Calcium Hydroxide (Slaked Lime) Expiry/Shelf life?

[timtoos]

Hi, I have some food grade calcium hydroxide and I'm wondering if it needs throwing away.

When I bought this, about 6 or so years ago, the BBE was only for 6 months. I used it once and then never again, leaving it in my shed.

Does this need throwing now or is it ok to use still? I want to try using this for adding alkalinity rather than sodium bicarbonate.

Thanks

[LeeH]

I’m sure it will be, chuck it in.


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[ozroger]

An MSDS on Ca(OH)2 I read indicates storage should be in cool dry conditions, but poor shelf life. However I bought* two re-sealable packs of it years ago (one still unopened) and it's doing it's job just fine. Interestingly it was sourced from a kitchen/cooking wares retailer in Melbourne, and the packs said Made in Japan. I would have thought it would have been manufactured locally (Australia). Maybe it is now.

(*After totally ruining the smooth coating of the inside of a prized wedding-gift CorningWare kitchen dish when attempting to make my own! The other half was definitely Not happy, Jan!!)

[MashBag]

It will be ok. I have had some for years (prolly 10)and it still works

[timtoos]

Thanks all, I'll save the money on buying some new stuff and use this