Pyridine Sulfate from Japan

Pyridine sulfate is the acidic salt formed from pyridine and sulfuric acid, used in analytical chemistry and as a reagent. Chapter 29 note (C)(1) requires classification with the organic pyridine base. HTS 2933.31.00.00 designation.

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

• Corrosive solid classification requires UN 1804 labeling

• Confirm stoichiometric ratio for salt verification

• pH testing documentation prevents acid mixture classification