Kernite 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.
Import Duty Rates by Country of Origin
| Origin Country | MFN Tariff | Surtaxes | Total Effective Rate |
|---|---|---|---|
| 🇨🇳China | Free | — | Free |
| 🇲🇽Mexico | Free | — | Free |
| 🇺🇸United States | Free | — | Free |
| 🇩🇪Germany | Free | — | Free |
| 🇯🇵Japan | Free | — | Free |
More Specific Codes
This product may fall under a more specific subheading:
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If the kernite is refined into pure sodium borate chemicals
Refined borate chemicals are classified in Chapter 28.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right tariff item — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Confirm the concentrate is from solid mineral deposits, not natural brine, to meet tariff item requirements
• Keep documentation of the concentration process (e.g
• flotation or screening)
• Be prepared to declare whether the product is calcined or not
Related Products under Tariff item 2528.00.00
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.
Calcined 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.
Calcined 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.
Calcined 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.
Calcined 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.
Kernite 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.