yes it is
Tincture of iodine: a mixture of elemental iodine and sodium iodide solved in ethanol and water.
$8.3
No.If it did, it'd spontaneously boil, fume of burn in its container.
It is an edible plant in the mustard family, having spreading crinkled leaves that do not form a compact head. And it doesn't taste that good but that's my opinion.