Ammonium Salt of 2-Phosphonobutane-1,2,4-tricarboxylic acid from Germany
Ammonium PBTC salt provides volatility control in certain detergent and cleaning formulations where sodium salts cause residue issues. Falls under HTS 2931.90.70.00 as salt of specifically named organo-inorganic acid.
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
• Ammonium content affects hazmat shipping; declare nitrogen content for DOT classification
• Cleaning product importers should obtain TSCA certification even for formulated ammonium salts
• Distinguish from fertilizer ammonium phosphates (Chapter 31) by declaring chelating function