Hexamethyldisilazane from Mexico
Hexamethyldisilazane ((CH3)3Si)2NH is an organo-silicon compound used as a surface modification agent and silylating agent in microelectronics. It qualifies for HTS 2931.90.90.10 as an organo-inorganic compound containing silicon directly linked to carbon, within Chapter 29's scope.
Duty Rate — Mexico → United States
110%
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
9903.05.5510%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.94, articles the product of Mexico, as provided for in U.S. note 52 to this subchapter
Import Tips
• Submit technical data sheets confirming >98% purity to distinguish from mixtures under Chapter 38
• Verify end-use declaration; electronics imports often need additional FCC/ITAR documentation