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2931.90.70.00/N,N'-Bis(trimethylsilyl) Urea Technical Grade/Mexico

N,N'-Bis(trimethylsilyl) Urea Technical Grade from Mexico

Technical grade N,N'-Bis(trimethylsilyl) urea (95%+ purity) serves as silylating reagent for carbohydrate protection in nucleoside synthesis. Specifically enumerated in HTS 2931.90.70.00 distinguishing it from general silanes.

Duty Rate — Mexico → United States

10%

Rate breakdown

9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
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Import Tips

• Technical vs. 99% grades identical classification but purity affects DEA precursor watch lists

• Air-sensitive; requires inert atmosphere packaging certification for import inspection

• Pharma importers need DMF/CEP documentation linking to FDA drug master files

N,N'-Bis(trimethylsilyl) Urea Technical Grade from Mexico — Import Duty Rate | HTS 2931.90.70.00