HS Code for Calcined dolomite

Calcined dolomite is classified under HS code 251820, which specifically describes "Dolomite, calcined or sintered; including dolomite roughly trimmed, or merely cut by sawing or otherwise into blocks or slabs of rectangular (including square) shape." This classification is critical because it distinguishes dolomite that has undergone a significant thermal treatment process (calcination or sintering) from raw, uncalcined dolomite. Calcination involves heating dolomite to high temperatures, which removes carbon dioxide and alters its chemical and physical properties, making it suitable for specialized industrial applications such as refractories, flux in metallurgy, and agricultural soil amendments. The inclusion of roughly trimmed or cut blocks further refines the scope of this code.

Products Included

• Calcined dolomite lumps
• Calcined dolomite powder
• Sintered dolomite
• Dead-burned dolomite
• Dolomite blocks or slabs, merely cut, that have been calcined

Common Misclassification

The most common misclassification for calcined dolomite is with raw, uncalcined dolomite, which falls under HS code 251810, covering "Dolomite, not calcined or sintered." The key distinction lies in the calcination process: 251820 applies only to dolomite that has been heat-treated to alter its chemical composition, while 251810 is for the mineral in its natural state. Incorrectly classifying based on the presence or absence of this thermal processing can lead to significant customs errors. Another potential confusion could arise with HS code 252100, which covers "Limestone flux; limestone and other calcareous stone, of a kind used for the manufacture of lime or cement." While dolomite is a calcareous stone, 252100 is specifically for limestone, not dolomite, and does not account for the calcination process. Furthermore, highly processed articles made from calcined dolomite, such as refractory bricks, would be classified under Chapter 68 or 69, not under 251820, which is for the bulk material.

FAQ

What is the HS code for Calcined dolomite?

The HS code for Calcined dolomite is 251820. This code specifically covers dolomite that has undergone calcination or sintering, distinguishing it from raw dolomite due to its altered chemical and physical properties.

How does calcined dolomite differ from raw dolomite for classification purposes?

Calcined dolomite (251820) has been heat-treated to remove carbon dioxide, changing its chemical composition and properties. Raw dolomite (251810) has not undergone this process and remains in its natural mineral state. This thermal treatment is the defining factor for classification.