Zircon Flour and Sodium Hexametaphosphate Slurry Additive from Canada
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 — Canada → United States
60%
Rate breakdown
9903.03.1450%Articles the product of Canada as provided in subdivision (b)(3) of U.S. note 51 to this subchapter
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
• 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