1,1,1,3,5,5,5-Heptamethyltrisiloxane
1,1,1,3,5,5,5-Heptamethyltrisiloxane (CAS: 1873-88-7), with the molecular formula [(CH3)3SiO]2SiHCH3 and a molecular weight of 222.50 g/mol, is a versatile organosilicon compound. It serves as a valuable intermediate in chemical synthesis, particularly within the fields of organometallic reagents and siloxane chemistry. Its distinct structure allows for participation in various synthetic pathways.
- Synonyms
- 3,5,5,5-Heptamethyltrisiloxane
![1,1,1,3,5,5,5-Heptamethyltrisiloxane ([(CH3)3SiO]2SiHCH3) — chemical structure, CAS 1873-88-7; Chemistry, fine chemical supplied by Tech Serve Solutions](/_next/image?url=https%3A%2F%2Fpub-f4d920c906024441a773a96f7098e551.r2.dev%2Fimages%2Fproducts%2F1873-88-7.png&w=3840&q=75)
Chemical Synthesis Intermediate
Utilised as a building block in the synthesis of more complex organosilicon compounds and polymers. Its reactive silane hydrogen atom can undergo various chemical transformations.
Organometallic Chemistry
Functions as a precursor or reagent in the development of novel organometallic compounds. The siloxane backbone offers unique electronic and steric properties.
Siloxane Research
Employed in research settings to investigate the properties and reactivity of branched siloxanes. Useful for studying polymer modification and material science applications.
| Molecular weight | 222.50 |
|---|---|
| Linear formula | [(CH3)3SiO]2SiHCH3 |
| Assay | 97% |
| Boiling point | 142 °C(lit.) |
| Density | 0.819 g/mL at 25 °C(lit.) |
| Refractive index | n20/D 1.382(lit.) |
Hazard statements
- H225Highly flammable liquid and vapour
- H315Causes skin irritation
- H319Causes serious eye irritation
- H335May cause respiratory irritation
Precautionary statements
- P210Keep away from heat, sparks and open flames. No smoking
- P261Avoid breathing dust, fume, gas or vapours
- P305IF IN EYES
| Protective equipment | Eyeshields, Faceshields, full-face respirator (US), Gloves, multi-purpose combination respirator cartridge (US), type ABEK (EN14387) respirator filter |
|---|---|
| Flash point | 22 °C / 71.6 °F |
| Transport (UN / ADR) | UN 1993BF 3 / PGII |
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xi |
| Risk statements (R) | 10-36/37/38 |
| 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 1,1,1,3,5,5,5-Heptamethyltrisiloxane used for?
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1,1,1,3,5,5,5-Heptamethyltrisiloxane is primarily used as an intermediate in chemical synthesis, particularly in the fields of organometallic reagents and organosilicon chemistry, and for research into siloxane properties.
What is the CAS number and formula for 1,1,1,3,5,5,5-Heptamethyltrisiloxane?
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The CAS number is 1873-88-7 and the linear formula is [(CH3)3SiO]2SiHCH3.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 1,1,1,3,5,5,5-Heptamethyltrisiloxane with an assay of 97%. This product is supplied for research and chemical synthesis purposes and is not represented as USP, BP, EP, or other pharmacopoeia grades.
How should 1,1,1,3,5,5,5-Heptamethyltrisiloxane be handled safely?
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This compound is flammable (Flash Point: 22 °C) and can cause skin irritation (H315), serious eye irritation (H319), and respiratory irritation (H335). Handle with appropriate personal protective equipment including eyeshields, gloves, and use in a well-ventilated area. Refer to the Safety Data Sheet for full details.
How is this chemical packed and shipped?
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1,1,1,3,5,5,5-Heptamethyltrisiloxane is typically packed according to UN 1993 BF 3 / PG II regulations for flammable liquids and exported globally by TSS.
How can I request a quote or sample?
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To request a quote or sample of 1,1,1,3,5,5,5-Heptamethyltrisiloxane, please contact the Tech Serve Solutions sales team via our website or direct contact details.
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