Dodecanedioic Acid from China
Dodecanedioic acid (C12 straight chain), used in high-performance polyesters and nylon 12,12. HTS 2917.19.70.50 classification as long-chain acyclic polycarboxylic acid. Chemically pure dicarboxylic acid meeting Chapter 29 criteria.
Duty Rate — China → United States
16.5%
Rate breakdown
9903.05.3112.5%Section 301 (forced labor) — additional 12.5% ad valorem on products of China
Import Tips
• Thermal stability certificate required for polymer grade
• Distinguish from dimer acids (mixed chain lengths) which go to 3823
• Yellowing index specification critical for quality control