Technical Grade Metanilic Acid
Technical grade metanilic acid contains allowable impurities but remains a separate chemically defined compound under chapter note (a), classified in HTS 2921.42.21.00. Primarily used in industrial dye manufacturing where high purity is not required.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If purity below technical grade threshold
Other aromatic monoamine derivatives cover lower purity or different aniline salts not specifically named.
If for sulfanilic acid isomers
Closely related para-isomer (sulfanilic acid) falls under different subheading within aromatic amines.
If catalyst preparation containing metanilic acid
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Import Tips & Compliance
• Submit assay reports showing >90% metanilic acid content; impurities must not change chemical identity per chapter notes
• Include stabilizer declaration if anticaking agents added, ensuring they qualify under note (f) for preservation only
• Watch for anti-dusting agent additions; excess may trigger reclassification if rendering product for specific use
Related Products under HTS 2921.42.21.00
Metanilic Acid
Metanilic acid is a chemically defined aromatic monoamine derivative, specifically 3-aminobenzenesulfonic acid, classified under HTS 2921.42.21.00 as an aniline derivative salt. It serves as a key intermediate in the synthesis of azo dyes, pharmaceuticals, and sulfonamide drugs due to its sulfonic acid and amino functional groups.
Metanilic Acid Sodium Salt
The sodium salt of metanilic acid, a water-soluble aromatic amine derivative, falls under HTS 2921.42.21.00 per chapter notes classifying inorganic salts of organic amine compounds with the parent compound. Used in azo dye coupling reactions and as a reagent in analytical chemistry.
Metanilic Acid for Dye Synthesis
Purified metanilic acid packaged specifically for azo dye production, meeting chapter note (h) for diazotizable amines used in dyes, classified under HTS 2921.42.21.00. Essential coupling agent in textile colorant manufacturing.
Pharmaceutical Grade Metanilic Acid
High-purity metanilic acid (>99.5%) for synthesis of sulfonamide antibiotics and pharmaceutical intermediates, classified as a chemically defined aromatic monoamine derivative under HTS 2921.42.21.00. Meets USP/EP standards for drug manufacturing.