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%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
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