NEVER REUSE A PLASTIC CONTAINER THAT HAD A CAUSTIC CHEMICL IN IT.NEVER..IT CAN KILL YOU.
Capable of burning, corroding, dissolving, or eating away by chemical action.Any substance or means which, applied to animal or other organic tissue, burns, corrodes, or destroys it by chemical action. expamples:paints ,oils,gasoline etc.
IF DONT KNOW WHAT WAS IN IT... DONT USE IT