Water Treatment Slaked Lime
Water treatment slaked lime is a high-calcium hydrated lime powder used for pH control, softening, and impurity removal in municipal water treatment. It is classified under tariff item 2522.20.00 as slaked lime, and is not excluded by Chapter 25 notes as it is not a synthetic hydroxide of heading 28.25.
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 synthetic calcium hydroxide produced by chemical processes
Synthetic hydroxides are classified in Chapter 28.
If the product is activated carbon or other water treatment chemicals mixed with lime
Mixed water treatment preparations fall under Chapter 38.
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
• Confirm the product is derived from natural limestone, not synthetic calcium hydroxide, to maintain classification under Chapter 25
• Provide water treatment certifications if required by Canadian health authorities
• Verify the product contains no coagulants or flocculants, which would change classification
Related Products under Tariff item 2522.20.00
Agricultural Hydrated Lime for Soil pH Adjustment
Agricultural hydrated lime is a coarse slaked lime product produced by reacting quicklime with water, used to raise soil pH and supply calcium for crop growth. It falls under tariff item 2522.20.00 as slaked lime, distinct from fertilizers of Chapter 31, and is not processed beyond hydration.
Dolomitic Hydrated Lime
Dolomitic hydrated lime is produced by partially slaking dolomitic quicklime, containing both calcium and magnesium hydroxides. It is classified under tariff item 2522.20.00 as slaked lime, and is not excluded by Chapter 25 notes since it is not a pure calcium oxide or hydroxide of heading 28.25.
Flue Gas Desulfurization Slaked Lime
Flue gas desulfurization slaked lime is a reactive hydrated lime used in scrubbers to remove sulfur dioxide from power plant emissions. It is classified under tariff item 2522.20.00 as slaked lime, provided it is not mixed with other chemical additives that would change its classification.
Food-Grade Slaked Lime for Tortilla Production
Food-grade slaked lime is high-purity calcium hydroxide used in nixtamalization for tortilla production. It is classified under tariff item 2522.20.00 as slaked lime, and is not excluded by Chapter 25 notes despite its food-contact use, as it is not a medicament or cosmetic product.
Hydrated Lime Powder for Construction
Hydrated lime powder for construction is finely ground slaked lime produced by hydrating quicklime, used in mortar and plaster. It is classified under tariff item 2522.20.00 as slaked lime, and is not excluded by Chapter 25 notes since it is not processed beyond hydration and grinding.
Limewash Paint Base Slaked Lime
Limewash paint base slaked lime is a pure slaked lime product in powder or putty form, intended for mixing with pigments to create breathable coatings. It is classified under tariff item 2522.20.00 as slaked lime, and is not excluded by Chapter 25 notes as it is not a prepared paint of Chapter 32.