Overview
Trisiloxane polyether (CAS 27306-78-1 ), commercially recognized as Silwet L-77, is a silicone-based surfactant engineered to dramatically reduce surface tension at very low use concentrations.
It enables uniform spreading and penetration of aqueous solutions across hydrophobic surfaces. This performance characteristic drives its selection across agriculture, personal care, and industrial cleaning applications.
In agrochemical formulations, it acts as a superspreader adjuvant, improving foliar uptake of herbicides, fungicides, and plant growth regulators by allowing spray droplets to spread rapidly across waxy leaf surfaces.
Personal care formulators incorporate it into leave-on and rinse-off products where even distribution across skin or hair is required. In textile and leather processing, it improves wetting and penetration of dye baths.
It also enhances the application of finishing agents into fibrous substrates. Industrial and household cleaning formulations use it to enhance surface wetting and soil displacement on low-energy surfaces.
Trisiloxane polyether is supplied as a clear liquid. It is available in technical grade for agricultural and industrial applications, with personal care-grade material also offered to meet cosmetic formulation requirements.
Bulk quantities are typically supplied in drums or IBCs. Our material is manufactured to rigorous standards to ensure consistent performance and stability across a wide range of diverse industrial and commercial formulations.
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Physical Properties
| Melting Point | −14 °C |
| Boiling Point | 100 °C @ Press: <1 Torr |
| Density | 1.007 g/cm³ @ Temp: 20-25 °C |
| Flash Point | >230 °F |
| Refractive Index | n 20/D 1.455 |
Safety & Handling
Warning GHS07 GHS09 Hazard Statements H302 Harmful if swallowed H312 Harmful in contact with skin H315 Causes skin irritation H319 Causes serious eye irritation H332 Harmful if inhaled H411 Toxic to aquatic life with long lasting effects Precautionary Statements P261 Avoid breathing dust/fume/gas/mist/vapours/spray. P264 Wash … thoroughly after handling. P270 Do not eat, drink or smoke when using this product. P271 Use only outdoors or in a well-ventilated area. P273 Avoid release to the environment. P280 Wear protective gloves/protective clothing/eye protection/face protection. P317 Get emergency medical help. P321 Specific treatment (see … on this label). P330 Rinse mouth. P391 Collect spillage. P501 Dispose of contents/container in accordance with local regulations. P264+P265 Wash … thoroughly after handling. P301+P317 Get emergency medical help. P302+P352 IF ON SKIN: Wash with plenty of water. P304+P340 IF INHALED: Remove person to fresh air and keep comfortable for breathing. P332+P317 Get emergency medical help. P337+P317 If eye irritation persists: Get medical advice/attention. Get emergency medical help. P362+P364 Take off contaminated clothing and wash it before reuse. P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
Trade & Regulatory
| WGK (Germany) | 3 |
Other Names
Related Products
Chemical Properties
- CAS Number
- 27306-78-1
- EC Number
- 608-078-3
- Mol. Weight
- 338.66
- Category
- Silicones & Silicates