Alum Cake (Aluminum Sulfate Byproduct) from Japan
Alum cake is a solid byproduct form of aluminum sulfate from water treatment, containing the chemically defined Al2(SO4)3 compound. It remains classified under HTS 2833.22.00.00 as an aluminum sulfate.
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
• Test for heavy metal contaminants to meet import safety standards; classify based on chemical composition, not physical form; obtain waste import permits if reprocessed