Care of persons exposed to toxic chemicals must be directed by a physician or other recognized authority. Extremely toxic by inhalation or ingestion. Severe burns may result from contact with the skin and eyes. Reacts, sometimes violently, with water to form sulfuric acid. Other Names - Sulfan, sulfuric anhydride, sulfuric oxide.
Caution is advised.
Signs and symptoms of acute ingestion of sulfur trioxide may be severe and include salivation, intense thirst, difficulty in swallowing, chills, pain, and shock. Oral, esophageal, and stomach burns are common. Vomitus generally has a coffee-ground appearance. The potential for circulatory collapse is high following ingestion of sulfur trioxide. Acute inhalation exposure of sulfur trioxide may result in sneezing, hoarseness, coughing, choking, laryngitis, and respiratory tract irritation.