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Hot Yeast

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Ken2029

NewBee
Registered Member
Oct 26, 2015
162
1
0
Folks: I inadvertently left a package of 71-B in my car all day. The temperature inside probably got up to 90 degrees Fahrenheit. The homebrew store does not open again until Wednesday.

Would you risk using it?
 

Squatchy

Lifetime GotMead Patron
Lifetime GotMead Patron
Nov 3, 2014
5,542
261
83
Denver
Only if you have something to repitch with if it doesn't get off. You could put h ut in a smaller batch and once it shows proof, add it to the remaining batch
 

Ken2029

NewBee
Registered Member
Oct 26, 2015
162
1
0
I was just going to put it in a one gallon batch of bochet, anyway. That's a good idea. The store is open Tuesday, not Wednesday. If it doesn't take off, I can pop down for more yeast.
 

Chevette Girl

All around BAD EXAMPLE
Moderator
Lifetime GotMead Patron
Apr 27, 2010
8,447
59
48
Ottawa, ON
When you've got a yeast packet you're not sure about, the best way to check is to start out as if you were making a yeast starter... Rehydrate it according to the package, wait the required time, and then add must in the same amount as rehydration water (so you double your volume), and wait... and watch. If it's an hour later and nothing's changed and the surface is smooth like standing water, you'll know it's not viable. If you see gentle bubbling, frothing, or other signs of activity on the surface, you're probably good to go. I call it "proofing" the yeast, not actually sure if I'm using the term correctly.
 

bernardsmith

Got Mead? Patron
GotMead Patron
Sep 1, 2013
1,611
32
48
Saratoga Springs , NY
I agree with Chevette Girl but isn't dry yeast very stable? It's in a sealed pack and so if this was baker's yeast would it not be on a shelf in the supermarket? Ninety Fahrenheit is not particularly high if you are rehydrating the yeast and if there is no moisture in the pack I am not sure that I would be anxious. That your LHBS stores every pack of yeast - liquid or dry - in a fridge does not mean that the unopened dry yeast must be stored cold. Could be wrong.. but my money is on the yeast.
 
Barrel Char Wood Products

Viking Brew Vessels - Authentic Drinking Horns