Di-tert-butyldichlorosilane
Di-tert-butyldichlorosilane (CAS 18395-90-9) is a silicon-based organochlorine compound with the linear formula [(CH3)3C]2SiCl2 and a molecular weight of 213.22. It is a reagent primarily utilized in chemical synthesis for the preparation of siliranes and as a protecting group for diols. Available from Tech Serve Solutions with an assay of 98%, it serves as a valuable building block in organic chemistry research and development.
- IUPAC
- DTBSCl2
![Di-tert-butyldichlorosilane ([(CH3)3C]2SiCl2) — chemical structure, CAS 18395-90-9; Chemistry, fine chemical supplied by Tech Serve Solutions](/_next/image?url=https%3A%2F%2Fpub-f4d920c906024441a773a96f7098e551.r2.dev%2Fimages%2Fproducts%2F18395-90-9.png&w=3840&q=75)
Silirane Synthesis
Di-tert-butyldichlorosilane is a key precursor in the synthesis of siliranes, which are cyclic organosilicon compounds. This application leverages its reactive silicon-chlorine bonds to form new silicon-carbon bonds.
Diol Protection
This compound serves as an effective protecting reagent for diols in multi-step organic syntheses. It forms stable silyl ethers, preventing unwanted reactions at the hydroxyl groups during subsequent transformations.
Synthetic Reagent
As a versatile synthetic reagent, Di-tert-butyldichlorosilane finds broad utility in laboratory settings for constructing complex silicon-containing molecules. Its structure allows for specific derivatization strategies.
| Molecular weight | 213.22 |
|---|---|
| Linear formula | [(CH3)3C]2SiCl2 |
| Assay | 98% |
| Boiling point | 190 °C/729 mmHg(lit.) |
| Density | 1.009 g/mL at 25 °C(lit.) |
| Refractive index | n20/D 1.457(lit.) |
| Storage temperature | 2-8°C |
| Melting point | −15 °C(lit.) |
| Application | Reagent used for preparing siliranes1 and protecting diols.2 |

Hazard statements
- H314Causes severe skin burns and eye damage
Precautionary statements
- P280Wear protective gloves, clothing and eye/face protection
- P305IF IN EYES
- P310Immediately call a POISON CENTER or doctor
| Protective equipment | Faceshields, full-face respirator (US), Gloves, Goggles, multi-purpose combination respirator cartridge (US), type ABEK (EN14387) respirator filter |
|---|---|
| Transport (UN / ADR) | UN 2987 8 / PGII |
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | C |
| Risk statements (R) | 34 |
| Safety statements (S) | 26-36/37/39-45 |
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 Di-tert-butyldichlorosilane used for?
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Di-tert-butyldichlorosilane is used as a reagent for preparing siliranes and for protecting diols in chemical synthesis.
What is the CAS number and formula for Di-tert-butyldichlorosilane?
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The CAS number is 18395-90-9 and the linear formula is [(CH3)3C]2SiCl2.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Di-tert-butyldichlorosilane with an assay of 98%. This product is not represented as USP, BP, or EP grade.
What are the safety and handling precautions for Di-tert-butyldichlorosilane?
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Di-tert-butyldichlorosilane is classified as Danger, causing severe skin burns and eye damage (H314). Appropriate personal protective equipment, including face shields, gloves, and respirators, must be used. Handle in a well-ventilated area and follow all safety recommendations.
How is Di-tert-butyldichlorosilane shipped and exported?
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Di-tert-butyldichlorosilane is shipped and exported under UN 2987, Class 8, Packing Group II, indicating it is a corrosive material. TSS ensures compliance with all transportation regulations for global export.
How can I request a quote or sample of Di-tert-butyldichlorosilane?
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To request a quote or a sample of Di-tert-butyldichlorosilane, please contact our sales department through the website or by phone.
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