Monosodium 4-Aminoazobenzene-2,4-disulfonate
This is the monosodium salt of 4-aminoazobenzenedisulfonic acid, a chemically defined diazo compound with an azo (-N=N-) linkage and sulfonic acid groups. It falls under HTS 2927.00.03.00 as a specific azo-compound listed in the tariff schedule for separate chemically defined organic compounds. Primarily used as an intermediate in dye synthesis.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If not exactly matching the named compound due to different isomer or purity
General residual diazo-, azo- or azoxy-compounds heading applies to chemically defined azo compounds not specifically named earlier in 2927.
If formulated as synthetic coloring matter rather than pure chemical
Chapter note excludes coloring matter put up in forms for specific use (heading 3204); pure intermediates remain in Chapter 29.
If classified as double or complex salts with metals
Salts of inorganic acids with organic bases may shift to Chapter 28 per note 1(C) to section VI if inorganic component dominates.
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Import Tips & Compliance
• Provide chemical analysis certificates confirming identity as 4-aminoazobenzenedisulfonic acid monosodium salt to match exact HTS specification
• Ensure packaging complies with UN regulations for hazardous chemicals (likely irritant due to sulfonic groups); include MSDS documentation
• Verify purity levels (>95%) as impurities may trigger reclassification under general azo-compound headings
Related Products under HTS 2927.00.03.00
Sodium Salt of 4-Aminoazobenzene Disulfonate (CAS 20592-48-5)
Commercially available as CAS 20592-48-5, this monosodium salt features the precise structure of 4-aminoazobenzenedisulfonic acid with one sodium cation. HTS 2927.00.03.00 explicitly names this compound as a diazo-/azo- compound within Chapter 29's scope for pure organic chemicals. Used in coupling reactions for disperse dye production.
4-Aminoazobenzene-2,4-disulfonic Acid Monosodium Salt (Dye Intermediate)
Pure monosodium salt form of the disulfonic acid derivative of 4-aminoazobenzene, a diazo compound used in azo dye manufacturing. Classified under HTS 2927.00.03.00 for its specific chemical structure as a named separate organic compound per Chapter 29 note (a). Supplied as technical grade powder for industrial synthesis.
Technical Grade 4-Aminoazobenzene-2,4-disulfonate Sodium
Technical grade (>92% purity) monosodium salt of the named disulfonic acid azo-compound, containing minor stabilizers per Chapter 29 note (f). Remains under HTS 2927.00.03.00 as the principal chemically defined organic compound with impurities not altering classification. Standard for batch dye synthesis.