Langbeinite Potassium Sulfate Mineral Fertilizer
Langbeinite is a naturally occurring mineral composed of potassium, magnesium, and sulfur, marketed as a fertilizer for its potassium sulfate content. It is classified under tariff item 3104.30.00 because it is a potassic mineral fertilizer, specifically potassium sulfate, not a separate chemically defined compound. The presence of magnesium does not alter its classification as a potassium sulfate fertilizer under Chapter 31.
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 |
More Specific Codes
This product may fall under a more specific subheading:
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If the langbeinite is mixed with other fertilizers or inorganic substances
Mixtures of potassium sulfate with other fertilizing elements fall under heading 31.05 as 'other fertilizers'.
If the product is a crude natural potassium salt other than potassium sulfate
Crude natural potassium salts like carnallite or kainite are classified under this alternative potassic fertilizer item.
If the langbeinite is unprocessed and not used as a fertilizer
Natural mineral substances not specifically classified elsewhere may fall under this heading for mineral products.
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 not put up in forms or packages described in heading 31.05 (e.g
• tablets or retail packs), as that would change classification
• Verify the langbeinite is not mixed with other fertilizers or substances that could shift it to another heading
• Keep documentation of the mineral's composition to support the potassium sulfate classification
Related Products under Tariff item 3104.30.00
Crystal Potassium Sulfate SOP Fertilizer
Large crystal potassium sulfate (SOP) fertilizer for broadcast application in field crops. This product is pure potassium sulphate, a potassic mineral fertilizer, and is not put up in the forms or packages described in heading 31.05, such as tablets or retail packs.
Granular Potassium Sulfate Fertilizer
Granular potassium sulfate (SOP) fertilizer with 50% potassium oxide and 18% sulfur, used for chloride-sensitive crops. This is pure potassium sulphate, a potassic mineral fertilizer, and is not put up in retail forms or packages described in heading 31.05.
High-Purity Potassium Sulfate for Greenhouse Use
Ultra-pure potassium sulfate crystals for greenhouse use, minimizing impurities for sensitive ornamentals. This is pure potassium sulphate, a potassic mineral fertilizer, and is not put up in the forms or packages described in heading 31.05.
SOP 50% K2O Bulk Fertilizer
Bulk potassium sulfate fertilizer standardized at 50% potash (K2O) content, used in tobacco and potato farming. This is pure potassium sulphate, a potassic mineral fertilizer, and is not put up in the forms or packages described in heading 31.05.
Sulfur-Potassium Sulfate Blend Fertilizer
Potassium sulfate enhanced with elemental sulfur for acidifying soils in high-pH areas. The primary component is potassium sulfate, a potassic mineral fertilizer, and the added sulfur is not a fertilizing element (N, P, or K) for Chapter 31 purposes. It is not put up in the forms or packages described in heading 31.05.
Water-Soluble Potassium Sulfate Powder
Fine powder potassium sulfate designed for fertigation and foliar applications, supplying essential K2O and sulfur without chloride. This is pure potassium sulphate, a potassic mineral fertilizer, and is not put up in the forms or packages described in heading 31.05.