Anhydrous Borax Concentrate from Japan
Anhydrous borax concentrate is produced by calcining natural tincal or kernite ores, resulting in dehydrated sodium borate suitable for welding fluxes. HTS 2528.00.00 covers this as calcined natural borates from solid sources, excluding brine-derived products. It's valued for high boron content in metallurgical applications.
Duty Rate — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of Japan, with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 12.5 percent, as provided for in U.S. note 52 to this subchapter
Import Tips
• Certify calcination temperature logs to prove natural processing without chemical synthesis
• Test for anhydrous state to avoid moisture-related weight disputes at customs