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.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If classified as other toluidine derivatives not specifically named
Broader 'Other' subheading within toluidines if not explicitly matching p-Toluidine-m-sulfonic acid description
If for sulfonated aromatic compounds without prominent amine function
Sulfonic acid derivatives of aromatics fall under Chapter 29 heading 2904 if amine group not principal function
If when imported as synthetic dye intermediate already formulated
Chapter 29 excludes finished synthetic coloring matter (note 2(g)); shifts to Chapter 32 if dye-specific
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Import Tips & Compliance
• Verify CAS No. 88-44-8 on all documentation and labels to match exact HTS 2921.43.90.40 specification
• Provide purity certificates (>98%) as impurities may affect classification under Chapter 29 note (a)
• Ensure SDS includes handling for corrosive sulfonic acid properties to comply with hazmat shipping
Related Products under HTS 2921.43.90.40
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 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.
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.