Does lye expire?

[Soapy Gurl]

I have some lye from a long time ago, I am just not sure how old it is. How long does it last? Does it loose its oomph? I tried finding some info on google but I just didn't get any good results.

 

[Cuckoo Bananas]

Does it have an expiration on the packaging? Be careful it isn't all clumpy and stuck together if its ancient old and you still try to use it.

 

[mostho]

It expires in the meaning that NaOH is higly hygroscopic so tends to absorb moist from the air becasue its nature, so when it become clumpsy and stoney.

 

[Soapy Gurl]

It has a few clumps, but not bad. If I do a test batch, how do I tell if the soap is too low on lye?

 

[soapbuddy]

Carefully take out the lumps and use just the free flowing flakes or beads. I would superfat as normal.