N,N'-Bis(trimethylsilyl) Urea from Japan
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 — 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%
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