Difenzoquat Methyl Sulfate Ion-Pair Reagent from Germany
Specialty grade 1,2-dimethyl-3,5-diphenyl-1H-pyrazolium methyl sulfate used as ion-pairing agent in reversed-phase HPLC for quaternary ammonium compound analysis. Meets Chapter 29 note (e) as solvent-dissolved for safe transport but suitable for general lab use. The pyrazole structure classifies specifically under HTS 2933.19.15.00.
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
• Specify concentration and solvent (typically methanol/water) complies with Chapter 29 note (e) transport criteria
• Provide documentation that solution suitable for general analytical use, not proprietary method-specific
• Label clearly as 'HPLC ion-pair reagent' to prevent confusion with pesticide technical material