Monosodium 1-Amino-8-hydroxy-4,6-naphthalenedisulfonate
This is the monosodium salt of 1-amino-8-hydroxy-4,6-naphthalenedisulfonic acid, a chemically defined organic compound with amino and hydroxy oxygen functions on a naphthalene core, plus sulfonic acid groups forming the salt. It falls under HTS 2922.21.2500 as a specific aminohydroxynaphthalenesulfonic acid salt. 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 classified by sulfonamide function
Sulfonated derivatives may sometimes be interpreted under amino acid-function compounds if sulfur linkage dominates over oxygen functions.
If pre-diluted for azo dye production
Chapter note (h) excludes dilutions for azo dyes from Chapter 29, directing to synthetic coloring matter in Chapter 32.
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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
• Verify purity certificate to confirm it's the monosodium salt without impurities altering classification; ensure SDS and chemical passport for customs clearance
• Avoid misdeclaration as a mixture, which could shift to heading 3824
Related Products under HTS 2922.21.25.00
CAS 117-94-2 1-Amino-8-Naphthol-4,6-Disulfonic Acid Monosodium Salt
CAS 117-94-2 identifies this pure monosodium salt of 1-amino-8-hydroxy-4,6-naphthalenedisulfonic acid, an oxygen-function amino-compound. Classified under HTS 2922.21.2500 due to its specific structure as an aminohydroxynaphthalenesulfonic acid salt. Used in manufacturing reactive dyes and pigments.
H-Acid Monosodium Salt (1-Amino-8-Hydroxy-4,6-NDS)
Known as H-Acid monosodium salt, this is 1-amino-8-hydroxy-4,6-naphthalenedisulfonic acid monosodium salt, a key dye coupler intermediate. It matches HTS 2922.21.2500 exactly as a named aminohydroxynaphthalenesulfonic acid salt with oxygen-function amino groups. Supplied as white to light brown powder for industrial synthesis.
Technical Grade 1-Amino-8-Hydroxy-4,6-Naphthalenedisulfonic Acid Na Salt
Technical grade version of the monosodium salt, containing allowed stabilizers per chapter note (f), still classified as the pure compound under HTS 2922.21.2500. Features amino-hydroxy oxygen functions on naphthalene with disulfonic sodium salt. Used in bulk for azo dye manufacturing.
Dye Coupler H Salt Monosodium 1-Amino-8-OH-4,6-NDS
Industrial dye coupler known as H Salt, the monosodium salt of 1-amino-8-hydroxy-4,6-naphthalenedisulfonic acid. Precisely HTS 2922.21.2500 as a separate chemically defined oxygen-function amino-naphtholsulfonic salt. Essential for producing direct and reactive dyes in textile industry.