Toxicity that occurs after inhalation is characterized by chest tightness, cough, and shortness of breath. Severe exposure can cause accumulation of fluid in the lungs, which may have a delayed onset of 72 hours or more after exposure. Pulmonary symptoms can also result from ingestion of metallic phosphides (e.g., aluminum or zinc phosphide).
Children may be more vulnerable because of relatively increased minute ventilation per kg and failure to evacuate an area promptly when exposed.