2931.90.70.00/Potassium Salt of 2-Phosphonobutane-1,2,4-tricarboxylic acid/Japan

Potassium Salt of 2-Phosphonobutane-1,2,4-tricarboxylic acid from Japan

Dipotassium PBTC salt preferred in potassium-formulated cooling water treatments avoiding sodium discharge limits. Salts of specifically named acids remain in HTS 2931.90.70.00.

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

• Potassium content analysis prevents misdeclaration as sodium salt affecting softener compatibility

• Lower alkalinity than sodium salt affects pH adjustment calculations for importers

• Certain states restrict potassium discharge; end-use letters may be required