Clays; (not including expanded clays of heading no. 6806), andalusite kyanite and sillimanite, whether or not calcined; mullite; chamotte or dinas earth
In plain English
This section covers various types of clays, andalusite, kyanite, sillimanite, mullite, and chamotte or dinas earths, while explicitly excluding expanded clays. The items are categorized based on their specific type, such as bentonite, fireclay, or other clays not listed elsewhere in this group. Additional distinctions are made for minerals like andalusite, kyanite, and sillimanite, as well as for mullite and chamotte or dinas earths. Some of these materials may be calcined or remain uncalcined.
6-digit subheadings (6)
Official HS 2022 subheading texts. National tariff schedules subdivide these further (8-10 digit lines) and set the actual duty rates.
Clays (excluding expanded clays of heading no. 6806); bentonite, whether or not calcined
Clays (excluding expanded clays of heading no. 6806); fireclay, whether or not calcined
Clays (excluding expanded clays of heading no. 6806); n.e.c. in heading no. 2508, whether or not calcined
Clays (excluding expanded clays of heading no. 6806); andalusite, kyanite and sillimanite, whether or not calcined
Clays (excluding expanded clays of heading no. 6806); mullite
Clays (excluding expanded clays of heading no. 6806); chamotte or dinas earths
Chapter 25 classification notes
Frequent misclassification in this chapter
Worked marble / granite goes to Chapter 68 (articles of stone) not 25; raw blocks stay in 25.
Classification certainty
The 6-digit level shown here is the internationally harmonised layer. Duty rates attach to national 8-10 digit tariff lines, which differ by country — use the duty calculator for lane estimates. For binding certainty, request a ruling from the destination customs authority.
Binding tariff ruling databaseOther headings in Chapter 25
- 2501 — Salt (including table salt and denatured salt); pure sodium chloride w…
- 2502 — Iron pyrites; unroasted
- 2503 — Sulphur of all kinds; other than sublimed, precipitated and colloidal …
- 2504 — Graphite; natural
- 2505 — Sands of all kinds; natural, whether or not coloured, other than metal…
- 2506 — Quartz; (other than natural sands), quartzite, whether or not roughly …
- 2507 — Kaolin and other kaolinic clays; whether or not calcined
- 2509 — Chalk
- 2510 — Natural calcium phosphates; natural aluminium calcium phosphates and p…
- 2511 — Natural barium sulphate (barytes); natural barium carbonate, (witherit…
- 2512 — Siliceous fossil meals (e.g. kieselguhr, tripolite and diatomite) and …
- 2513 — Pumice stone; emery; natural corundum, natural garnet and other natura…
- 2514 — Slate, whether or not roughly trimmed or merely cut, by sawing or othe…
- 2515 — Marble, travertine, ecaussine and other calcareous stone; of an appare…
- 2516 — Granite, porphyry, basalt, sandstone, other monumental and building st…
- 2517 — Pebbles, gravel, crushed stone for concrete aggregates for road or rai…
- 2518 — Dolomite, whether or not calcined or sintered, including dolomite roug…
- 2519 — Natural magnesium carbonate (magnesite); fused magnesia; dead-burned (…
- 2520 — Gypsum; anhydrite; plasters (consisting of calcined gypsum or calcium …
- 2521 — Limestone flux; limestone and other calcareous stone, of a kind used f…
- 2522 — Quicklime, slaked lime and hydraulic lime; other than calcium oxide an…
- 2523 — Portland cement, aluminous cement (ciment fondu), slag cement, supersu…
- 2524 — Asbestos
- 2525 — Mica, including splittings; mica waste
- 2526 — Natural steatite; whether or not roughly trimmed or merely cut, by saw…
- 2528 — Natural borates and concentrates thereof (whether or not calcined), bu…
- 2529 — Feldspar; leucite; nepheline and nepheline syenite; fluorspar
- 2530 — Mineral substances not elsewhere specified or included