Comprehensive Guide to 1,1,1,3,5,5,5-Heptamethyltrisiloxane CAS 1873-88-7
Table of Contents
1. Product Overview & Specifications
| 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) |
2. Performance Comparison with Similar Siloxanes
| 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 |
3. Industrial Applications
3.1 Lubricant Additives
Reduces friction in high-speed machinery (0.01%-0.5% concentration range).
3.2 Surface Treatment
Creates hydrophobic coatings with contact angles >110°.
3.3 Cosmetic Formulations
Enhances spreadability in creams (typical use: 2-8% w/w).
3.4 Electronics Manufacturing
Dielectric fluid for thermal management (k=0.15 W/m·K).
5. Verified Customer Implementations
Case 1: ABC Cosmetics (Germany)
| Challenge | Improve sunscreen SPF retention |
|---|---|
| Solution | 3.2% Heptamethyltrisiloxane in emulsion phase |
| Result | 38% increase in water resistance |
Case 2: XYZ Electronics (China)
| Application | Thermal interface material |
|---|---|
| Loading | 12% in silicone matrix |
| Performance | 15°C reduction in chip operating temperature |
6. Technical & Commercial Consultation
Contact our siloxane specialists:
| info@vivalr.com | |
| Phone | (86) 15866781826 |
Request: MSDS/TDS documents | Bulk pricing (200kg+) | Custom modifications
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