H-Acid Monosodium Salt (1-Amino-8-Hydroxy-4,6-NDS) from China
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 — China → United States
35%
Rate breakdown
9903.03.0110%Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
9903.88.0325%Except as provided in headings 9903.88.13, 9903.88.18, 9903.88.33, 9903.88.34, 9903.88.35, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.41, 9903.88.43, 9903.88.45, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(e) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(f)
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