Will StarSan go bad? - Home Brew Forums
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Old 06-01-2012, 08:08 PM   #1
jkendrick
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I have a bucket of 2.5 gallons of water and StarSan that I used a few days ago to sanitize my hydrometer and wine thief to take a gravity reading. I've left it out uncovered over the past few days with the intention of using it to sanitize these items for another gravity reading. But as I was about to do that, I thought is there a chance the StarSan could lose its effectiveness from being left out. I don't want to chance it to save a bit of StarSan so I dumped it and created a new solution, but thought I'd ask what you all thought.



 
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Old 06-01-2012, 08:20 PM   #2
Phyrst
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Test the pH. If it's less than 3 it's still good.



 
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Old 06-01-2012, 08:22 PM   #3
mattmcl
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If you mix it up with distilled water and keep it in an airtight container it will keep for months. Toss it when it gets cloudy.
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Old 06-01-2012, 08:25 PM   #4
JeepDiver
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Quote:
Originally Posted by mattmcl
If you mix it up with distilled water and keep it in an airtight container it will keep for months. Toss it when it gets cloudy.
Wrong, with my water it gets cloudy about 5 mins after I mix it. Depends on your water. Best way to tell is test the ph

 
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Old 06-01-2012, 09:04 PM   #5
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...which is why I suggested mixing it with distilled water. After a couple years of testing mine, I gave up when I noticed that clear water=good star san and cloudy water=bad star san.
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Old 06-01-2012, 09:19 PM   #6
Markd27
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Quote:
Originally Posted by mattmcl View Post
...which is why I suggested mixing it with distilled water. After a couple years of testing mine, I gave up when I noticed that clear water=good star san and cloudy water=bad star san.
Cloudy does not equal bad in all cases. Mine is cloudy the second I mix it if using tap water. The ONLY way to determine its effectiveness is to test its ph level.

 
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Old 06-01-2012, 09:29 PM   #7
Handsaw
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What do you use to test the ph of the solution? I bought some test strips at my lhbs but they only go down to 4.6.

 
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Old 06-01-2012, 09:32 PM   #8
b-boy
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I've kept some Starsan around for more than a month and it was fine. Be careful how you store it though. I used a milk jug and it ate a hole right through it. Made a mess in my cabinet.

 
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Old 06-01-2012, 09:43 PM   #9
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Quote:
Cloudy does not equal bad in all cases. Mine is cloudy the second I mix it if using tap water. The ONLY way to determine its effectiveness is to test its ph level.
True, if you use tap water. In my experience, if you use distilled water cloudy always equals bad, and clear always equals good.

And yes, you should store it in a glass container. Pickup a 2 gal carboy sometime, they're perfect.
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Old 06-01-2012, 10:09 PM   #10
TimTrone
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Quote:
Originally Posted by mattmcl

True, if you use tap water. In my experience, if you use distilled water cloudy always equals bad, and clear always equals good.

And yes, you should store it in a glass container. Pickup a 2 gal carboy sometime, they're perfect.
I agree. I use distilled and pitch it when it gets cloudy. I usually get about 3-4 batches out of 1 mix. Better safe than sorry



 
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