Quicklime, slaked lime and hydraulic lime, other than calcium oxide and hydroxide of heading 2825
3 declarable lines
Heading 2522 covers quicklime, slaked lime and hydraulic lime, except calcium oxide or hydroxide classifiable in heading 2825. It has three declarable lines: quicklime, slaked lime and hydraulic lime, and all three carry a general (MFN) rate of Free.
Products in this heading
- Quicklime (calcium oxide) in lumps or powder
- Slaked lime (calcium hydroxide)
- Hydrated lime for soil pH adjustment
- Hydraulic lime for masonry mortar
- Lime putty for plaster and mortar
- Builder's lime for mortar mixes
- Finishing lime for plaster
- Quicklime for water treatment or steelmaking
How to choose the right subheading
- Determine whether the product is calcium oxide (quicklime), calcium hydroxide (slaked or hydrated lime), or a lime that sets hydraulically.
- Check whether the lime is a calcium oxide or hydroxide of heading 2825; if so, it is excluded from 2522.
- Confirm it is not a cement or gypsum plaster, which are classified in other headings.
- Confirm the material is lime, not raw or calcined dolomite or another stone product.
- Use the chemical type first, then the product form and end use, to select the 2522 line.
Often confused with
- Heading 2523Portland cement
Hydraulic cements belong to heading 2523, not 2522.
- Heading 2520Gypsum plaster
Plasters based on calcined gypsum are classified in heading 2520.
- Heading 2825Chemically pure calcium oxide or calcium hydroxide
Heading 2522 excludes calcium oxide and hydroxide of heading 2825.
- Heading 2518Dolomite
Dolomite, whether or not calcined or sintered, is in heading 2518.
Frequently asked questions
What is the HTS code for quicklime?
Quicklime is classified under 2522.10.00.00. Its general (MFN) duty rate is Free.
What is the duty on slaked lime?
Slaked lime is classified under 2522.20.00.00. The general (MFN) duty rate is Free.
How do I classify hydraulic lime?
Use 2522.30.00.00 for hydraulic lime. The general (MFN) duty rate is Free; cement products are classified in heading 2523.
Guide written from the official schedule text. Rates quoted are general (MFN) rates; check the line page for trade agreement rates and the classification of your exact product.