Commercial Phosphorus Trisulfide Powder from China
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 — China → United States
38.7%
Rate breakdown
9903.03.0110%Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
9903.88.0325%Except as provided in headings 9903.88.13, 9903.88.18, 9903.88.33, 9903.88.34, 9903.88.35, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.41, 9903.88.43, 9903.88.45, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(e) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(f)
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