Tris(trimethylsilyl)methane
Tris(trimethylsilyl)methane (CAS: 1068-69-5), with the formula [(CH3)3Si]3CH, is an organosilicon compound with a molecular weight of 232.59 g/mol. It is characterised by the sterically demanding tris(trimethylsilyl)methyl group, often referred to as the 'risyl' group. This unique structure makes it a valuable reagent in organic synthesis, particularly where bulky substituents are required to influence reaction pathways or product stereochemistry.
![Tris(trimethylsilyl)methane ([(CH3)3Si]3CH) — chemical structure, CAS 1068-69-5; Chemistry, fine chemical supplied by Tech Serve Solutions](/_next/image?url=https%3A%2F%2Fpub-f4d920c906024441a773a96f7098e551.r2.dev%2Fimages%2Fproducts%2F1068-69-5.png&w=3840&q=75)
Synthesis of Bulky Organosilicon Compounds
Utilised as a precursor for introducing the sterically hindered tris(trimethylsilyl)methyl group into various molecular frameworks. This is valuable in designing specialised polymers, ligands, or materials where steric bulk is a key property.
Stabilisation of Reactive Species
The 'risyl' group can provide significant steric protection to reactive centres. This compound can be used in the generation and stabilisation of otherwise transient organometallic species or carbanions.
Research and Development
Serves as a specialised building block in academic and industrial research laboratories for exploring novel chemical transformations and synthesizing complex target molecules.
| Molecular weight | 232.59 |
|---|---|
| Linear formula | [(CH3)3Si]3CH |
| Assay | 97% |
| Boiling point | 55-56 °C/2 mmHg(lit.) |
| Density | 0.827 g/mL at 25 °C(lit.) |
| Refractive index | n20/D 1.464(lit.) |
| Application | Sterically demanding \"risyl\"group.1 |

Hazard statements
- H315Causes skin irritation
- H319Causes serious eye irritation
- H335May cause respiratory irritation
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P305IF IN EYES
| Protective equipment | Eyeshields, full-face respirator (US), Gloves, multi-purpose combination respirator cartridge (US), type ABEK (EN14387) respirator filter |
|---|---|
| Flash point | 76 °C / 168.8 °F |
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xi |
| Risk statements (R) | 36/37/38 |
| Safety statements (S) | 26-36 |
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 Tris(trimethylsilyl)methane used for?
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Tris(trimethylsilyl)methane is primarily used in chemical synthesis to introduce the sterically demanding 'risyl' group. It is valuable for stabilising reactive species and in the synthesis of complex organosilicon compounds and other bulky structures.
What is the CAS number and formula for Tris(trimethylsilyl)methane?
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The CAS number for Tris(trimethylsilyl)methane is 1068-69-5, and its chemical formula is [(CH3)3Si]3CH.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Tris(trimethylsilyl)methane with a purity of 97% (assay). This product is intended for laboratory and research use, and TSS does not represent it as meeting USP, BP, or EP pharmacopoeia standards.
How should Tris(trimethylsilyl)methane be handled safely?
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Tris(trimethylsilyl)methane is classified as a Warning substance, causing skin irritation (H315), serious eye irritation (H319), and respiratory irritation (H335). Always wear eyeshields and suitable protective gloves. Ensure adequate ventilation, and use a full-face respirator if necessary. Avoid breathing vapours. In case of contact, follow the precautionary statements P261 and P305 + P351 + P338.
How is Tris(trimethylsilyl)methane packed and shipped?
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As a global supplier and exporter of fine chemicals, Tech Serve Solutions ensures appropriate packaging for safe transport. Please contact us for specific details regarding international shipping regulations and available pack sizes for Tris(trimethylsilyl)methane.
How can I request a quote or sample?
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To request a quote or a sample of Tris(trimethylsilyl)methane, please visit the Tech Serve Solutions website and use the designated inquiry forms or contact our sales team directly with your requirements.
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