White Supersulfate Cement from Japan
White supersulfate cement combines Portland clinker with high sulfate content for sulfate resistance, maintaining white color through low-iron components. Classified under HTS 2523.21.00.00 as white hydraulic cement, artificially colored if needed. Used in harsh marine environments.
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
• Provide sulfate resistance test results (EN 197-1) to distinguish from standard Portland
• Ensure clinker-slag blend ratios documented; excessive slag may alter classification