Boric Acid Trimethyl Ester from China
Trimethyl borate, ester of boric acid and methanol, used as boron source in ceramics, flame retardants, and organic synthesis. HTS 2920.90.51.00 covers esters of boron inorganic acid (nonmetal). Volatile liquid intermediate.
Duty Rate — China → United States
11.2%
Rate breakdown
9903.88.157.5%Except as provided in headings 9903.88.39, 9903.88.42, 9903.88.44, 9903.88.47, 9903.88.49, 9903.88.51, 9903.88.53, 9903.88.55, 9903.88.57, 9903.88.65, 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(r) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(s)
9903.03.030%Articles the product of any country, as provided for in subdivision (aa)(ii) of U.S. note 2 to this subchapter
Import Tips
• Hydrolyzes in air; import under nitrogen requires special packaging declaration
• Boron content assay confirms inorganic acid ester status