Carbonyl Sulfide (COS) from Canada
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 — Canada → United States
3.7%
Rate breakdown
9903.05.860%Universal product exemption (U.S. note 52(b))
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