Antifoam Additive Based on Polyglycol Methylphosphonate from China
An industrial antifoam agent composed of polyglycol esters of methylphosphonic acid for use in chemical manufacturing and wastewater treatment. Classified under HTS 3824.92.00.00 due to its specific chemical structure as polyglycol esters of methylphosphonic acid. It controls foam formation in processing by altering surface tension.
Duty Rate — China → United States
42.5%
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
• Provide detailed formulation certificates proving polyglycol ester content to prevent reclassification
• Comply with DOT hazardous material shipping regulations if concentration exceeds flammability thresholds
• Label clearly as chemical preparation under 3824 to distinguish from finished defoamers in 3402