o-Toluenesulfonamide (OTS)
o-Toluenesulfonamide is a chemically defined organic sulfonamide compound with the formula C7H9NO2S, featuring a sulfonamide group (-SO2NH2) attached to an o-tolyl ring. It falls under HTS 2935.90.1500 as a specific sulfonamide classified within Chapter 29 for separate chemically defined organic compounds. Primarily used as an intermediate in organic synthesis and plasticizers.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If supplied as a technical-grade mixture with impurities exceeding 1%
Mixtures of isomers or impure organic compounds fall under Chapter 38 preparations, not pure compounds of Chapter 29.
If imported primarily as a sulfonic acid derivative without the amide function
Sulfonated derivatives without nitrogen functions classify earlier in Chapter 29 numerical order per chapter notes.
If in salt form, such as o-toluenesulfonamide sodium salt
Organic salts of sulfonamides are classified with the parent compound per note 3(C)(1), but may shift if coordination complex.
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Import Tips & Compliance
• Verify purity certificate (typically >99%) and provide chemical safety data sheet (SDS) for DOT/REACH compliance during import
• Ensure proper labeling as a sulfonamide per TSCA inventory; avoid misclassification as a mixture which would shift to heading 3824
Related Products under HTS 2935.90.15.00
Technical Grade o-Toluenesulfonamide 98%
Technical grade o-Toluenesulfonamide at 98% purity, containing minor isomers as impurities, used in industrial plasticizer production for PVC flooring. Classified under HTS 2935.90.1500 as it remains a separate chemically defined sulfonamide per Chapter 29 note (a), despite minor impurities. Key intermediate for synthetic resins and coatings.
Pharmaceutical Grade o-Toluenesulfonamide USP
Ultra-pure o-Toluenesulfonamide meeting USP standards for pharmaceutical intermediate synthesis, particularly in sulfonamide antibiotic production. Falls under HTS 2935.90.1500 as a chemically defined sulfonamide of Chapter 29, not excluded under note 2(e) for immunological products. Used in APIs before final formulation.
o-Toluenesulfonamide with Stabilizer Additive
o-Toluenesulfonamide containing <0.5% anticaking stabilizer for safe bulk handling in resin manufacturing. Qualifies under HTS 2935.90.1500 per Chapter 29 note (f) as the stabilizer is necessary for preservation/transport without rendering it specific-use. Common in synthetic rubber accelerators.
o-Toluenesulfonamide Flake Form 99.5%
High-purity o-Toluenesulfonamide in flake physical form for easier dissolution in coating formulations. Classified HTS 2935.90.1500 as the flaked state doesn't change its chemical identity as a sulfonamide under Chapter 29. Used in industrial paints and varnishes.