2523.21.00.00/White Supersulfate Cement/Japan

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%Section 301 (forced labor) — Japan (col1 rate < 12.5 percent): MFN < 12.5% → total duty capped at 12.5%

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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