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SITCSection 6
U.S. imports of slaked lime (SITC 66112) totaled $2.6M in July 2026, traded with 20 countries.
Importers of Slaked Lime paid $49K in duties in July 2026 — an effective duty rate of 10% on $468K in dutiable value, based on actual customs collections rather than the published tariff schedule. Slaked Lime imports of $2.6M in July 2026 ran 34% above the year-to-date monthly average of $2.0M.
Last updated: July 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.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
406 shipments/mo
Basic heading 492 of 766 in section 6
Basic heading 66112 · $2.6M of $26.7B
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.
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Imports · July 2026
origin
Canada and Mexico together supply 82% of it.
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
$2.6MYoY · Pro
Exports
$856KYoY · Pro
12-mo low · imports
YoY · ProThrough July 2026. Source: U.S. Census Bureau.