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.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If free acid form or different salt
Only sodium salt of this specific compound explicitly listed.
If classified as sulfonated nitro compound
Amine-function takes precedence over sulfonated classification per chapter notes.
If derived from naphthylamine
Naphthylamine sulfonic acids classify separately under 2921.45.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right HTS code — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Molecular formula confirmation C6H5N2O5SNa required for exact HTS match
• Light-sensitive; packaging must prevent degradation affecting purity specs
• Common misclassification as 3204 dye product; remains chemical intermediate
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
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.
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.
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.