Commercial Phosphorus Trisulfide Powder from Canada
Commercial phosphorus trisulfide (P4S3) is a red to yellow crystalline powder used primarily in the manufacture of safety match striking surfaces and organic synthesis. It falls under HTS 2813.90.50.00 as 'other' sulfides of nonmetals, specifically classified as commercial phosphorus trisulfide distinct from pure forms. This inorganic compound reacts with moisture to release toxic hydrogen sulfide gas.
Duty Rate — Canada → United States
13.7%
Rate breakdown
9903.05.2910%Section 301 (forced labor) — additional 10% ad valorem on products of Canada
Import Tips
• Obtain proper hazardous material certification (UN#1341) and ensure packaging meets UN-approved drums; verify commercial grade purity >95% to avoid reclassification; include Material Safety Data Sheets (MSDS) detailing phosphine and H2S risks