Calcium Phosphide from Mexico
Calcium phosphide serves as a phosphide for generating phosphine gas in life-saving pyrotechnic signal flares and smoke generators. It is classified under HTS 2853.90.50.00 as a phosphide of other metals, chemically defined per Chapter 28 notes. This reactive compound is used in emergency signaling devices.
Duty Rate — Mexico → United States
10%
Rate breakdown
9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
Import Tips
• Comply with DOT hazardous material regulations (UN1432); include phosphine emission test data
• For pyrotechnic use, cross-reference ATF import requirements if destined for signal flares