U.S. imports of Slaked Lime (SITC 66112) totaled $2.5M in August 2026, imported from 20 countries.
Importers of Slaked Lime paid $52K in duties in August 2026, an average duty rate of 2.07% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule. Slaked Lime imports of $2.5M in August 2026 ran 24% above the year-to-date monthly average of $2.0M.
Last updated: August 2026 dataCalcium hydroxide — commercially known as slaked or hydrated lime — is formed by reacting quicklime with water and serves as a workhorse alkali across water and wastewater treatment, paper manufacturing, food processing, and construction applications. Its relatively lower reactivity compared to quicklime makes it easier to handle and store, though moisture control during transit remains important to prevent premature carbonation. Purity grade and particle size distribution are the primary specification variables that determine suitability for food-contact versus industrial uses.
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401 import shipments a month
When slaked lime is imported for food-contact applications — such as nixtamalization in corn processing — it may be subject to FDA review as a food additive or processing aid. Importers should ensure the product meets applicable food-grade purity standards (e.g., FCC grade) and that the supplier's documentation reflects the intended food-contact use.
Food-grade calcium hydroxide must meet strict limits on heavy metals (lead, arsenic, mercury) and other impurities as defined by the Food Chemicals Codex (FCC). Industrial grades may have broader tolerances for these contaminants. Importers should request a Certificate of Analysis confirming compliance with the applicable grade standard for their end use.
Basic heading 66112 · $2.5M of $27.0B
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Imports · August 2026
origin
Canada and Mexico together supply 81% of it. Dominican Republic pays 12.5% duty; Canada 0.0%.
customs district
Census does not publish district detail for this classification system.
destination
Census does not publish state detail for this classification system.
entry
Census does not publish port detail for this classification system.
ImportsExports
Imports
$2.5MYoY · free account
Exports
$603KYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $23.1M of Slaked Lime and exported $6.8M.
Through August 2026. Source: U.S. Census Bureau.