2-Chloro-p-toluidine-5-sulfonic acid
A chemically defined aromatic monoamine derivative featuring a toluidine base with chloro and sulfonic acid substituents, classified under HTS 2921.43.90.20 per CAS No. 88-51-7. It serves as a key intermediate in synthesizing azo dyes and pigments due to its reactive amine and sulfonic groups.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If formulated as a salt rather than free acid
Aromatic monoamine salts are classified under later subheadings like 2921.45 per chapter note on salts following the base compound numerically.
If further processed into synthetic dye coloring matter
Chapter excludes finished synthetic organic coloring matter, directing it to Chapter 32 headings for dyes rather than intermediates.
If primarily characterized as organo-sulfur compound
Organo-sulfur compounds with sulfur directly linked to carbon fall under heading 2930, but amine function takes precedence per numerical order rule.
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Import Tips & Compliance
• Verify CAS No. 88-51-7 on all documentation and COA to match exact HTS specificity; ensure proper hazardous material labeling as it's a sulfonic acid
• Conduct fiber content analysis if used in dye blends to avoid reclassification
Related Products under HTS 2921.43.90.20
2-Chloro-p-toluidine-5-sulfonic acid Sodium Salt
The sodium salt form of 2-chloro-p-toluidine-5-sulfonic acid (CAS 88-51-7 base), a water-soluble aromatic amine derivative used in dye manufacturing. Classified specifically under HTS 2921.43.90.20 as the parent compound's salt per chapter notes on inorganic salts.
CAS 88-51-7 2-Chloro-4-methyl-6-sulfanilic acid
Alternative naming for 2-Chloro-p-toluidine-5-sulfonic acid (CAS 88-51-7), an aromatic toluidine derivative with sulfonic acid group for enhanced solubility in azo pigment production. Precisely matches HTS 2921.43.90.20 due to its chemical definition as a toluidine salt derivative.
2-Chloro-p-toluidine-5-sulfonic acid Technical Grade
Technical grade 2-Chloro-p-toluidine-5-sulfonic acid (CAS 88-51-7) with minor impurities, still qualifying as a separate chemically defined compound under Chapter 29 notes. Used in industrial dye synthesis, classified under the specific HTS 2921.43.90.20.
Dye Intermediate 2-Chloro-5-sulfo-4-methylaniline
Synonymous with 2-Chloro-p-toluidine-5-sulfonic acid (CAS 88-51-7), this aromatic amine-sulfonic acid is a building block for reactive dyes. Falls under HTS 2921.43.90.20 as a toluidine derivative per precise chemical structure.