1-Phenyl-3-pyrazolidinone (Phenidone) from Mexico
Phenidone is a pyrazolidinone derivative serving as a superadditive developing agent in black-and-white photographic film development. Its unfused pyrazolone ring structure places it under HTS 2933.19.30 as a photographic chemical. It accelerates silver halide reduction when combined with metol or hydroquinone.
Duty Rate — Mexico → United States
16.5%
Rate breakdown
9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
Import Tips
• Submit technical data sheets showing compatibility with standard photographic developers to confirm classification
• Verify purity levels (>98%) typical for photographic grade; impure grades risk reclassification as general organic chemicals