Where does one find and purchase potassium permanganate (aka the purple stuff) to clean veggies with?

I'm also looking for darkened glass bottles to put the purple stuff in as well, so if you have any idea where to find either of these two items, please let me know.

Thanks!

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search Taobao for 食用高锰酸钾

item.jd.com/[...]

and
item.jd.com/10467771169.html

Use any bottle and keep it at a dark place ;-)