2908.99.03.00/3,6-Dihydroxy-2,7-naphthalenedisulfonic acid/Canada

3,6-Dihydroxy-2,7-naphthalenedisulfonic acid from Canada

A naphthalene-based compound with two hydroxy groups and two sulfo groups, explicitly named in HTS 2908.99.0300 as a sulfonated derivative of phenols or phenol-alcohols containing only sulfo groups. This chemically defined organic compound serves as a key intermediate for azo dye production. Its classification follows chapter note prioritizing last numerical heading for multi-function compounds.

Duty Rate — Canada → United States

15.5%

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
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Import Tips

• Submit NMR or HPLC analysis verifying the exact isomer structure, as chapter note (b) excludes certain isomer mixtures

• Confirm absence of halogen or nitro groups through testing to maintain classification in the 'sulfo groups only' subheading

• Declare CAS number (specifically 581-86-2) and molecular formula on commercial invoice for accurate HTS verification

3,6-Dihydroxy-2,7-naphthalenedisulfonic acid from Canada — Import Duty Rate | HTS 2908.99.03.00