WCO Trade Tools provides essential information to support your trade activity.
Harmonized System
Section V > Chapter 25 > Heading 2528 > 2528.00
Natural borates and concentrates thereof (whether or not calcined), but not including borates separated from natural brine; natural boric acid containing not more than 85 % of H3BO3 calculated on the dry weight
Section V > Chapter 25 > Heading 2529
Feldspar; leucite, nepheline and nepheline syenite; fluorspar.
Section V > Chapter 25 > Heading 2529 > 2529.2 > 2529.21
Containing by weight 97 % or less of calcium fluoride
Section V > Chapter 25 > Heading 2529 > 2529.2 > 2529.22
Containing by weight more than 97 % of calcium fluoride
Section V > Chapter 25 > Heading 2529 > 2529.30
Leucite; nepheline and nepheline syenite
Section V > Chapter 25 > Heading 2530
Mineral substances not elsewhere specified or included.
Section V > Chapter 25 > Heading 2530 > 2530.10
Vermiculite, perlite and chlorites, unexpanded
Section V > Chapter 25 > Heading 2530 > 2530.20
Kieserite, epsomite (natural magnesium sulphates)