2832.20.00.00/Ammonium Sulfite Solution 40%/Canada

Ammonium Sulfite Solution 40% from Canada

A 40% aqueous solution of ammonium sulfite ((NH4)2SO3) used in wastewater treatment and as an oxygen scavenger. Classified under HTS 2832.20.00.00 as an 'other sulfite' of an inorganic base, meeting Chapter 28 definitions for chemically defined compounds.

Duty Rate — Canada → United States

13.1%

Rate breakdown

9903.05.2910%Section 301 (forced labor) — additional 10% ad valorem on products of Canada

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Import Tips

• Include stability data in documentation; solutions may require UN hazmat certification for transport

• Label concentration precisely (e.g

• 40% w/v); discrepancies lead to reclassification as mixtures

• Obtain prior EPA notification if used in US water systems; import permits may apply for large volumes