Muriatic acid is 37%. HCl. You can get at masonry outfit or good lumber yard or paint store. To convert to ZnCl dilute with equal amount water (if working fairly clean stuff - if real nasty leave at 37%) add anything galvanized = will strip zinc off real fast.
Use in glass container.
I would not call it toxic as such at 37% or less BUT do NOT get in eyes and the good old generic "use in fresh air or well ventilated area"
Dan Bentler
