Naphthalene Sulfonate Dispersant from Mexico
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 — Mexico → United States
14%
Rate breakdown
9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
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