couple of yeast questions?

mikemcdeedy100

hi
new to homebrew


just wondering

if i open a packet of yeast and don't use it all -does it keep?

and whats the sell by date normally on yeast?

do i have to buy like one packet at a time or can i stock up a bit

thanks

BeerNut

mikemcdeedy100 wrote: »

if i open a packet of yeast and don't use it all -does it keep?

No, you're running a hygiene risk keeping it open.

mikemcdeedy100 wrote: »

whats the sell by date normally on yeast?

It's usually a few months, maybe a year, but I've used yeast that's over a year out of date with no problems.

mikemcdeedy100 wrote: »

can i stock up a bit

You can. Keeping the packets in the fridge helps too.

mikemcdeedy100

BeerNut wrote: »

No, you're running a hygiene risk keeping it open.

thanks

what if i seal it airtight with clingfilm ?

does it basically have to be used when you open the packet?

Shiny

Are you doing small batches or something in terms of why you are using partial packets of yeast?

mikemcdeedy100

i was hoping to start small maybe 5L or less in case i mess up

although i might scale up to the 25L drum

BeerNut

I've always used a whole packet in 5L batches and never had a problem.

Use a whole packet per batch, whatever the size. Once the sachet is open it's not sanitary.

mikemcdeedy100

thanks

so all the cleaning and sterilization of equipment involved in homebrew?

is that due to health risks or to improve the taste of the 'finished product'

or both

thanks

BeerNut

The second one. There aren't really any health risks (apart from the alcohol). If a brew goes wrong because of bad hygiene it can taste of TCP, vinegar, baby vomit and a whole host of other off flavours that aren't harmful but are disgusting.

mikemcdeedy100

lol thanks