Hydrated Lime Powder for Construction
Finely ground slaked lime produced by reacting quicklime with water, used primarily as a mortar additive in bricklaying and plastering. It falls under HTS 2522.20.00.00 as slaked lime, distinct from pure calcium hydroxide preparations in heading 2825. This quicklime-derived product hydrates to form a putty-like consistency for building applications.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If chemically pure calcium hydroxide exceeding 90% purity
Pure hydroxide preparations fall under inorganic chemicals in Chapter 28, not mineral slaked lime.
If unslaked quicklime before hydration
Quicklime is the anhydrous form in the same heading but separate subheading from slaked lime.
If prepared as hydraulic lime with pozzolanic additives
Hydraulic limes with artificial admixtures shift to prepared binders in Chapter 38.
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Import Tips & Compliance
• Verify purity and reactivity through lab testing to confirm classification as slaked lime, not chemical-grade calcium hydroxide
• Include certificates of analysis showing quicklime origin and hydration process to avoid reclassification under 2825
• Ensure packaging labels distinguish from hydraulic lime or cement blends to prevent customs disputes
Related Products under HTS 2522.20.00.00
Slaked Lime Putty for Plastering
Wet slaked lime paste stored in airtight containers for traditional lime plaster walls and decorative finishes. Classified under HTS 2522.20.00.00 as hydrated lime from quicklime, excluding hydraulic variants. Its high plasticity makes it ideal for breathable historic building restoration.
Agricultural Hydrated Lime for Soil pH Adjustment
Coarse slaked lime granules applied to acidic soils to raise pH and supply calcium for crop growth. HTS 2522.20.00.00 covers this quicklime-hydrated product used in farming, separate from Chapter 31 fertilizers. It neutralizes soil acidity without nitrogen or phosphate additives.
Water Treatment Slaked Lime
High-calcium slaked lime powder dosed into water for pH control, softening, and impurity removal in municipal plants. Under HTS 2522.20.00.00 as mineral-derived slaked lime, not synthetic hydroxide of 2825. It reacts to precipitate hardness minerals effectively.
Flue Gas Desulfurization Slaked Lime
Reactive slaked lime injected into power plant scrubbers to capture SO2 emissions, forming gypsum byproduct. HTS 2522.20.00.00 applies to this industrial mineral product from hydrated quicklime. Essential for coal-fired emission controls.
Limewash Paint Base Slaked Lime
Slaked lime in powder or putty form mixed with pigments for breathable limewash coatings on historic buildings. Classified HTS 2522.20.00.00 as pure slaked lime, not Chapter 32 paints. Provides antifungal, vapor-permeable finishes.
Dolomitic Hydrated Lime
Partially slaked dolomitic lime containing magnesium for acid neutralization in steel production and agriculture. HTS 2522.20.00.00 includes this quicklime variant, differentiated from pure hydraulic lime. Offers slower reaction for sustained pH control.