Potassium Tetraborate from China
Potassium tetraborate is an inorganic salt used as a boron source in welding fluxes and ceramics. It is classified in HTS 2840.20.00.00 as other borates, distinct from sodium borates. This compound appears as a white powder soluble in water.
Duty Rate — China → United States
41.2%
Rate breakdown
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)
9903.05.3112.5%Section 301 (forced labor) — additional 12.5% ad valorem on products of China
Import Tips
• Submit chemical composition analysis to prove potassium borate identity
• Check REACH-like compliance for EU-origin goods transshipping to US
• Label as 'not for food use' to prevent misimport as additive