Well, if you drop a large bag of it on your head, yes. It's not particularly poisonous and is in fact used as a food additive, though in fairly small quantities (it has a rather unpleasant taste in...
You will find that AlNa(SO4)2 is the formula for sodium aluminum sulfate. That's its anhydrous form (no water). You usually see it written AlNa(SO4)2 + 12 H2O to include the water that it likes to...