AgSil 16H Potassium Silicate Fertilizer Grade
> AgSil 16H is a horticultural potassium silicate solution with a 2.5:1 SiO2:K2O ratio, used as a plant nutrient supplement and for disease resistance. It is a commercial potassium silicate, not formulated as a fertilizer preparation, and therefore falls under tariff item 2839.90.00 as an "other" silicate.
Import Duty Rates by Country of Origin
| Origin Country | MFN Tariff | Surtaxes | Total Effective Rate |
|---|---|---|---|
| 🇨🇳China | Free | — | Free |
| 🇲🇽Mexico | Free | — | Free |
| 🇺🇸United States | Free | — | Free |
| 🇩🇪Germany | Free | — | Free |
| 🇯🇵Japan | Free | — | Free |
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If the product is put up as a fertilizer with added nutrients
Fertilizer preparations containing potassium are classified in Chapter 31.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right tariff item — and can price the duty on it in the same conversation.
Import Tips & Compliance
• > Ensure the product is declared as a commercial potassium silicate, not a fertilizer, to avoid misclassification under Chapter 31
• Provide a technical data sheet showing the SiO2:K2O ratio and concentration
• Verify if the solution contains any additives that could change its classification
Related Products under Tariff item 2839.90.00
Industrial Potassium Silicate 40% Solids
> Industrial Potassium Silicate 40% Solids is an aqueous solution of potassium silicate used in paper manufacturing and detergents. It is a commercial alkali metal silicate of potassium, meeting Chapter 28 definitions for separate chemically defined compounds in solution, and is classified under tariff item 2839.90.00.
Liquid Potassium Silicate KAS-10
> Liquid Potassium Silicate KAS-10 is a high-ratio potassium silicate liquid with a SiO2:K2O ratio of 3.3:1, used in specialty coatings and soil stabilizers. It is a commercial potassium silicate, chemically defined, and falls under tariff item 2839.90.00 as an "other" silicate.
Potassium Silicate Liquid
> Potassium Silicate Liquid is a clear liquid solution of potassium silicate used in specialty paints, welding electrodes, and fireproofing agents. It is a commercial alkali metal silicate, meeting Chapter 28 definitions, and is classified under tariff item 2839.90.00.
Potassium Silicate Solution (PQ Corporation Kasil #6)
> Kasil used in adhesives, coatings, and welding electrodes. It is a commercial potassium silicate, meeting Chapter 28 definitions, and is classified under tariff item 2839.90.00.
Potassium Waterglass Powder (Technical Grade)
> Potassium Waterglass Powder is an anhydrous potassium silicate powder derived from spray-dried liquid, used in foundry molds and refractory cements. It is a commercial potassium silicate, chemically defined, and falls under tariff item 2839.90.00.
PQ Corporation Kasil #19 Potassium Silicate
> Kasil welding rod binders and high-performance coatings. It is a commercial potassium silicate, meeting Chapter 28 definitions, and is classified under tariff item 2839.90.00.