Zircon Flour and Sodium Hexametaphosphate Slurry Additive from Mexico
Mixture of finely ground zircon (zirconium silicate) flour and sodium hexametaphosphate used as a deflocculant and binder stabilizer in foundry slurries for investment casting. HTS 3824.99.39 applies to this inorganic compound blend prepared specifically for mold-making processes. Improves slurry fluidity and shell strength in precision casting.
Duty Rate — Mexico → United States
10%
Rate breakdown
9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
Import Tips
• Provide particle size analysis for zircon component to distinguish from raw minerals; comply with zircon dust OSHA exposure limits in documentation; segregate from organic chemicals during storage to maintain purity