Naphthalene Sulfonate Dispersant from Canada
Naphthalene sulfonate is a classic aromatic dispersant for pigments and dyes, classified in HTS 3402.49.10.00 due to its fused aromatic ring structure and surface-active properties. Key in concrete admixtures and ink manufacturing.
Duty Rate — Canada → United States
14%
Rate breakdown
9903.05.2910%Except for products described in headings 9903.05.85–9903.05.93, articles the product of Canada, as provided for in U.S. note 52 to this subchapter
Import Tips
• Document dispersancy performance to support 3402 classification over Chapter 29
• Provide molecular structure confirming aromatic modification
• Avoid retail sale packaging which triggers different subheadings