2-Phosphonobutane-1,2,4-tricarboxylic acid (PBTC) from Germany
PBTC is a multifunctional organo-phosphorus chelating agent with phosphorus directly linked to carbon, widely used in water treatment, detergents, and corrosion inhibitors. It is explicitly named in HTS 2931.90.70.00 as a specific organo-inorganic compound, including its various salts.
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
• Salts (sodium, potassium, ammonium) classified with acid per Chapter 29 note 3(C)(1); declare salt form and counterion ratio
• Provide end-use statement distinguishing industrial chelator from pesticide intermediates potentially under Chapter 38
• Ensure 98%+ purity certification; technical grade vs. analytical grade affects documentation requirements