If you eat it in your stomach, but it's small, it's not big!
BaSO4 name of barite, it belongs to heavy metal salt, we know that the toxic heavy metal salt, but because BaSO4 is insoluble in water and acid insoluble lead, even if we eat into the stomach, it is not likely to have toxic Ba2+, so it is non-toxic. We sometimes use it to the hospital to do x, called "barium meal" for developing.
Non-toxic, dust can cause silicosis occupational diseases
