hi all, i just got a mail from a supplier of material, and they have LME farmaceutical grade and food grade, but what make me doubt its that on the datasheet it says that the LME contains Potassium sorbate, so im not sure if this addition of sorbate on the LME will kill the yeast or it should be safe after the boiling?
im no expert, but apparently potassium sorbate breaks down at well, well over boiling temp (270C) and,
"Potassium sorbate acts as a stabilizer. It does not kill yeast, or stop fermentation but it will stop the existing yeast from further multiplying as they usually would in the presence of sugar. "
That aside, there might be other issues with the malt if it is not intended for brewing. I once received chinese "malt extract" from an asian homebrew store over there and it just wouldn't ferment out properly. I didn't figure out what the issue was, but stopped using that stuff and the problem went away.
What is the source of this LME?