Product classification
HS code for Slaked lime: 2522.20
Slaked lime, excluding calcium oxide and hydroxide of heading no. 2825.
Classification of slaked lime under HS 2522.20
Slaked lime, also known as hydrated lime or calcium hydroxide, is classified under HS code 2522.20. This classification is part of Heading 2522, which encompasses quicklime, slaked lime, and hydraulic lime obtained by the calcination of limestone. Slaked lime is specifically produced by the hydration of quicklime (calcium oxide). The classification under Chapter 25 is appropriate for industrial or commercial grade slaked lime used in construction, agriculture, or water treatment. It is important to distinguish this from chemically pure calcium hydroxide, which is classified in Chapter 28. The presence of impurities typical of the mineral source and the standard industrial production process keeps this product within the scope of Chapter 25, as it is considered a mineral product rather than a separate chemically defined compound.
- Covers
- Hydrated lime
- Commercial calcium hydroxide
- Builders' slaked lime
- Agricultural hydrated lime
- Pickling lime (industrial grade)
- Also under 2522.20
- Carmeuse hydrated lime
- Graymont hydrated lime
- Lhoist hydrated lime
- Mississippi Lime hydrated lime
Codes often confused with 2522.20
Common mistake. Slaked lime is frequently misclassified under 2825.90, which is the code for chemically pure calcium hydroxide. It is also often confused with 2522.10, which is the code for quicklime (calcium oxide). Another error involves 2522.30, which is reserved for hydraulic lime, a product that sets under water.
Top exporters and importers of HS 252220 (the code used for slaked lime), 2025
In 2025, the largest exporter of HS 252220 (the code used for slaked lime) in UN Comtrade data was Germany, with 13% of world exports; the largest importer in UN Comtrade data was France, with 11% of world imports. Countries that did not report 2025 data are estimated from partner records, which can understate them.
Figures cover everything classified under HS 252220, not only slaked lime.
Top exporters 2025 · share of world exports
- 1 Germany $33M 13% of world exports
- 2 United Kingdom $23M 8.8% of world exports
- 3 Belgium $22M 8.2% of world exports
World total: $263M Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 France $30M 11% of world imports
- 2 Netherlands $25M 9.1% of world imports
- 3 United States $23M 8.3% of world imports
World total: $277M Reported figures on UN Comtrade ↗
How these figures are built
109 countries reported 2025 trade to UN Comtrade in HS 2022, and their own totals are used. Countries that did not report are estimated from what other countries recorded trading with them. Those estimates miss trade with other non-reporting countries, so they can be low, and a non-reporting country can rank higher than shown or be missing from the list. World totals add both and leave out trade between two non-reporting countries. Figures are in current US dollars; reported imports are mostly valued CIF and exports FOB, and exports include re-exports. The UN Comtrade links show the underlying records; they can also list a few reporters left out here (regional groups and older HS editions).
Source: UN Comtrade (United Nations Statistics Division), 2025 annual data.
Brazil NCM code for slaked lime
Brazil classifies slaked lime under NCM 2522.20.00: HS 2522.20 with 00 added.
Source: Siscomex NCM table, updated Oct 2026. The Portuguese text on each NCM page is the official one.
Questions about slaked lime
What is the HS code for Slaked lime?
The HS code for Slaked lime is 252220 (Slaked lime; excluding calcium oxide and hydroxide of heading no. 2825). The HS code for commercial or industrial slaked lime is 2522.20.
How do I classify Slaked lime for customs?
Slaked lime is classified under HS code 252220 — Slaked lime; excluding calcium oxide and hydroxide of heading no. 2825. This is a 6-digit subheading level code.
Is slaked lime the same as quicklime in the HS system?
No, they are different. Quicklime is classified under 2522.10, while slaked (hydrated) lime is classified under 2522.20.
Which countries are the top exporters of slaked lime (HS 252220)?
In 2025, the top exporters of HS 252220 (the code used for slaked lime) in UN Comtrade data were Germany ($33M, 13% of world exports), the United Kingdom ($23M) and Belgium ($22M). World exports came to about $263M, adding countries' reported figures and partner-based estimates for those that did not report (UN Comtrade data). Countries that did not report 2025 data are estimated from partner records, which can understate them.
Which countries are the top importers of slaked lime (HS 252220)?
In 2025, the top importers of HS 252220 (the code used for slaked lime) in UN Comtrade data were France ($30M, 11% of world imports), the Netherlands ($25M) and the United States ($23M). World imports came to about $277M, adding countries' reported figures and partner-based estimates for those that did not report (UN Comtrade data). Countries that did not report 2025 data are estimated from partner records, which can understate them.
Is the HS code for Slaked lime the same in all countries?
The base HS code 252220 for Slaked lime is internationally standardized for the first 6 digits across 200+ countries. Individual countries may add additional digits for national tariff lines and specific classifications.
What is the NCM code for slaked lime in Brazil?
In Brazil, slaked lime (HS 252220) is classified under NCM 2522.20.00.