HS Code for Anhydrite

Anhydrite is classified under HS code 2520.10, located within Chapter 25, which covers salt, sulfur, earths, and stone, as well as plastering materials, lime, and cement. Heading 2520 specifically encompasses gypsum, anhydrite, and plasters. The subheading 2520.10 covers both gypsum and anhydrite in their natural, unworked state. Anhydrite is a mineral composed of anhydrous calcium sulfate (CaSO4), distinguishing it from gypsum, which is hydrous calcium sulfate. In the context of international trade, this code applies to the mineral as it is extracted from the earth, including when it has been crushed, ground, or powdered, provided it has not been calcined or further processed into plaster. Its classification is based on its chemical composition as a naturally occurring mineral sulfate and its status as a raw material for the construction and chemical industries. It is frequently used as a soil conditioner or as a setting retarder in Portland cement.

Products Included

• Natural anhydrite mineral
• Crushed anhydrite rock
• Powdered natural calcium sulfate (anhydrous)
• Lump anhydrite for industrial use

Common Misclassification

Anhydrite is often confused with 2520.20, which is the code for plasters (calcined gypsum or anhydrite). It can also be misclassified under 2833.29, which covers chemical-grade sulfates. However, if the product is a naturally occurring mineral, Chapter 25 is the correct location rather than the chemical chapter.

FAQ

What is the HS code for anhydrite?

Natural anhydrite is classified under HS code 2520.10, which it shares with natural gypsum.

Is synthetic anhydrite classified here?

No, synthetic calcium sulfate produced as a byproduct of chemical processes is generally classified under HS code 2833.29 rather than the mineral code 2520.10.