Crude Kieserite Crystals
Crude kieserite crystals are naturally occurring magnesium sulfate monohydrate minerals extracted from evaporite deposits. They are minimally processed by washing to remove surface impurities, which does not alter their crystalline structure, and are therefore classified under tariff item 2530.20.00 as natural magnesium sulphates.
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 kieserite is chemically synthesized or purified beyond natural washing
Synthetic magnesium sulphate falls under inorganic chemicals in chapter 28, not natural minerals.
If imported as a fertilizer with added nutrients or binders
Fertilizer preparations are classified in chapter 31, not as crude minerals.
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 kieserite is unroasted and uncalcined, as processing beyond washing may shift classification
• Declare the product as a natural mineral under heading 25.30 and keep mining documentation to prove its natural origin
• Verify the weight in kilograms or tonnes, excluding any water content, for accurate CBSA assessment
Related Products under Tariff item 2530.20.00
Agricultural Epsom Salt Nuggets
Agricultural epsom salt nuggets are large natural epsom salt forms intended for slow-release soil application. As unprocessed natural magnesium sulphate heptahydrate, they fall under tariff item 2530.20.00, which covers epsomite and natural magnesium sulphates, provided no chemical processing has occurred.
Bulk Natural Magnesium Sulfate Heptahydrate
Bulk natural magnesium sulfate heptahydrate is unrefined epsom salt from natural deposits, used for industrial magnesium extraction. As a natural mineral in crude form, it is classifiable under tariff item 2530.20.00, which includes epsomite and natural magnesium sulphates, and is not excluded by chapter notes.
Evaporite Epsom Salt Coarse Grade
Evaporite epsom salt coarse grade consists of coarse crystalline epsom salt extracted from ancient evaporite basins. Before grinding or refining, it is a natural magnesium sulphate heptahydrate, classifiable under tariff item 2530.20.00, as the extraction and sizing are mechanical processes permitted by chapter note 1.
Kieserite-Epsom Salt Mineral Blend
Kieserite-epsom salt mineral blend is a natural mixture of kieserite monohydrate and epsom salt heptahydrate from evaporite deposits. As a natural combination of magnesium sulphates, it falls under tariff item 2530.20.00, which covers both kieserite and epsomite, provided no mixing with other substances has occurred.
Kieserite Evaporite Rock
Kieserite evaporite rock consists of kieserite-bearing material from ancient salt deposits, crushed to fist-sized pieces for transport. The crushing is a mechanical process permitted by chapter note 1, and the rock remains a natural magnesium sulphate, classifiable under tariff item 2530.20.00.
Kieserite Mineral Flakes
Kieserite mineral flakes are produced by crushing and screening raw ore, resulting in flaked natural magnesium sulphate without chemical alteration. This mechanical processing is within the scope of chapter note 1, so the flakes are classified under tariff item 2530.20.00 as natural magnesium sulphates.