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-   -   Star San Solution life (http://www.homebrewtalk.com/f11/star-san-solution-life-50736/)

BrooZer 01-10-2008 02:28 PM

Star San Solution life
 
CAn i leave a solution of star san in a spray bottle for a few days. This way i can spray it on anything I need or open the bottle and dump some out to use. Im going to put some in the spray bottle anyway so i was wondering how long it can sit.

Thanks!

robnog 01-10-2008 03:44 PM

I think it stays good for weeks and maybe even months. I leave about a gallon in a pot that I use to sanitize keg parts, airlocks, etc.

You can tell when it starts to go off because it gets cloudy.

Funkenjaeger 01-10-2008 03:46 PM

Yes, lots of people do this. If you search you should find plenty of examples. Starsan remains effective as long as it's clean and clear and the pH is below a certain level - I think it's 3.

Evan! 01-10-2008 03:47 PM

I don't think cloudiness has anything to do with it. Mine gets cloudy when I leave any plastics in it for awhile (even quicker if I sanitize some bottles that have silkscreened labels, like stone or rogue)---but it's still effective. I just add an ounce or so to my 17-gallon bucket of solution every couple weeks. Once it gets cloudy enough, I'll dump it and make a new batch.

jcb317 01-10-2008 04:29 PM

Mixing star san in distilled or RO water will extend the shelf life, but the best way to check viability is checking PH as said above.

Funkenjaeger 01-10-2008 05:06 PM

Quote:

Originally Posted by Evan!
I don't think cloudiness has anything to do with it. Mine gets cloudy when I leave any plastics in it for awhile (even quicker if I sanitize some bottles that have silkscreened labels, like stone or rogue)---but it's still effective.

From the man himself:
http://www.realbeer.com/discussions/...threadid=10932
Quote:

Originally Posted by Charles Talley
First it is still active as long as the pH is below 3, and the solution is clear. When the solution turns cloudy the soap in Star San has reacted with the mineral in the make-up water and has made the final solution useless.

My 32oz bottle cost me about $16, so it costs me 10 cents a gallon to mix up solution. ANY time that I use it and have ANY doubt whether it got contaminated at all I don't hesitate to throw it out. For the price, I don't lose any sleep over getting only a single use out of it once in a while when sanitizing certain things, especially since MOST of the time I can reuse it many times.

BrooZer 01-10-2008 09:38 PM

So if my solution is greenish does that mean it came in contact with soap? I take it that it is bad then.

Chriso 01-10-2008 09:56 PM

Don't know about greenish. But as far as spray bottles are concerned, since a spray bottle is a closed environment, if you mix it at the correct concentration, and if you use "good" water (e.g. distilled, RO, I even just use anything "bottled") it should last virtually indefinitely as long as contamination is prevented..

I said virtually, use your common sense of course. When in doubt, make a new batch, right? :D

Kevin Dean 01-10-2008 10:08 PM

That line from Charley about SS turning cloudy making it useless... If this is true, we don't need to sanitize, since almost every BIT of Star San I've ever used has been cloudy. It turns cloudy for me after about 5 hours and if that statement is as true as he says (being useless) then I need to investigate other sanitizer options (or start a "sanitization is pointless" trend.).

Jim Karr 01-10-2008 11:34 PM

I've got a batch of SS in my spray bottle that I've used for months. When I shake it, and it still gets foamy, I think it's still OK. It still has that "smell" when I spray it on a surface.


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