Zinc Sulfite Powder from Canada
Zinc sulfite (ZnSO3) powder used in specialty chemical synthesis and as a corrosion inhibitor. It qualifies under HTS 2832.20.00.00 as a sulfite of an inorganic base (metal salt), distinct from chromates or other excluded 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
Import Tips
• Test for heavy metal content; zinc compounds may trigger TSCA import certification requirements
• Use proper packaging to prevent moisture absorption, which alters chemical identity
• Avoid classifying as zinc oxide (2817); provide structural formula to confirm sulfite ion presence