Chemical Name: 1,1,1,3,5,5,5-Heptamethyltrisiloxane
Synonyms: Heptamethyltrisiloxane HPTSO
CAS No.: 1873-88-7
Molecular Fomula: C7H22O2Si3
Molecular weight: 222.5
Appearance: colorless liquid
Assay: ≥99.0%
Parameter | Value |
---|---|
Chemical Name | 1,1,1,3,5,5,5-Heptamethyltrisiloxane |
CAS Number | 1873-88-7 |
Molecular Formula | C7H22O2Si3 |
Molecular Weight | 236.52 g/mol |
Appearance | Colorless transparent liquid |
Purity | ≥99% |
Density (25°C) | 0.86-0.88 g/cm³ |
Boiling Point | 152-154°C |
Flash Point | 46°C (closed cup) |
Property | Heptamethyltrisiloxane | Hexamethyldisiloxane | Octamethyltrisiloxane |
---|---|---|---|
Volatility | Medium | High | Low |
Thermal Stability | Up to 250°C | 200°C | 300°C |
Surface Tension | 18.5 mN/m | 16.2 mN/m | 20.1 mN/m |
Reduces friction in high-speed machinery (0.01%-0.5% concentration range).
Creates hydrophobic coatings with contact angles >110°.
Enhances spreadability in creams (typical use: 2-8% w/w).
Dielectric fluid for thermal management (k=0.15 W/m·K).
Challenge | Improve sunscreen SPF retention |
---|---|
Solution | 3.2% Heptamethyltrisiloxane in emulsion phase |
Result | 38% increase in water resistance |
Application | Thermal interface material |
---|---|
Loading | 12% in silicone matrix |
Performance | 15°C reduction in chip operating temperature |
Contact our siloxane specialists:
info@vivalr.com | |
Phone | (86) 15866781826 |
Request: MSDS/TDS documents | Bulk pricing (200kg+) | Custom modifications
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