Organosilicone Surfactant H-806

H-806 Spray Adjuvant is a superspreading surfactant based on a trisiloxane alkoxylate. H-806 spray adjuvant lowers the surface tension of spray solutions, beyond that which is achievable with conventional adjuvants.

Typically, H-806 spray adjuvant (@ 0.1 wt %) gives an aqueous surface tension of ~22 mN/m. On the other hand, an octylphenol ethoxylate containing 10 EO units (a commonly used nonionic surfactant) at 1.0 wt % gives a surface tension of only 30 mN/m.

The bottom line H-806 spray adjuvant helps lower the aqueous surface tension more effectively than conven tional spray adjuvants.

Because H-806 spray adjuvant is a superspreading surfactant, the contact angle of spray solutions on leaf surfaces is reduced, leading to an increase in spray coverage (Figure 1).



Product name: Low foam adjuvant H-806

CAS: 134180-76-0

Other descriptions: Silicone Surfactant agriculture, Spray adjuvant agriculture, Silicone adjuvant, Trisiloxane, Polyether modified trisiloxane, Synergist, Spreader, Penetrating Agent, Super wetting, Organosilicone adjuvant, Organosilicone surfactant, Organosilicone pesticide synergist surfactant

Same as Break thru S240, Silwet 806

Key Features and Benefits


Helps improve rainfastness

Promotes rapid uptake of agrochemicals

Promotes spray volume reduction

Low pour point for low temperature applications

Low foaming


Organosilicone Surfactant

Organosilicone Surfactant

Additionally, under specific conditions, H-806 spray adjuvant promotes rapid uptake of agrochemicals into plants via stomatal infiltration. Spray solutions taken into plants in this way become rainfast, thereby improving application reliability.


The low foam properties of H-806 spray adjuvant may make it easier to handle than other organosilicone based spreading agents (Figure 2).

H-806 spray adjuvant is nonionic in nature, making it useful with a broad range of agrochemical formulations.



Surface Tension, mN/m (0.1 wt%) (a)21.5
Viscosity (cps) (b)35
Specific Gravity (25/25°C)1.002
Cloud Point (0.1 wt %), °C<10
Flashpoint, PMCC °C (°F)143

(a) Surface Tension by Wilhelmy Plate Method.

(b) Pensky-Martens Closed Cup, ASTM Method D93.



H-806 spray adjuvant has been used successfully in spray applications globally. Typical applications include

Organosilicone Surfactant

(a) Note: use rates are dependent on crop, agrochemical and spray volume requirements.


In Agrochemical Formulations

H-806 spray adjuvant may be used as a component in agrochemical formulations. Although organosilicone surfactants are subject to hydrolysis under acidic or basic conditions, optimum performance is achieved by buffering the formulation to pH 6.5 -7.5. Additionally, it is recommended that Silwet 806 spray adjuvant be used at a concentration of at least 5%, based on the total formulation.


As A Tank Mix Adjuvant

H-806 spray adjuvant, when used as a tank-side adjuvant may be used to improve spray coverage, improve uptake or to allow for a reduction in spray volume. H-806 spray adjuvant is most effective as a tank-side adjuvant when spray mixtures are 1) within a pH range of 5-8, and 2) used within 24 hours of preparation.


High spray volumes, coupled with high surfactant rates, are not required to achieve sufficient coverage with H-806 spray adjuvant. In fact, H-806 spray adjuvant may provide adequate coverage in many low volume spray applications at rates between 0.025% and 0.1%.



Before handling, read the Material Safety Data Sheet and container label for safe use, physical and health hazard information.



After sealing packaging products stored in a cool, dry place , H-806 has a shelf life of 36 months from date of manufacture.



H-806 is available in 200L drum and 1000L IBC or others.



Hito chenical believes that the information in this technical data sheet is an accurate description of the typical uses of the product. Hito Chemical , however, disclaims any liability for incidental or consequential damages, which may result from the use of the product that are beyond its control. Therefore, it is the user’s responsibility to thoroughly test the product in their particular application to determine its performance, efficacy and safety. Nothing contained herein is to be considered as permission or a recommendation to infringe any patent or any other intellectual property right.

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