HS Code for Fluorspar

Fluorspar with a calcium fluoride content exceeding 97% by weight is classified under HS code 2529.22. This product is a mineral substance classified under Chapter 25, which covers salt, sulfur, earths, and stone. Heading 2529 specifically includes feldspar, leucite, nepheline, and fluorspar. The subheading 2529.22 is reserved for \"acid-grade\" fluorspar, which is defined by its high purity level. This grade is primarily used in the chemical industry for the production of hydrofluoric acid. The classification is strictly dependent on the chemical assay of the material; if the calcium fluoride content is 97% or less, it is classified under 2529.21 (metallurgical grade). The distinction is critical because the two grades serve different industrial purposes and often have different tariff rates. The material must be in its natural state or have undergone only the mechanical processes allowed by Note 1 to Chapter 25, such as crushing, grinding, or flotation, without changing the chemical structure. If the fluorspar has been chemically treated or purified beyond these mechanical means to the point of becoming a pure chemical, it might move to Chapter 28, though most commercial acid-grade fluorspar remains in 2529.22.

Products Included

• Acid-grade fluorspar (>97% CaF2)
• High-purity calcium fluoride mineral
• Ground fluorspar for chemical processing
• Flotation-concentrated fluorspar
• Filter cake fluorspar (acid grade)

Common Misclassification

The most frequent misclassification is using 2529.21 for high-purity fluorspar. Code 2529.21 is strictly for fluorspar containing 97% or less of calcium fluoride (metallurgical or ceramic grade). Another error is classifying it under 2826.12 (Aluminum fluoride) or 2826.19 (Other fluorides) because it is a fluoride; however, as a natural mineral, Chapter 25 takes precedence over Chapter 28 unless the product is a chemically defined compound produced by a chemical process.

FAQ

What is the HS code for acid-grade fluorspar?

The HS code for acid-grade fluorspar (containing more than 97% calcium fluoride) is 2529.22.

How is the purity of fluorspar verified for customs?

Customs authorities typically require a Certificate of Analysis (CoA) showing the percentage of CaF2 by weight to distinguish between subheadings 2529.21 and 2529.22.