p-Toluidine-m-sulfonic Acid Aqueous Solution (50% w/v)
50% aqueous solution of p-Toluidine-m-sulfonic acid, classified under HTS 2921.43.9040 per Chapter 29 note (d) for chemically defined compounds dissolved in water. Used for safe transport in dye manufacturing.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If solvent renders product suitable for specific use beyond transport
Chapter 29 note (e) excludes solutions particularly adapted for end-use from chemical compound headings
If imported as formulated dye coupler solution
Prepared dye intermediates excluded by Chapter 29 note 2(g); classified as synthetic coloring matter
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Import Tips & Compliance
• Document concentration and solvent (water only) to qualify under note (d); organic solvents trigger note (e)
• Use UN-approved packaging for corrosive liquid with proper hazmat declaration
• Verify solution stability data to prove 'normal method for transport' per Chapter 29 notes
Related Products under HTS 2921.43.90.40
p-Toluidine-m-sulfonic acid
p-Toluidine-m-sulfonic acid (CAS No. 88-44-8) is a chemically defined aromatic monoamine derivative with both amino and sulfonic acid functional groups, classified under HTS 2921.43.9040 as a toluidine derivative salt. It serves as a key intermediate in dye synthesis and pharmaceutical production.
p-Toluidine-m-sulfonic Acid Sodium Salt
The sodium salt form of p-Toluidine-m-sulfonic acid, a water-soluble aromatic amine sulfonate under HTS 2921.43.9040 per Chapter 29 salt classification rules. Used in azo dye coupling processes and as a chemical intermediate.
Technical Grade p-Toluidine-m-sulfonic Acid (98% Pure)
Technical grade p-Toluidine-m-sulfonic acid with 98% purity, containing minor impurities but meeting Chapter 29(a) definition for chemically defined organic compounds. Classified specifically under HTS 2921.43.9040 for industrial dye synthesis.
p-Toluidine-m-sulfonic Acid with Stabilizer
p-Toluidine-m-sulfonic acid containing added stabilizer for preservation, classified under HTS 2921.43.9040 per Chapter 29 note (f). The stabilizer does not alter its principal chemical identity as toluidine derivative.