Trisiloxane polyether

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.

Where is Trisiloxane polyether used?

• Agriculture: superspreader adjuvant improving foliar uptake of herbicides, fungicides, and plant growth regulators by allowing spray droplets to spread rapidly across waxy leaf surfaces
• Agriculture: enhances nutrient uptake efficiency of foliar fertilizers.
• Personal care: incorporated into leave-on and rinse-off products where even distribution across skin or hair is required
• Textile and leather processing: improves wetting and penetration of dye baths and enhances application of finishing agents into fibrous substrates
• Industrial and household cleaning: enhances surface wetting and soil displacement on low-energy surfaces
• Coatings and inks: prevents craters and fish eyes and improves flow and leveling.
• Surface wetting agent for high-surface-tension surfaces such as plastics and oily metals.
• It enables uniform spreading and penetration of aqueous solutions across hydrophobic surfaces.

Formulation notes

• Stable over a broad pH range and compatible with most pesticides and fertilizers.

Typical specification

• Viscosity at 25°C is 20–40 mm²/s.
• Surface tension in 0.1% aqueous solution is 20.0–21.0 mN/m.
• Cloud point in 0.1% aqueous solution is ≤10°C.
• Active content is ≥99.5%.

Regulatory status

• REACH registration status is not determined on the public ECHA register.
• FCC or pharmacopoeia grading is not applicable.

Storage, packaging and handling

• Packaged in 25 kg or 200 kg plastic or steel drums and 1000 L IBC containers.
• Should be stored cool, dry and well ventilated with containers kept tightly closed.

Frequently asked questions about Trisiloxane polyether

What are the typical commercial grades of trisiloxane polyether?

It is supplied as a clear liquid, with technical grade and agricultural adjuvant grade being the most common commercial specifications.

How does trisiloxane polyether affect spray retention on leaves?

It increases adhesion to leaves, reducing wash-off from rain or irrigation.

What are the solubility and foaming characteristics of trisiloxane polyether?

It is soluble in water, alcohol and hydro-alcoholic systems, and has inherently low foaming behavior in most aqueous systems.

Technical content is compiled and updated by the SoleChem product team from public technical sources; the certificate of analysis (COA) governs product-specific specifications.