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HSChapter 25
U.S. imports of slaked lime (hydrated lime) (HS 252220) totaled $2.1M in April 2026, traded with 19 countries.
Importers of Slaked Lime (Hydrated Lime) paid $49K in duties in April 2026 — an effective duty rate of 10% on $464K in dutiable value, based on actual customs collections rather than the published tariff schedule. Slaked Lime (Hydrated Lime) imports of $2.1M in April 2026 ran 31% above the year-to-date monthly average of $1.6M.
Last updated: April 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.
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.
| Country | Imports | Exports | Balance |
|---|---|---|---|
| CANADA | $795K | $504K | -$291K |
| MEXICO | $801K | $30K | -$771K |
| DOMINICAN REPUBLIC | $130K | -- | -$130K |
| BELGIUM | $77K | -- | -$77K |
| ITALY | $76K | -- | -$76K |
Monthly import values over time
HS10 import codes under this HS6 parent. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Duty Collected |
|---|---|---|---|---|
| 2522200000 | SLAKED LIME | $2.1M | 10.49% | $49K |
SLAKED LIME
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 2522200000 | SLAKED LIME | $701K |
SLAKED LIME
2.0M kg
PORTLAND CEMENT EXCEPT WHITE PORTLAND CEMENT
HS 252329
SULFUR OF ALL KINDS, NOT SUBLIMED,PRECIP,COLLOIDAL
HS 250300
SALT INCL TBL/DENTRD, PURE SODM CHLOR ETC; SEA WTR
HS 250100
UNGRND NAT CAL PHSPH, ALUM CAL PHOS A PHOS CHALK
HS 251010
FLUORSPAR OV 97% OF CALCIUM FLUORD BY WGHT
HS 252922
PEBBLES, GRAVEL ETC. FOR CONCRETE AGGREGATES ETC.
HS 251710
Supplier Network
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| State | Imports | Exports | Balance |
|---|---|---|---|
| Texas | $915K | $103K | -$812K |
| Washington | $563K | $8K | -$555K |
| Wisconsin | -- | $324K | +$324K |
| Port | Imports | Exports | Balance |
|---|---|---|---|
| EAGLE PASS, TX | $340K | $9K | -$331K |
| LAREDO, TX | $335K | $13K | -$322K |
| BLAINE, WA | $323K | $15K | -$308K |