Hello, just wanted to say that I find your posts really informative and well written, it really helped me a lot in my personal researches of natural and gentler products, so thank you a lot :) But I just have a question; you said that potassium alum has no aluminium in it, but I heard that it has, as "alum" would be "aluminium". Is it safe?
Hi Anon - It's incorrect to say potassium alum is free of aluminum – potassium alum is the potassium double sulphate of aluminum. Naturally occurring potassium alum is free of aluminum hydrochloride, while the synthetic version contains aluminum hydrochloride which can be a mild skin irritant. You ask if it is safe. I have extremely sensitive skin and have no trouble with it. This (obviously) doesn't qualify as a guarantee of its safety though. I hope this was some help.
Just wanted to add that they used to put a lot more aluminum in products until the scare started and it was mandated they put in less and they did, although this is going a few years back, in the 90's I believe.
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