HS Code for Plaster of Paris

Plaster of Paris is classified under HS code 2520.20 because it is a mineral product consisting of calcined gypsum or calcium sulphate. Chapter 25 of the Harmonized System covers salt, sulfur, earths, and stone, including plastering materials. Heading 2520 specifically addresses gypsum and anhydrite. The subheading 2520.20 is designated for \"plasters,\" which are defined as gypsum that has been dehydrated (calcined) to form a fine powder that hardens when mixed with water. This classification applies even if the plaster contains small quantities of accelerators (to speed up setting) or retarders (to slow it down), or if it has been colored for specific industrial or artistic uses. The essential character of the product remains a mineral-based plastering material derived from the processing of natural gypsum.

Products Included

• Calcined gypsum powder
• Dental plaster (non-specialized)
• Artistic casting plaster
• Construction-grade Plaster of Paris
• Dehydrated calcium sulphate for building use

Common Misclassification

A common misclassification occurs with HS code 2520.10, which is strictly for crude gypsum or anhydrite that has not been calcined. Once the material undergoes the heating process to become Plaster of Paris, it must move to 2520.20. Another frequent error involves HS code 3214.10, which covers painters' fillings and non-refractory surfacing preparations; while Plaster of Paris is used in construction, it is a base material rather than a prepared mastic or filler. Finally, specialized medical or dental plasters that are prepared for specific surgical uses may fall under 3006.40.

FAQ

What is the HS code for Plaster of Paris?

The standard HS code for Plaster of Paris (calcined gypsum) is 2520.20.

Is Plaster of Paris classified differently if it is colored?

No, HS code 2520.20 specifically includes plasters whether or not they are colored, provided they consist of calcined gypsum.