1,7-Dichloro-octamethyltetrasiloxane
1,7-Dichloro-octamethyltetrasiloxane (CAS 2474-02-4) is an organosilicon compound with the linear formula Cl[Si(CH3)2O]3Si(CH3)2Cl and a molecular weight of 351.52 g/mol. This siloxane derivative serves as a key intermediate in chemical synthesis, particularly within organometallic and organosilicon chemistry. Its reactive chloro-silyl end groups facilitate its use in polymerisation and modification processes, contributing to the development of advanced materials.
- Synonyms
- Cl[Si(CH3)2O]3Si(CH3)2Cl
![1,7-Dichloro-octamethyltetrasiloxane (Cl[Si(CH3)2O]3Si(CH3)2Cl) — chemical structure, CAS 2474-02-4; Chemistry, fine chemical supplied by Tech Serve Solutions](/_next/image?url=https%3A%2F%2Fpub-f4d920c906024441a773a96f7098e551.r2.dev%2Fimages%2Fproducts%2F2474-02-4.png&w=3840&q=75)
Chemical Synthesis Intermediate
Utilised as a building block in the synthesis of more complex organosilicon compounds and polymers. Its dichloro-functionalisation allows for controlled chain extension and cross-linking reactions.
Organosilicon Chemistry
A valuable reagent for introducing specific siloxane structures into organic molecules. It is employed in reactions where precise control over siloxane chain length and end-group functionality is required.
Material Science Research
Investigated for its potential in developing novel silicone-based materials with tailored properties. Its reactive nature makes it suitable for surface modification and the creation of functionalised polymers.
| Molecular weight | 351.52 |
|---|---|
| Linear formula | Cl[Si(CH3)2O]3Si(CH3)2Cl |
| Assay | 95% |
| Boiling point | 222 °C(lit.) |
| Density | 1.011 g/mL at 25 °C(lit.) |
| Refractive index | n20/D 1.405(lit.) |
| Melting point | −62 °C(lit.) |
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 |
|---|---|
| Flash point | 87 °C / 188.6 °F |
| 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 1,7-Dichloro-octamethyltetrasiloxane used for?
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1,7-Dichloro-octamethyltetrasiloxane is primarily used as an intermediate in chemical synthesis, particularly within organosilicon and organometallic chemistry, and in material science research for developing novel silicone-based materials.
What are the CAS number and formula for 1,7-Dichloro-octamethyltetrasiloxane?
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The CAS number is 2474-02-4 and its linear formula is Cl[Si(CH3)2O]3Si(CH3)2Cl.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 1,7-Dichloro-octamethyltetrasiloxane with an assay of 95%. We do not represent this product as USP, BP, EP, or any other pharmacopoeia grade.
How should 1,7-Dichloro-octamethyltetrasiloxane be handled safely?
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This compound is classified as Danger, causing severe skin burns and eye damage (H314). Handling requires full protective equipment including faceshields, goggles, chemical-resistant gloves, and appropriate respiratory protection (e.g., type ABEK respirator filter). Refer to the safety data sheet for comprehensive guidance.
Is 1,7-Dichloro-octamethyltetrasiloxane a controlled substance?
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The provided data does not indicate that 1,7-Dichloro-octamethyltetrasiloxane is a controlled substance.
How is this chemical shipped or exported?
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1,7-Dichloro-octamethyltetrasiloxane is shipped under UN 2987, Class 8, Packing Group II. Tech Serve Solutions is experienced in global export of fine chemicals.
How can I request a quote or sample?
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Please contact our sales team directly via our website or provide your details for a prompt quotation or sample request.
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