Hexamethylenetetramine with Anti-Caking Agent from Mexico
Hexamine powder treated with 0.15% silica anti-caking agent for free-flowing properties. Allowed under HTS 2933.69.5000 per Chapter 29 note (f) as stabilizer necessary for transport.
Duty Rate — Mexico → United States
16.3%
Rate breakdown
9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
Import Tips
• Declare exact anti-caking percentage; >1% risks 3824 classification as mixture
• Silica type (precipitated vs fumed) affects food contact approval status
• Particle size distribution (90% through 20 mesh) important for resin blending