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.
Natural steatite, whether or not roughly trimmed or merely cut, by sawing or otherwise, into blocks or slabs of a rectangular (including square) shape; talc. > 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. > 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.
Duty Rate (from China)
Products classified under Tariff item 2528.00.00.00
Anhydrous Borax Concentrate
Anhydrous borax concentrate produced by calcining natural tincal or kernite ores, resulting in dehydrated sodium borate suitable for welding fluxes. This product falls under tariff item 2528.00.00 as a calcined natural borate derived from solid mineral deposits, not from natural brine.
2528.00.00Calcined Colemanite Borate Ore
Calcined colemanite ore, a naturally occurring calcium borate mineral mined in Turkey, processed by heating to remove moisture while preserving borate content. It is classified under tariff item 2528.00.00 as a natural borate concentrate, not separated from brine.
2528.00.00Calcined Sodium Borate Flux Grade
Calcined sodium borate flux grade, a concentrate of natural sodium borates processed for use as a flux in glassmaking and enameling industries. This product falls under tariff item 2528.00.00 as a calcined natural sodium borate from mineral sources, not brine.
2528.00.00Calcined Tincal Borate Concentrate
Calcined tincal borate concentrate, heat-treated natural borax for soldering fluxes and heat-resistant alloys. It is included in tariff item 2528.00.00 as a calcined form of natural sodium borate from solid mineral deposits.
2528.00.00Calcined Ulexite Ore Concentrate
Calcined ulexite ore concentrate, a natural sodium calcium borate mineral concentrated and calcined for industrial use in glass and ceramics production. It falls under tariff item 2528.00.00 as a natural sodium borate concentrate that has been calcined.
2528.00.00Kernite Borate Concentrate
Kernite borate concentrate, a sodium borate mineral from solid deposits, concentrated into powder and often partially calcined. This product qualifies under tariff item 2528.00.00 as a natural borate from solid mineral sources, not from brine.
2528.00.00Kernite Sodium Borate Concentrate
Kernite sodium borate concentrate, a naturally occurring sodium borate mineral mined and concentrated for use in detergents and agriculture. It is classified under tariff item 2528.00.00 as a natural sodium borate concentrate, not derived from brine.
2528.00.00Natural Boric Acid Powder from Rasorite
Natural boric acid powder derived from rasorite (refined kernite) through concentration and limited processing, containing not more than 85% H3BO3 on a dry weight basis. It qualifies for tariff item 2528.00.00 as a natural boric acid from solid mineral deposits.
2528.00.00Natural Sodium Borate Powder (Concentrate)
Natural sodium borate powder concentrate, fine-ground from natural sodium borate ores, suitable for ceramic glazes and herbicides. It is classified in tariff item 2528.00.00 for natural sodium borates whether calcined or not, provided not from separated brine.
2528.00.00Priceite Calcium Borate Ore
Priceite calcium borate ore, a rare natural mineral from boron-rich deposits, supplied as crushed ore or powder for specialty ceramics. It meets tariff item 2528.00.00 criteria as an unrefined natural borate concentrate, not from brine.
2528.00.00Refined Kernite Borate Granules
Refined kernite borate granules, granulated concentrate from kernite ore for agricultural boron supplements. It falls under tariff item 2528.00.00 as a natural sodium borate concentrate suitable for calcining if needed.
2528.00.00Tincal Crude Borax Ore
Tincal crude borax ore, a native sodium borate found in solid form in salt lakes, concentrated without brine separation for glassmaking. It is classified under tariff item 2528.00.00 as a natural sodium borate, not separated from brine.
2528.00.00Ulexite Sodium Borate Lumps
Ulexite sodium borate lumps, lump-form concentrate of fibrous ulexite used in fiberglass production. It falls under tariff item 2528.00.00 as a natural sodium borate not separated from brine, in minimally processed lump state.
2528.00.00Ulexite Sodium Calcium Borate Mineral
Ulexite sodium calcium borate mineral, known as TV rock, concentrated from deposits in California and Chile and supplied in powder form. It is classified under tariff item 2528.00.00 as a natural borate not from brine.
2528.00.00Uncalcined Borax Ore (Tincal)
Uncalcined borax ore (tincal), a natural crude borax sodium borate mineral concentrate extracted from evaporated lake deposits and used in metallurgy. It qualifies for tariff item 2528.00.00 as an uncalcined natural sodium borate concentrate, not from brine.