Asulam (Methyl-4-aminobenzenesulfonylcarbamate) from Canada
Asulam is a sulfonamide herbicide (Methyl-4-aminobenzenesulfonylcarbamate) specifically named in HTS 2935.90.06.00 as a pure chemical compound. Used for broadleaf weed control in cereals and turf, it functions by inhibiting cellulose biosynthesis in plants. Classification under heading 2935 reflects its sulfonamide chemical structure per Chapter 29 notes.
Duty Rate — Canada → United States
110%
Rate breakdown
9903.04.6093.5%Except as provided in heading 9903.04.61, patented pharmaceutical articles as provided for in subdivisions (c) and (d) of U.S. note 40 to this subchapter
9903.05.2910%Except for products described in headings 9903.05.85–9903.05.93, articles the product of Canada, as provided for in U.S. note 52 to this subchapter
Import Tips
• EPA pesticide registration required; provide technical grade certificate (>95% purity) to qualify as pure compound under 2935.90.06.00
• Include phytosanitary certificates if residual herbicides detected; avoid formulation with surfactants that would classify under 3808
• Label as 'technical Asulam' not 'herbicide formulation' to prevent misclassification as pesticide preparation