Potassium Metal Chunks from Mexico
High-purity potassium metal supplied in small chunks under inert atmosphere, used in organic synthesis and as a reducing agent. Falls under HTS 2805.19.90 as an alkali metal, not in solution or interalloyed. Excludes rare-earth metals or mercury per Chapter 28 notes.
Duty Rate — Mexico → United States
5.5%
Rate breakdown
9903.05.860%Universal product exemption (U.S. note 52(b))
Import Tips
• Ship under argon or mineral oil to prevent oxidation; include Material Safety Data Sheets (MSDS)
• Declare exact purity to avoid reclassification as alloys under Section XV
• Comply with DOT regulations for reactive solids (Division 4.3)