N,N'-Bis(trimethylsilyl) Urea from China
N,N'-Bis(trimethylsilyl) urea is a chemically defined organo-silicon compound containing silicon atoms directly linked to carbon, used primarily as a silylating agent in organic synthesis and as a reagent in pharmaceutical manufacturing. It falls under HTS 2931.90.70.00 as one of the specifically named organo-inorganic compounds in this statistical suffix.
Duty Rate — China → United States
35%
Rate breakdown
9903.03.0110%Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
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)
Import Tips
• Provide Safety Data Sheets (SDS) and chemical purity certificates to verify identity as the specifically named compound
• Declare exact CAS number (3189-44-0) and ensure packaging complies with UN hazardous materials regulations for organosilicon reagents
• Avoid misclassification as general organo-silicon under 2931.90.30 by providing structural analysis confirming trimethylsilyl groups