Potassium Dithionite from Canada
Potassium dithionite (K2S2O4) serves as a strong reducing agent in chemical synthesis and wastewater treatment. It is categorized under HTS 2831.90.00.00 for other dithionites, as a chemically defined inorganic compound per Chapter 28 Note 1. Primarily supplied as technical grade powder for industrial applications.
Duty Rate — Canada → United States
15.5%
Rate breakdown
9903.05.2910%Section 301 (forced labor) — additional 10% ad valorem on products of Canada
Import Tips
• Include SDS with detailed composition to distinguish from sulfoxylates (which share reducing properties)
• Monitor for spontaneous decomposition; ship with temperature control under 30°C
• Confirm not covered under Montreal Protocol chemicals to avoid additional declarations