Is Hexamethyldisiloxane a controlled substance?
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Based on the provided data, Hexamethyldisiloxane is not listed as a controlled substance.
How is Hexamethyldisiloxane packed, shipped, and exported?
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Hexamethyldisiloxane is classified under UN 1993, BF 3, PG II for transport. We adhere to all relevant regulations for packing, shipping, and exporting this chemical globally.
How can I request a quote or sample of Hexamethyldisiloxane?
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To request a quote or sample, please contact our sales team through the website or provide your details via the contact form. Our team will respond promptly.
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