1,3,6-1,3,7-NTS Acid for Acid Dyes from Japan
Mixture of naphthalenetrisulfonic acid isomers (1,3,6 & 1,3,7) used as diazo component in acid dye synthesis. Precisely matches HTS 2904.10.15.00 for mixtures of these specific sulfonated derivatives containing only sulfo groups.
Duty Rate — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of Japan, with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 12.5 percent, as provided for in U.S. note 52 to this subchapter
Import Tips
• Document intended industrial use to distinguish from Chapter 32 exclusions for coloring matters
• Test for heavy metal impurities (<10 ppm) required for dye intermediate import clearance
• Use DOT-approved corrosive packaging; common violation leads to CBP holds