1-Phenyl-3-pyrazolidinone (Phenidone) from China
Phenidone is a pyrazolidinone derivative used as a superadditive developing agent in black-and-white photographic films and papers. This aromatic nitrogen-heterocycle enhances development speed when combined with other agents. It qualifies for HTS 2933.99.24.00 as a specialized photographic chemical.
Duty Rate — China → United States
19%
Rate breakdown
9903.05.3112.5%Section 301 (forced labor) — additional 12.5% ad valorem on products of China
Import Tips
• Declare exact chemical composition and CAS number (92-43-3); ensure proper hazard labeling for oxidizer properties; obtain end-user certificates for legitimate photographic use