Sulfur oxides, Hydrogen Sulfide, Iron Oxide Fume. See Section B 2. Exposure to sulfur dust can cause skin irritation. Symptoms include reddening, itching, and inflammation. May cause coughing, sore throat, and shortness of breath.
Large doses can cause gastrointestinal irritation, nausea, vomiting, and diarrhea.
Ingestion of greater than 15 grams may cause production of hydrogen sulfide from bacterial action in colon. Hydrogen sulfide thus produced can cause effects on central nervous system, including convulsions, changes in blood pressure and respiration, respiratory arrest, and possibly death. Chronic inhalation may cause bronchopulmonary disease which may be complicated by emphysema and bronchiectasis. Repeated and prolonged contact with iron oxide fume can cause staining of the eyes and changes in chest x-rays indicative of lung damage. None of note.