2523.10.00.00/Supersulfate Cement Clinker/Japan

Supersulfate Cement Clinker from Japan

Supersulfate cement clinker combines Portland clinker with high ratios of calcined gypsum and slag for extreme sulfate resistance. Classified as hydraulic cement clinker under HTS 2523.10.00.00 prior to final grinding.

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

• Document gypsum and slag ratios (>50% combined) to confirm supersulfate type and hydraulic classification

• Use ventilated containers to prevent moisture absorption, which could alter clinker properties and classification