HS Code for Witherite

Witherite is a naturally occurring mineral form of barium carbonate and is classified under HS code 2511.20. Chapter 25 of the Harmonized System covers salt, sulfur, earths, and stone, as well as plastering materials, lime, and cement. Heading 2511 specifically includes natural barium sulfate (barytes) and natural barium carbonate (witherite). The classification of witherite under 2511.20 is appropriate because it is a natural mineral product that has not been chemically processed beyond what is allowed in Chapter 25. According to the Chapter 25 notes, products may be washed, crushed, ground, powdered, levigated, sifted, screened, or concentrated by flotation or other mechanical or physical processes, but they cannot be chemically altered. Witherite may also be calcined (heated to high temperatures) and still remain within this heading. This classification distinguishes the natural ore from the chemically produced barium carbonate, which is classified in Chapter 28.

Products Included

• Natural witherite ore
• Crushed or ground witherite
• Calcined natural witherite
• Witherite concentrates
• Powdered natural barium carbonate

Common Misclassification

Witherite is often misclassified under HS code 2836.60, which covers barium carbonate. However, Chapter 28 is reserved for pure chemical elements and compounds that are chemically defined. If the barium carbonate is synthetic or chemically precipitated, it belongs in 2836.60. If it is the natural mineral ore, it must be classified in 2511.20. Another common error is confusing it with barytes (natural barium sulfate), which is classified under 2511.10.

FAQ

What is the HS code for witherite?

The HS code for natural witherite (barium carbonate) is 2511.20.

Can calcined witherite still be classified under 2511.20?

Yes, the Explanatory Notes to Chapter 25 allow for certain thermal treatments like calcination for natural minerals without changing their classification to a chemical heading.