storing dried yeast

Have a question or want to show off your project? Post it! No Registration Necessary.  Now with pictures!

Threaded View


If I use dried yeast from one of those hermetically sealed foil packets but
don't use the entire packet, can that yeast be stored and used later?

How should it be stored? Refrigerator? Freezer?

What might be effects on my fermented product be if the opened yeast packet
is stored too long?


Thanks



Re: storing dried yeast


abe865fdecdefg235726816 wrote:
Quoted text here. Click to load it

Just keep in the fridge in a safe place where the packet won't
get crushed or puctured.  There are dates on most packets, mine
have been out as far as 2008.

--
Dan

Re: storing dried yeast



"abe865fdecdefg235726816"
Quoted text here. Click to load it

I think you should toss it. It isn't so expensive that you really want to
take a chance on it later. But, if you really want to keep it around, wrap
in tightly in plastic (Saran, et al) wrap and put it in the freezer.



Re: storing dried yeast


On Mar 31, 10:12 am, "abe865fdecdefg235726816"
Quoted text here. Click to load it

i keep mine in a tupperware-like container in the fridge.

but that begs to ask a few other questions. how cold is too cold?
should i store open packages in the same container as unopened ones?
am i overthinking this once again? should i skip step two?


Re: storing dried yeast


Quoted text here. Click to load it

The companies usually say not to freeze them.  However, I've kept packets
in the freezer before and it didn't seem to hurt them as far as I could tell.
I switched to keeping them in the fridge though.

Quoted text here. Click to load it

I don't think it makes any difference.


John.

Re: storing dried yeast



"abe865fdecdefg235726816"
Quoted text here. Click to load it

I have used a half packet, just wrapped up the remainder with a rubber band
tightly in the refrigerator, and used it successfully within a few weeks.
The way I pitch my yeast I can easily tell within a few hours if it is going
to become active. I have tried reconstituting in water, water with sugar and
nutrients, part of the must with all of the above, and still not had good
results.  I simply sprinkle the yeast across the surface of the must.  This
has never failed me.  It gets plenty of oxygen at the start and I can see
very quickly if the yeast has life in it...

Quixote



Re: storing dried yeast


abe865fdecdefg235726816 wrote:
Quoted text here. Click to load it

You can, but I wouldn't reuse it.  I've known people to have their beer
get infected by doing that.  It's cheap, just buy more.

Quoted text here. Click to load it

Refrigerator

    --------->Denny
--
Life begins at 60...1.060, that is.

Re: storing dried yeast



Quoted text here. Click to load it

I have to if I want to use Nottingham. The LHB suppliers don't sell it so I
have to buy 500g packs direct from Lallemand who have a sales office in my
city.
To date, haven't had an infection yet.
Steve W (in Aus)



Re: storing dried yeast


abe865fdecdefg235726816 wrote:
Quoted text here. Click to load it
I've only used dry yeast a few times, and just used the whole pack.  You
want the most yeast you can to get a good strong fermentation started.
The only times I've had open packages is when I've made soda.  I just
put the opened pack in a zip top bag and stuck it back in the fridge for
another batch (actually a few) of soda.  If you make bread, you could
add it to your bread yeast.  I've done this a few times.  Otherwise, dry
yeast is cheap, so just toss it out.
Cheers,

--
Michael Herrenbruck
Herrenbruck Brewery

Re: storing dried yeast


"abe865fdecdefg235726816"
Quoted text here. Click to load it

Yeah, you can use a partial pack, it works for me.  As a matter of fact, I
just used the second half of a pack of Nottingham that I opened 6 months ago
for my latest batch, and it turned out just fine.  When you first open the
packet, just be careful and don't play around with the inside of the packet,
to minimize any risk of contamination.  Use whatever amount you need, then
fold over the open end of the packet and tape it shut, and keep it in the
fridge.  It will probably keep for a year or two.  Dry yeast is so cool like
that.

--
Dave
"Fill your cup with whatever bitter brew you're drinking." -- Brad Paisley



Re: storing dried yeast


Quoted text here. Click to load it

I'd feel comfortable storing it for up to a year, but I'd start to get
a little concerned after that.  I've only had dry yeast fail to start on
me a couple of times, but the most recent was a packet that had been in
the fridge somewhere around 1-2 years.  I didn't do much brewing after we
had our kids, and these were sitting around in the fridge when I started
back up.  I don't know the exact timeframe, but it was in the ballpark of
a couple years.

IMO, there's definitely a point where viability becomes an issue.  Doubly
so if you're trying to get away with using partial packets.


John.

Re: storing dried yeast


On Sat, 31 Mar 2007 11:12:45 -0400,
Quoted text here. Click to load it

Why not use the whole packet?

Quoted text here. Click to load it

I store unopened packets in the fridge.  I guess you could store a
partially used one the same way.  Try to close it back up (or put it in
a ziplock bag, etc) and put it in the fridge.

Quoted text here. Click to load it

If you store them too long the viability goes way down (the yeast starts to
die) and you can have problems with the fermentation.  IMO, using a partial
packet isn't a good idea anyway unless you're making really small batches.
A partial packet is already going to be under pitching before you take
into account any viability issues.  The standard packet size is around
10 grams, and is designed for a 5 gallon batch.  Even if you're doing
something like 3 gallon batches, I'd still use the whole packet.  Dry yeast
is so cheap that trying to split a single packet up doesn't seem worth the
trouble.


John.

Site Timeline