Grain Storage Fumigation (Phosphine Gas, Aluminum Phosphide, Farmworker Deaths) — household safety profile
High riskPhosphine gas (PH3) is the primary fumigant for stored grain worldwide — generated from aluminum phosphide or magnesium phosphide tablets placed in grain bins.
What is this product?
Phosphine gas (PH3) is the primary fumigant for stored grain worldwide — generated from aluminum phosphide or magnesium phosphide tablets placed in grain bins. Extremely toxic: LC50 ~10 ppm (4-hour inhalation). Farmworker deaths: 25+ phosphine-related fatalities in US grain storage (EPA). Exposure route: entering fumigated grain bin during or after treatment without adequate ventilation. Phosphine residue on grain: US FDA tolerance 0.01 ppm (extremely low — phosphine dissipates). Import monitoring: FDA tests imported spices, grains for phosphine residue. Alternatives: controlled atmosphere storage (CO2 or N2), hermetic storage (GrainPro bags), cold storage — but phosphine remains cheapest and most widely used globally.
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Fumigant
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