H-Acid Monosodium Salt (1-Amino-8-Hydroxy-4,6-NDS) from Mexico
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.
Duty Rate — Mexico → United States
10%
Rate breakdown
9903.05.5510%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.94, articles the product of Mexico, as provided for in U.S. note 52 to this subchapter
Import Tips
• Use UN-approved chemical packaging for transport per safety notes (e); declare exact purity to prevent classification as impure mixture
• Common pitfall: confusing with disodium salt, which may fall under other subheadings