Lewisite 1 Technical Grade from Mexico
Technical grade 2-Chlorovinyldichloroarsine (Lewisite 1) is a synthetic organo-inorganic compound used in chemical research, classified under HTS 2931.90.90.30. The arsenic-carbon bond and chlorine substitutions qualify it as an 'other' organo-inorganic compound per heading 2931 specifications.
Duty Rate — Mexico → United States
100%
Rate breakdown
9903.04.6096.3%Pharmaceuticals Annex IV: patented pharma articles — 100% floor rate
9903.05.900%Articles already subject to Section 232 (steel/aluminum/copper + derivatives, autos + parts, wood, medium/heavy vehicles + parts, semiconductors, patented pharma) — U.S. note 52(f)
Import Tips
• Declare as Schedule 1 chemical under Chemical Weapons Convention; use DOT-approved containers
• Pitfall: Failing to provide SDS can trigger EPA scrutiny; pair with end-use certificates for clearance