Here you go:
"Pickling lime is powdered calcium hydroxide, and is also known as slaked lime. It should not be confused with industrial quick lime, burnt lime or agricultural lime, which are toxic. Pickling lime can still be found in grocery stores in the pickling section, but is readily available from online vendors."
Just make sure to keep it away from aluminum, it eats it up pretty badly. Go invest in a cheap plastic garbage can to do your hides outdoors. Assume for the sake of home and harmony that Mrs. Cam is always right!