typical properties
| Brand number |
MM |
| Name |
Hexamethyldisiloxane (HMDSO) |
| Quality indicators |
Purity: ≥ 99.0% |
| Molecular formula |
C₆H₁₈OSi₂ |
| Molecular weight |
162.38 g/mol |
| Appearance |
Colorless, clear liquid |
| Kinematic viscosity (25 °C) |
0.65 cSt |
| Boiling point |
99–100 °C |
| Density |
0.7636 g/mL |
| Flash point |
−1 °C |
| Auto-ignition temperature |
340 °C |
| Melting point |
−67 °C |
| Refractive index (20 °C) |
1.3774 |
| Water solubility |
Insoluble |
| Packaging |
150kg /drum / it can be customized on customer requirements. |
| Storage |
Store in the original unopened container in a cool, dry, shaded and well-ventilated place. Keep tightly closed and protect from moisture. Keep away from heat, sparks, open flames, electrostatic discharge and oxidizing agents. An inert-gas blanket is recommended after opening. |
| Shelf life |
Refer to the best-use-before date stated on the batch label or Certificate of Analysis. |
Target Industries
Silicone fluids, surface treatment, coatings, electronics, chemical synthesis
Product Information
Hexamethyldisiloxane is a low-viscosity, volatile linear methylsiloxane with excellent compatibility with many silicone-based systems. It is widely used as an organosilicon intermediate, chain-stopping agent, solvent or carrier in silicone synthesis, surface treatment and specialty chemical applications.
Typical Applications
- Intermediate and chain stopper for silicone fluids, PDMS and siloxane polymer synthesis.
- Solvent or carrier fluid for silicone formulations, surface treatment and cleaning applications.
- Raw material in silylation chemistry and specialty organosilicon synthesis.
- Precursor or process chemical for silicon-containing coatings and thin-film applications.
Supply & Documentation
Available documentation may include COA, MSDS/SDS, TDS and customized export documents according to customer requirements. Packaging, purity and specification can be confirmed based on actual order grade.
