Product classification
HS code for Dinas earth: 2508.70
Clays (excluding expanded clays of heading no. 6806), chamotte or dinas earths.
Classification of dinas earth under HS 2508.70
Dinas earth is classified under HS code 2508.70. This classification falls within Chapter 25, which covers salt, sulfur, earths, and stone, as well as plastering materials, lime, and cement. Heading 2508 is the general category for "Other clays," excluding expanded clays of heading 6806. Subheading 2508.70 specifically covers chamotte or dinas earths. Dinas earth is a highly refractory material characterized by its exceptionally high silica content (often exceeding 95%). It is primarily used in the manufacture of refractory bricks and linings for high-temperature industrial furnaces, such as those used in steel and glass production. The classification is based on the mineralogical nature of the earth as a refractory clay and its state as a raw or calcined material that has not yet been manufactured into finished articles.
- Covers
- Raw dinas earth
- Calcined dinas earth
- High-silica refractory clay
- Dinas clay for furnace linings
- Crushed or ground dinas earth
- Also under 2508.70
- RHI Magnesita (refractory materials)
- Vesuvius (refractory products)
- HarbisonWalker International (HWI)
- Resco Products
- Krosaki Harima.
Codes often confused with 2508.70
Common mistake. Dinas earth is often misclassified under 2507.00, which is reserved for kaolin and other kaolinic clays. While both are clays, their mineral compositions and industrial applications differ significantly. Another common error is classifying it under 3816.00, which covers refractory cements and mortars. If the dinas earth is a simple earth or clay, it belongs in 2508.70; if it has been mixed with binders or other materials to form a prepared refractory mortar, it moves to 3816.00. It should also not be confused with silica sand (2505.10), despite its high silica content.
Top exporters and importers of HS 250870 (the code used for dinas earth), 2025
In 2025, the largest exporter of HS 250870 (the code used for dinas earth) in UN Comtrade data was France, with 21% of world exports; the largest importer in UN Comtrade data was Germany, with 19% 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 250870, not only dinas earth.
Top exporters 2025 · share of world exports
- 1 France $15M 21% of world exports
- 2 Germany $13M 17% of world exports
- 3 Czechia $12M 17% of world exports
World total: $74M Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 Germany $19M 19% of world imports
- 2 Türkiye $13M 13% of world imports
- 3 Netherlands $9.4M 9.7% of world imports
World total: $97M 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 dinas earth
Brazil classifies dinas earth under NCM 2508.70.00: HS 2508.70 with 00 added.
Source: Siscomex NCM table, updated Oct 2026. The Portuguese text on each NCM page is the official one.
Questions about dinas earth
What is the HS code for Dinas earth?
The HS code for Dinas earth is 250870 (Clays (excluding expanded clays of heading no. 6806); chamotte or dinas earths). The HS code for Dinas earth is 2508.70, which also includes chamotte earth.
How do I classify Dinas earth for customs?
Dinas earth is classified under HS code 250870 — Clays (excluding expanded clays of heading no. 6806); chamotte or dinas earths. This is a 6-digit subheading level code.
Is dinas earth the same as silica sand?
No. While both are high in silica, dinas earth is a specific type of refractory clay classified under 2508.70, whereas silica sand is classified under 2505.10.
Which countries are the top exporters of dinas earth (HS 250870)?
In 2025, the top exporters of HS 250870 (the code used for dinas earth) in UN Comtrade data were France ($15M, 21% of world exports), Germany ($13M) and Czechia ($12M). World exports came to about $74M, 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 dinas earth (HS 250870)?
In 2025, the top importers of HS 250870 (the code used for dinas earth) in UN Comtrade data were Germany ($19M, 19% of world imports), Türkiye ($13M) and the Netherlands ($9.4M). World imports came to about $97M, 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 Dinas earth the same in all countries?
The base HS code 250870 for Dinas earth 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 dinas earth in Brazil?
In Brazil, dinas earth (HS 250870) is classified under NCM 2508.70.00.