Bentonite Clay and Calcium Hydroxide Core Sand Additive from China
Powdered mixture of bentonite clay (aluminosilicate) and calcium hydroxide designed to enhance green strength and collapsibility of foundry core sands. Falls under HTS 3824.99.39 as a prepared blend of inorganic compounds for foundry mold/core production. Critical for producing defect-free metal castings.
Duty Rate — China → United States
37.5%
Rate breakdown
9903.05.3112.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of China, as provided for in U.S. note 52 to this subchapter
9903.88.0325%Except as provided in headings 9903.88.13, 9903.88.18, 9903.88.33, 9903.88.34, 9903.88.35, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.41, 9903.88.43, 9903.88.45, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(e) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(f)
Import Tips
• Certify bentonite montmorillonite content minimum 70% for foundry grade; include moisture content specs (8-12%) in COA; watch for alkalinity hazards in safety data