Use - Pesticide. Materials to Avoid - Alkali. Avoid sources of heat including fire. Will emit highly toxic fumes of phosphorus and sulfur oxides when heated to decomposition. Extremely toxic if inhaled.
Caution is advised.
Fensulfothion is a cholinesterase inhibitor. Mental confusion and psychosis may occur. Excessive salivation, nausea, vomiting, anorexia, diarrhea, and abdominal pain may also occur. The heart rate may decrease following oral exposure or increase following dermal exposure. Chest pain may be noted.