Quicklime — HTS 2522
Quicklime, slaked lime and hydraulic lime, other than calcium oxide and hydroxide of heading 2825
Chapter 25 › Heading 2522
2026 HTS Rev 19 Synced Rules verified Operational
Written to help non-specialists understand this page. Rates, dates, and legal facts come from the official records above and on the linked source.
HTS heading 2522 is a 4-digit product category for certain forms of lime: quicklime, slaked lime, and hydraulic lime. In plain language, it generally covers lime products used as materials, including calcium-based mineral products that fit these descriptions, but it excludes calcium oxide and calcium hydroxide classified in heading 2825.
To reach the correct 8-digit HTS code, first identify the product’s lime type and physical or commercial form, then compare those facts with the subheadings and statistical provisions under heading 2522. The final digits commonly distinguish the material or type of lime and may depend on how the product is described in technical documents. Classification can require customs-broker or other professional judgment when the product is blended, specially treated, or potentially covered by heading 2825.
What to check
- Confirm whether the product is quicklime, slaked lime, or hydraulic lime using the manufacturer’s technical description and composition data.
- Check whether the product is instead calcium oxide or calcium hydroxide covered by heading 2825, rather than assuming every lime product belongs in heading 2522.
- Review the full 8-digit HTS provisions under heading 2522 and match the product’s named type, composition, and form to the wording.
- Keep the safety data sheet, specification sheet, certificate of analysis, and manufacturing description available to support the classification.
- Ask a customs broker or request a formal classification ruling if the product is a mixture, additive-treated material, or its chemical identity is unclear.
HTS heading 2522 summary
Quicklime is a 4-digit product category containing 3 published product-code lines in this snapshot. A heading does not carry one universal duty rate; classification must be narrowed to the line matching the product facts.
How to find your code in this category
A heading is a product category. To get the exact duty, narrow from this 4-digit heading to a sub-category (usually by material), then open the 8-digit code that matches your product.
Open any code in the tables below to see its exact duty rate, a duty calculator (enter your shipment value → estimated duty and landed cost), the rate-change history chart, and the country-by-country breakdown (including Section 301/232 add-on duties).
Why you have to click in: a single category can contain products with very different duties. The rate depends on the specific product — its material and construction — and on the country of origin, and those only get pinned down at the 8-digit code level. That is why this page points you to codes instead of showing one rate for the whole category.
Product codes & duty rates
👇 Each row is a specific product code — click a blue code to open its full page with exact duty rates by country, the rate-history chart, and a duty calculator. 👉
| Code | Description | General (MFN) | Special | Column 2 |
|---|---|---|---|---|
| 2522.10.00.00 👉 | Quicklime | Free | — | 0.2¢/kg, including weight of container |
| 2522.20.00.00 👉 | Slaked lime | Free | — | 0.3¢/kg, including weight of container |
| 2522.30.00.00 👉 | Hydraulic lime | Free | — | 0.2¢/kg, including weight of container |
"Special" shows the free-trade-agreement rate; open a code to see exactly which countries qualify.
Common questions
What products fall under HTS heading 2522?
Quicklime, slaked lime and hydraulic lime, other than calcium oxide and hydroxide of heading 2825. To classify a specific item you must pick the matching sub-category and 8-digit code above; the right choice usually depends on the material and construction of the product.
How do I choose the right code within this category?
Start from the sub-categories (typically divided by material—for example cotton versus man-made fibers), then open the active 8- or 10-digit code that matches the product. When unsure, a licensed customs broker or a CBP binding ruling can confirm the classification.
Reference information only, not customs, legal, or classification advice. Confirm the current code and rate against the official HTS before you import.