Sulfanilic Acid
Sulfanilic acid (4-aminobenzenesulfonic acid) is a white crystalline powder classified under HTS 2921.42.22.00 as an aniline derivative and salt thereof, consisting of a chemically defined aromatic monoamine with a sulfonic acid group. It serves as a key intermediate in dye manufacturing and pharmaceutical synthesis.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If derivative other than simple sulfanilic acid
Other aniline derivatives and salts fall under this subheading, distinguished by specific chemical structure.
If formulated as synthetic dye intermediate
Processed into coloring matter, shifting from pure chemical to Chapter 32 product.
If containing added sugar ethers or similar
Organic compounds with added saccharide radicals classified later in Chapter 29 numerical order.
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Import Tips & Compliance
• Verify purity ≥98% via Certificate of Analysis to confirm classification as chemically defined compound under Chapter 29
• Include SDS and REACH compliance docs; sulfonic acids may trigger hazardous material shipping requirements
• Avoid misclassification as sulfonated dye intermediate (3204) by ensuring no coloring properties
Related Products under HTS 2921.42.22.00
Pharmaceutical Grade Sulfanilic Acid USP
USP-grade sulfanilic acid meets pharmacopeia standards for use in diagnostic reagents and synthesis of sulfa drugs, classified under HTS 2921.42.22.00 as a pure aromatic monoamine derivative. Its high purity ensures compliance with Chapter 29 requirements for separate chemically defined compounds.
Bulk Sulfanilic Acid Flakes
Sulfanilic acid produced in flake form for industrial dye and pigment manufacturing is classified under HTS 2921.42.22.00 as the specific aniline derivative salt. The physical form does not affect chemical classification under Chapter 29 aromatic monoamines.
Technical Grade Sulfanilic Acid 98%
Technical grade sulfanilic acid at 98% purity is a bulk industrial chemical used primarily in azo dye production, classified as the specific aniline derivative under HTS 2921.42.22.00 per Chapter 29 notes for chemically defined compounds. It may contain minor impurities but remains a separate organic compound.
Sulfanilic Acid with 0.5% Stabilizer
Sulfanilic acid stabilized with 0.5% anticaking agent for safe transport and storage qualifies under HTS 2921.42.22.00 per Chapter 29 note (f), retaining classification as the base chemically defined compound. The stabilizer is necessary for preservation without altering general use.