Slaked lime
Quicklime, slaked lime and hydraulic lime, other than calcium oxide and hydroxide of heading 2825: > Slaked lime
Duty Rate (from China)
Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
Except as provided in headings 9903.88.13, 9903.88.18, 9903.88.33, 9903.88.34, 9903.88.35, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.41, 9903.88.43, 9903.88.45, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(e) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(f)
Products classified under HTS 2522.20.00.00
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.
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.
Food-Grade Slaked Lime for Tortilla Production
USP-grade slaked lime (calcium hydroxide) for nixtamalization of corn in tortilla and masa production. Under HTS 2522.20.00.00 as mineral slaked lime safe for food contact, not Chapter 28 pharma chemicals. Releases bound nutrients during alkaline cooking.