1,1,3,3,5,5-Hexamethyltrisiloxane
1,1,3,3,5,5-Hexamethyltrisiloxane (CAS: 1189-93-1; Molecular Formula: [(CH3)2SiHO]2Si(CH3)2; Molecular Weight: 208.48) is a siloxane compound characterised by Si-H bonds. It finds utility as a building block in organosilicon chemistry, serving as a precursor in the synthesis of more complex siloxane polymers and specialty silicones. Its reactivity makes it valuable in specific chemical transformations within research and industrial settings.
- Synonyms
- 3,5,5-Hexamethyltrisiloxane
![1,1,3,3,5,5-Hexamethyltrisiloxane ([(CH3)2SiHO]2Si(CH3)2) — chemical structure, CAS 1189-93-1; Chemistry, fine chemical supplied by Tech Serve Solutions](/_next/image?url=https%3A%2F%2Fpub-f4d920c906024441a773a96f7098e551.r2.dev%2Fimages%2Fproducts%2F1189-93-1.png&w=3840&q=75)
Chemical Synthesis Intermediate
Utilised as a reactive intermediate in the synthesis of organosilicon compounds and polymers. The presence of Si-H bonds allows for hydrosilylation reactions and other functionalisation pathways.
Precursor for Silicone Materials
Serves as a starting material for the development of specialised silicone fluids, resins, and elastomers. Its structure can be incorporated to tailor the properties of the final silicone products.
Research and Development
Employed in laboratory settings for exploring novel organosilicon chemistry and developing new synthetic methodologies. Its well-defined structure aids in mechanistic studies.
| Molecular weight | 208.48 |
|---|---|
| Linear formula | [(CH3)2SiHO]2Si(CH3)2 |
| Assay | 95% |
| Boiling point | 128 °C(lit.) |
| Density | 0.822 g/mL at 25 °C(lit.) |
| Refractive index | n20/D 1.383(lit.) |
Hazard statements
- H225Highly flammable liquid and vapour
Precautionary statements
- P210Keep away from heat, sparks and open flames. No smoking
| Protective equipment | Eyeshields, Faceshields, full-face respirator (US), Gloves, multi-purpose combination respirator cartridge (US), type ABEK (EN14387) respirator filter |
|---|---|
| Flash point | 20 °C / 68 °F |
| Transport (UN / ADR) | UN 1993BF 3 / PGII |
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | F |
| Risk statements (R) | 11 |
| Safety statements (S) | 16-23-24/25 |
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 1,1,3,3,5,5-Hexamethyltrisiloxane used for?
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1,1,3,3,5,5-Hexamethyltrisiloxane is primarily used as a reactive intermediate in chemical synthesis, particularly in the field of organosilicon chemistry. It acts as a precursor for creating various silicone-based materials and polymers, and is also utilised in research and development for exploring new synthetic routes.
What is the CAS number and molecular formula for 1,1,3,3,5,5-Hexamethyltrisiloxane?
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The CAS number for 1,1,3,3,5,5-Hexamethyltrisiloxane is 1189-93-1. Its linear molecular formula is [(CH3)2SiHO]2Si(CH3)2.
What grade and purity does Tech Serve Solutions supply for 1,1,3,3,5,5-Hexamethyltrisiloxane?
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Tech Serve Solutions supplies 1,1,3,3,5,5-Hexamethyltrisiloxane with a minimum purity of 95%. TSS does not represent this product as USP, BP, EP, or any other pharmacopoeia grade.
How should 1,1,3,3,5,5-Hexamethyltrisiloxane be handled safely?
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1,1,3,3,5,5-Hexamethyltrisiloxane is a flammable liquid and vapour (H225). It should be kept away from heat, hot surfaces, sparks, open flames, and other ignition sources. Ensure adequate ventilation and use appropriate personal protective equipment, including eyeshields, gloves, and suitable respiratory protection. Refer to the Safety Data Sheet (SDS) for comprehensive safety information.
Is 1,1,3,3,5,5-Hexamethyltrisiloxane a controlled substance?
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The provided data does not indicate that 1,1,3,3,5,5-Hexamethyltrisiloxane is a controlled substance.
How is 1,1,3,3,5,5-Hexamethyltrisiloxane packed and exported?
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1,1,3,3,5,5-Hexamethyltrisiloxane is classified under UN 1993 BF 3 / PG II for transport. TSS ensures compliance with all relevant shipping and export regulations for hazardous materials.
How can I request a quote or sample for 1,1,3,3,5,5-Hexamethyltrisiloxane?
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To request a quote or a sample of 1,1,3,3,5,5-Hexamethyltrisiloxane, please contact the TSS sales team through our website or by calling our office.
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