Ammonium Persulfate from Canada
Ammonium persulfate acts as a bleaching agent, initiator in polymerization, and etchant in electronics. Though persulfates are peroxosulfates, unlisted forms fall under HTS 2833.29.51 as other sulfates/peroxysulfates.
Duty Rate — Canada → United States
3.7%
Rate breakdown
9903.03.030%Articles the product of any country, as provided for in subdivision (aa)(ii) of U.S. note 2 to this subchapter
Import Tips
• Classify oxidizing properties per DOT; requires special handling declarations
• Purity tests essential to distinguish from stabilized organic forms in 2831
• Temperature-controlled shipping to maintain stability