Thread: PH of Alum?

Hi ,

Does anybody know the ph value of Osma's alum bloc? or any alum bloc?
I was talking to somebody about alum the other day and they asked me. Good question i thought i need to find the answer

Cheers MW.

Is very acidic I would guess a PH of 5ish

alum or aluminium potassium sulphate is acidic, lick on the bloc and you will taste it. When you put it on your skin it need to disolve with water to give the effect you want, I dont know exactly the % of the solution but if its 10% the pH is 3-3,5. I do not know the pH of the solid alum.

Anyone remember this?

For coffee it's 5; for tomatoes it's 4;
While household ammonia's 11 or more.
It's 7 for water, if in a pure state
But rainwater's 6, and seawater is 8.
It's basic at 10, quite acidic at 2,
And well above 7 when litmus is blue.
Some find it a puzzlement. Doubtless their fog
Has something to do with that negative log.

I would say it's fairly acidic as well.
If it's ever gotten into your moth after applying, you'll know what I mean!!

Originally Posted by rum

If it's ever gotten into your moth after applying, you'll know what I mean!!

That's cruelty to moths, Rum!

From a supplier of solid alum flakes, blocks and powder:



Regards,
Neil

Originally Posted by Neil Miller

That's cruelty to moths, Rum!

Haha lol must have missed that!
Of course I meant "mouth"!