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Harmonized System
U.S. imports of slaked lime (hydrated lime) (HS 252220) totaled $2.6M in July 2026, traded with 20 countries.
Importers of Slaked Lime (Hydrated 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 (Hydrated Lime) imports of $2.6M in July 2026 ran 34% above the year-to-date monthly average of $2.0M.
Last updated: July 2026 dataSlaked lime — calcium hydroxide formed by adding water to quicklime — serves as a cost-effective alkali across water and wastewater treatment, soil stabilization, food processing (nixtamalization), and construction applications. Mexico is the leading US import source, followed by Canada, with the Dominican Republic, Italy, and Thailand also supplying the market. All imports enter under tariff line 2522200000, and food-grade slaked lime used in tortilla or corn processing may be subject to FDA oversight depending on its intended end use.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
406 shipments/mo
The key distinction is chemical form: quicklime is calcium oxide (CaO), while slaked lime is calcium hydroxide Ca(OH)₂, produced by hydrating quicklime. Importers should ensure the product's chemical specification and processing documentation clearly reflect the hydrated form to support classification under 2522200000 rather than 2522100000.
Yes. Slaked lime intended for food use — such as in nixtamalization of corn — may be subject to FDA review as a food additive or processing aid. Importers should confirm the product meets applicable food-grade specifications and consult a licensed customs broker or regulatory specialist regarding FDA prior notice and admissibility requirements.
HSChapter 25
Subheading 2 of 3 in heading 2522
Subheading 252220 · $2.6M of $8.9M
Supplier Network
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ImportsExports
Imports
$2.6MYoY · Pro
Exports
$856KYoY · Pro
12-mo low · imports
YoY · ProThrough July 2026. Source: U.S. Census Bureau.
HS10 import codes under this HS6 parent, each with its own page. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Dutiable Share | Duty Collected |
|---|---|---|---|---|---|
| 2522200000 | Slaked Lime | $2.6M | 1.87% | 17.82% | $49K |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 2522200000 | Slaked Lime | $856K |
Import lines come from the U.S. Harmonized Tariff Schedule and export lines from Schedule B. The two are numbered by different agencies, so the same 10-digit code can appear in both tables describing a different product.
Imports · July 2026
origin
Canada and Mexico together supply 82% of it.
customs district
destination
entry
rate provision · imports
82.2% enters free of duty; the effective duty rate is 1.87%.