99% Pure Dimethyl Propylphosphonate Technical Grade from China
High-purity technical grade dimethyl propylphosphonate (>99%) used in pharmaceutical synthesis and as a flame retardant precursor. Falls under HTS 2931.42.00.00 due to its specific non-halogenated organo-phosphorus structure as per Chapter 29 notes.
Duty Rate — China → United States
41.2%
Rate breakdown
9903.88.0325%Except as provided in headings 9903.88.13, 9903.88.18, 9903.88.33, 9903.88.34, 9903.88.35, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.41, 9903.88.43, 9903.88.45, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(e) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(f)
9903.05.3112.5%Section 301 (forced labor) — additional 12.5% ad valorem on products of China
Import Tips
• Require analytical HPLC/GC reports for purity verification during customs; label as 'not for pesticide use' if applicable to avoid EPA scrutiny
• Check for stabilizer additions per Chapter note 2(f)