Asulam (Methyl-4-aminobenzenesulfonylcarbamate)
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.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If imported as formulated herbicide product with adjuvants
Herbicide formulations containing Asulam as active ingredient (> specific threshold) classify under Chapter 38 as 'herbicides'.
If structurally similar but not exactly named compounds
Other unspecified sulfonamides use 2935.90.50; only exactly matching names qualify for 2935.90.06.00.
If diluted with solvents for transport per Chapter 29 note (e)
Solutions in solvents for safety/transport allowed in Chapter 29 only if not rendering product suitable for specific use.
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Import Tips & Compliance
• 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
Related Products under HTS 2935.90.06.00
4-Amino-6-chloro-m-benzenedisulfonamide
This is a specific sulfonamide compound classified under HTS 2935.90.06.00 as a chemically defined organic compound containing sulfonamide groups. It is primarily used as an intermediate in pharmaceutical synthesis for carbonic anhydrase inhibitors and in agricultural chemical production. The product falls under Chapter 29 heading 2935 for sulfonamides other than those of subheading 2935.10.
Asulam Sodium Salt
The sodium salt form of Methyl-4-aminobenzenesulfonylcarbamate (Asulam sodium salt) remains classified under HTS 2935.90.06.00 per Chapter 29 note 3(C)(1). Inorganic salts of sulfonamide compounds follow the classification of the parent organic compound. Used interchangeably with Asulam in herbicide applications requiring water solubility.
4-Amino-6-chloro-m-benzenedisulfonamide Technical Grade
Technical grade 4-Amino-6-chloro-m-benzenedisulfonamide (95-98% purity) qualifies under HTS 2935.90.06.00 as the named sulfonamide compound per Chapter 29 scope for compounds 'whether or not containing impurities'. Used in synthesis of diuretics and bactericides.
Asulam Stabilized with Anticaking Agent
Asulam powder stabilized with silica anticaking agent (<1%) falls under HTS 2935.90.06.00 per Chapter 29 note (f) allowing stabilizers necessary for preservation/transport. Prevents clumping in herbicide manufacturing processes.