title: Chemical composition for saltpeter.
mesh_terms: D055598:Chemical Phenomena; D002621:Chemistry; D006801:Humans; D009566:Nitrates / Q000009:adverse effects; D017680:Potassium Compounds; D011561:Pseudoxanthoma Elasticum / Q000139:chemically induced
chemical_list: D009566:Nitrates; D017680:Potassium Compounds; C023844:potassium nitrate