2,5-Dichloroaniline-4-sulfonic acid
2,5-Dichloroaniline-4-sulfonic acid is a sulfonated aromatic amine explicitly covered by HTS 2921.42.36.00. Used in manufacturing acid dyes and as a pharmaceutical intermediate.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If disodium salt or different substitution
Only monosodium salt specified; other salts classify as unspecified aniline derivatives.
If emphasizing sulfonated character over amine function
Chapter notes prioritize amine-function aromatic compounds over organo-sulfur classification.
If toluidine sulfonic acids with methyl substitution
Methylated analogs classified separately under 2921.43 as toluidine derivatives.
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Import Tips & Compliance
• Confirm free acid vs salt form; only monosodium salt explicitly listed with parent acid
• Sulfuric acid derivatives require pH testing documentation for proper amine-function classification
• Avoid water solutions exceeding transport concentration limits per Chapter 29 note (e)
Related Products under HTS 2921.42.36.00
m-Chloroaniline
m-Chloroaniline (3-chloroaniline) is a chemically defined aromatic monoamine derivative with a chlorine substituent at the meta position, explicitly listed under HTS 2921.42.36.00. It serves as a key intermediate in synthesizing pharmaceuticals, pesticides, and dyes.
2,5-Dichloroaniline-4-sulfonic acid monosodium salt
The monosodium salt of 2,5-dichloroaniline-4-sulfonic acid is explicitly listed under HTS 2921.42.36.00 per Chapter 29 salt classification rules. Commonly used in acid dye production.
2,4-Dinitroaniline
2,4-Dinitroaniline is a dinitro-substituted aniline explicitly covered by HTS 2921.42.36.00 as an aromatic amine derivative. Used in explosive manufacture and dye intermediates.
o-Nitroaniline-p-sulfonic acid, sodium salt
The sodium salt of o-nitroaniline-p-sulfonic acid (4-amino-2-nitrobenzenesulfonic acid sodium salt) is specifically named in HTS 2921.42.36.00. Essential for direct dye synthesis.
2,3,4-Trifluoroaniline
2,3,4-Trifluoroaniline is a polyfluorinated aniline derivative explicitly listed under HTS 2921.42.36.00. Used in agrochemical and pharmaceutical synthesis.
m-Chloroaniline Technical Grade 98%
Technical grade m-Chloroaniline (98% purity) qualifies under HTS 2921.42.36.00 as the chemically defined compound allows impurities per Chapter 29 note (a). Used in pesticide synthesis.