Silicic Acid Tetraethyl Ester (Tetraethoxysilane) from China
Tetraethyl orthosilicate (TEOS) is silicic acid tetraester used in sol-gel processing, chemical vapor deposition, and zeolite manufacturing. Classifies under HTS 2920.90.51.00 as ester of inorganic silicon acid. Semiconductor precursor.
Duty Rate — China → United States
120%
Rate breakdown
9903.04.6096.3%Except as provided in heading 9903.04.61, patented pharmaceutical articles as provided for in subdivisions (c) and (d) of U.S. note 40 to this subchapter
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
9903.88.157.5%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)
Import Tips
• Hydrolysis rate data needed for sol-gel application declarations
• Silicon content verification prevents misclassification as organosilicon polymer