HS code · 6-digit subheading

HS Code 2518.10 – Dolomite, not calcined or sintered; including dolomite roughly trimmed, or merely cut by sawing or otherwise into blocks or slabs of rectangular (including square) shape

HS code 2518.10 is the 6-digit subheading for dolomite, not calcined or sintered, including dolomite roughly trimmed, or merely cut by sawing or otherwise into blocks or slabs of rectangular (including square) shape. It is used for raw dolomite lumps, crushed dolomite aggregate, dolomite sand, dolomite blocks and dolomite slabs.

What HS 2518.10 covers

This code covers raw, unprocessed dolomite, a common carbonate mineral composed of calcium magnesium carbonate. In international trade, it's primarily exchanged as a bulk commodity for industrial applications. Major importers are typically countries with robust construction, steel, glass, and agricultural sectors that require this mineral as a raw material. Exporters are often nations with significant natural dolomite deposits and the infrastructure for quarrying and transportation. Key things to know include its use as an aggregate in concrete, a flux in metallurgy (especially steelmaking), a source of magnesium in agriculture (soil conditioner), and as a raw material for glass and ceramics. Its uncalcined state means it hasn't undergone high-temperature processing, distinguishing it from its calcined counterpart and making it suitable for applications where its chemical stability is preferred or further processing is done domestically. The trade volume is substantial, driven by global industrial demand.

Covers
  • Raw dolomite lumps
  • Crushed dolomite aggregate
  • Dolomite sand
  • Dolomite blocks
  • Dolomite slabs
  • Agricultural dolomite powder
  • Glass-grade dolomite
Examples
  • Carmeuse Dolomite
  • Graymont Dolomite
  • R.W. Sidley Dolomite
  • US Aggregates Dolomite

Codes often confused with 2518.10

Common mistake. This code is often confused with 251820 (calcined or sintered dolomite) because both are dolomite, but the key distinction is the processing state. It can also be confused with 252100 (limestone flux) if its primary use as a flux is emphasized, but dolomite has a distinct chemical composition.

2518.20Dolomite, calcined or sintered; including dolomite roughly trimmed, or merely cut by sawing or otherwise into blocks or slabs of rectangular (including square) shape2521.00Limestone flux; limestone and other calcareous stone, of a kind used for the manufacture of lime or cement

Top exporters and importers of HS code 251810, 2025

In 2025, the largest exporter of HS code 251810 in UN Comtrade data was Bhutan, with 17% of world exports; the largest importer in UN Comtrade data was India, with 25% of world imports. Countries that did not report 2025 data are estimated from partner records, which can understate them.

Top exporters 2025 · share of world exports

  1. 1 Bhutan $53M
  2. 2 United Arab Emirates* ~$39M
  3. 3 Spain $23M

World total: $309M Reported figures on UN Comtrade ↗

Top importers 2025 · share of world imports

  1. 1 India $126M
  2. 2 Japan $67M
  3. 3 China $51M

World total: $499M 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 marked * did not, so their figures add up what other countries recorded trading with them, and their exports are valued at buyers' CIF prices. 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 2518.10

Brazil does not split HS 2518.10: its NCM code is 2518.10.00.

  1. 2518.10.00 Dolomite, not calcined or sintered (crude)Dolomita não calcinada nem sinterizada, denominada "crua"

All Brazil NCM codes in heading 25.18 →

Source: Siscomex NCM table, updated Oct 2026. The Portuguese text is official; the English is our translation.

Questions about HS 2518.10

What is HS code 251810?

HS code 251810 is a 6-digit subheading in the Harmonized System that covers: Dolomite, not calcined or sintered; including dolomite roughly trimmed, or merely cut by sawing or otherwise into blocks or slabs of rectangular (including square) shape. This code covers raw, unprocessed dolomite, a common carbonate mineral composed of calcium magnesium carbonate. In international trade, it's primarily exchanged as a bulk commodity for industrial applications. Major importers are typically countries with robust construction, steel, glass, and agricultural sectors that require this mineral as a raw material. Exporters are often nations with significant natural dolomite deposits and the infrastructure for quarrying and transportation. Key things to know include its use as an aggregate in concrete, a flux in metallurgy (especially steelmaking), a source of magnesium in agriculture (soil conditioner), and as a raw material for glass and ceramics. Its uncalcined state means it hasn't undergone high-temperature processing, distinguishing it from its calcined counterpart and making it suitable for applications where its chemical stability is preferred or further processing is done domestically. The trade volume is substantial, driven by global industrial demand.

What products fall under HS code 251810?

Raw dolomite lumps, Crushed dolomite aggregate, Dolomite sand, Dolomite blocks, Dolomite slabs, Agricultural dolomite powder, Glass-grade dolomite

What are common misclassifications for HS code 251810?

This code is often confused with 251820 (calcined or sintered dolomite) because both are dolomite, but the key distinction is the processing state. It can also be confused with 252100 (limestone flux) if its primary use as a flux is emphasized, but dolomite has a distinct chemical composition.

Which countries are the top exporters of goods under HS code 251810?

In 2025, the top exporters of HS code 251810 in UN Comtrade data were Bhutan ($53M, 17% of world exports), the United Arab Emirates (about $39M) and Spain ($23M). World exports came to about $309M, 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 goods under HS code 251810?

In 2025, the top importers of HS code 251810 in UN Comtrade data were India ($126M, 25% of world imports), Japan ($67M) and China ($51M). World imports came to about $499M, 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.

How is HS code 251810 structured?

HS code 251810 is a 6-digit subheading under the Harmonized System. The first 2 digits (25) identify the chapter, digits 3-4 (18) identify the heading, and digits 5-6 (10) specify the subheading. This code is standardized globally by the World Customs Organization.

What is the Brazil NCM code for HS code 251810?

In Brazil, HS code 251810 is NCM 2518.10.00. The last two digits are 00 because Brazil does not split this HS code further.