Based on the silvery-white metal antimony, with a pH of -31.3, it's 100,000 billion billion billion times more potent than stomach acid, and makes its rambunctious cousin sulfuric acid look as gentle as a vanilla milkshake with whipped cream and a cherry on top.
"You couldn't pick up a bottle of it because after it ate through the bottle, it would dissolve your hand," Sam Kean noted in his book The Disappearing Spoon. This begs a simple question: how is fluoroantimonic acid stored?