Sulfur trioxide.
D000397:Air Pollution / Q000032:analysis; D055598:Chemical Phenomena; D002621:Chemistry; D004781:Environmental Exposure; D005131:Eye Injuries / Q000139:chemically induced; D005392:First Aid; D006801:Humans; D008452:Maximum Allowable Concentration; D009784:Occupational Diseases / Q000139:chemically induced; D009787:Occupational Medicine; D012140:Respiratory Tract Diseases / Q000139:chemically induced; D012871:Skin Diseases / Q000139:chemically induced; D013454:Sulfoxides / Q000506:poisoning; D013464:Sulfuric Acids / Q000506:poisoning
D013454:Sulfoxides; D013464:Sulfuric Acids