Tetramethylguanidine (TMG) from Germany
Tetramethylguanidine is a strong organic base classified under HTS 2925.29.70.00 as an imine-function compound and derivative. It features a guanidine structure with four methyl groups, making it a chemically defined compound fitting Chapter 29 note (a). Primarily used as a catalyst in chemical synthesis.
Duty Rate — Germany → United States
10%
Rate breakdown
9903.05.3910%Section 301 (forced labor) — European Union member state (col1 rate < 10 percent): MFN < 10% → total duty capped at 10%
Import Tips
• Verify purity certificate (≥98%) to confirm classification as chemically defined compound per Chapter 29 note (a); impurities may shift to mixtures
• Include Safety Data Sheet (SDS) showing non-specific use additives to avoid reclassification under note (g)
• Declare exact CAS number (80-70-6) on entry documents to prevent customs scrutiny