1,9-Thianthrenedicarboxylic acid from Germany
1,9-Thianthrenedicarboxylic acid is a polycyclic aromatic heterocyclic compound with sulfur bridges and carboxylic acid groups. Explicitly named in HTS 2934.99.05.00 under 'other heterocyclic compounds: aromatic.' Used in specialty dyes and advanced material synthesis.
Duty Rate — Germany → United States
10%
Rate breakdown
9903.05.3910%Section 301 (forced labor) — European Union member state (col1 rate < 10 percent): MFN < 10% → total duty capped at 10%
Import Tips
• Provide molecular weight and carboxylic acid titration data to confirm identity and acid-function classification
• Ensure proper corrosion-resistant packaging due to carboxylic acid properties during ocean freight
• Declare exact CAS registry number to prevent confusion with thianthrene derivatives in other subheadings