High-Purity Barium Carbonate for Optical Glass from China
Ultra-high purity barium carbonate (>99.9%) is essential for manufacturing high-refractive index optical glass like barium flint. Classified under HTS 2836.60.00.00 as a pure inorganic carbonate per Note 1 to Chapter 28 definitions.
Duty Rate — China → United States
27.3%
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)
9903.05.860%Articles provided for in subdivision (b) of U.S. note 52 to this subchapter
Import Tips
• Provide trace metal analysis to prove optical grade; cleanroom packaging required
• Common issue: impurities shifting to general chemical preps in 3824