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IOTA 005 (Hexamethyldisiloxane, abbreviated as MM) is an important organosilicon intermediate composed of two trimethylsilyl groups connected by an oxygen atom. It features low viscosity, low surface tension, and excellent chemical stability. This colorless transparent liquid has a purity of ≥99.0% and is widely used as an end-capper, cleaning agent, release agent, water repellent, and key raw material for silazane synthesis.
| Parameter | Detail |
|---|---|
| Chemical name | Hexamethyldisiloxane |
| Synonyms | Hexamethyldisiloxane; HMDSO; Silicone ether; MM |
| CAS No. | 107-46-0 |
| EINECS | 203-492-7 |
| Molecular formula | C₆H₁₈OSi₂ |
| Molecular weight | 162.38 |
| Parameter | Specification |
|---|---|
| Appearance | Colorless transparent liquid |
| Density (25°C, g/cm³) | 0.764 |
| Refractive index (20°C) | 1.3765–1.3785 |
| Melting point | -59°C |
| Flash point | -1.1°C |
| Boiling point | 99.5–100.5°C |
| Water solubility | Insoluble |
| Content | ≥99.0% |
✅ High purity (≥99.0%) – stable quality, consistent batch-to-batch performance
✅ Low boiling point (99.5–100.5°C) – easy to distill, purify, and recover
✅ Low surface tension – excellent wetting, penetration, and spreading
✅ Good chemical stability – heat-resistant, oxidation-resistant, stable storage
✅ Excellent hydrophobicity – effective as water-repellent treatment agent
✅ Suitable reactivity – reacts with various nucleophiles for organosilicon derivative synthesis
1. End-Capper (Chain Terminator)
Controls polymerization degree and molecular weight in the production of silicone oils, silicone rubbers, and other polysiloxanes.
2. Cleaning Agent & Release Agent
Used for cleaning electronic components, optical elements, and precision instruments, as well as mold release in plastic and rubber processing.
3. Silazane Raw Material
A key raw material for synthesizing hexamethyldisilazane (HMDS) and other silazane compounds.
4. Water Repellent
Provides durable hydrophobic treatment for glass, ceramics, metals, fabrics, and other surfaces.
5. GC Stationary Phase & Analytical Reagent
Used as a stationary phase in gas chromatography and as a reagent in organic synthesis and analytical chemistry.
6. Pharmaceuticals & Medical Materials
Used in drug synthesis and surface treatment of medical materials.
Store sealed in a cool, well-ventilated, dry place away from heat sources and strong oxidizers
Packaging specifications: customizable upon request
✅ High purity (≥99.0%) – reliable and consistent quality
✅ Multi-functional: end-capper, cleaning agent, release agent, water repellent, and raw material
✅ Low boiling point and low surface tension – easy handling and recovery
✅ Suitable for silicone, electronics, pharmaceuticals, analytical testing, and more
✅ Excellent batch-to-batch consistency – supports large-scale production
For samples, application recommendations, or technical support, please feel free to contact us.
