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2931.90.90.10/Hexamethyldisilazane/Japan

Hexamethyldisilazane from Japan

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 — Japan → United States

12.5%

Rate breakdown

9903.05.4912.5%Section 301 (forced labor) — Japan (col1 rate < 12.5 percent): MFN < 12.5% → total duty capped at 12.5%
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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