Carbonyl Sulfide (COS) from China
Carbonyl sulfide is a colorless, poisonous gas (CO S) considered a halide oxide analog in certain classifications but fits 'other' under chlorides/chloride oxides of nonmetals in HTS 2812.19.00.90 per Chapter 28 notes allowing carbon oxysulfide. It serves as an intermediate in chemical manufacturing and pesticide production.
Duty Rate — China → United States
28.7%
Rate breakdown
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)
9903.05.860%Articles provided for in subdivision (b) of U.S. note 52 to this subchapter
Import Tips
• Comply with DOT hazardous material regulations; use specialized cylinders with pressure relief valves
• Include chemical analysis reports to distinguish from organic sulfur compounds; avoid misclassification pitfalls
• Register with ChemTRAC or equivalent for toxic gas tracking upon import