Magnesium Chloride and Calcium Fluoride Flux Mixture from Mexico
Powdered mixture of magnesium chloride and calcium fluoride used as a foundry flux to clean metal surfaces and improve mold-metal interface during casting. Falls under HTS 3824.99.39.90 as other inorganic compound mixtures for metallurgical processes. Reduces casting defects by removing oxides and sulfides.
Duty Rate — Mexico → United States
10%
Rate breakdown
9903.05.5510%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.94, articles the product of Mexico, as provided for in U.S. note 52 to this subchapter
Import Tips
• Provide flux efficacy test data from foundry trials; ensure fluoride content labeling complies with OSHA standards; segregate from organic fluxes during storage to maintain classification