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Old 07-26-2013, 06:40 AM   #21
Feb 2012
Tacoma, WA
Posts: 41
Liked 1 Times on 1 Posts

Originally Posted by DanH View Post
I'd drink it. It's was diluted to a safe level with water, and then you further diluted it beer.
Agreed. Fear no beer. Diluted star-san or not.

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Old 07-26-2013, 07:02 AM   #22
Feb 2011
Vancouver, British Columbia
Posts: 774
Liked 123 Times on 87 Posts

Email 5star! they have awesome customer service and will get back to you. I've had star-san poisoning panic in the past. Here is the redacted response I got from star-san. Note the response time.

----- Forwarded Message -----
Sent: Thursday, September 1, 2011 10:59:51 AM
Subject: RE: Star San and Copper safety?


You will be fine. Yes, Star San will shine copper up nicely. It might have pulled some oxalate off of the copper. This will not harm you. The metallic odor could be many things. It is probably the star san cleaning the copper. This is not toxic.

Five Star

From: GBX
Sent: Wednesday, August 31, 2011 9:42 PM
To: Support
Subject: Star San and Copper safety?


Last night I was bottling some homebrew and I had a tub of star san for sanitizing bottles and hoses. While I was siphoning into the bottling bucket I left the copper hose connector from the spigot soaking in the star san for about 10 or 15 minutes. After I removed it from the star san it was a bright copper colour (like a shiny new penny). I then reassembled the bottling bucket spigot and proceeded to bottle, giving every bottle a quick star san rinse immediately before filling. When I was done I noticed the star san had a slight metallic odour and when cleaning up I noticed that the copper hose connector had the same odour (but much stronger) as did my hands after touching it. Did I leach copper or some other toxic compound into the star san? Did I then contaminate every bottle with the final rinse before bottling? I didn't notice any change in Star San colour but it could have been missed due to that suds. I've heard about yeast precipitating out metals, but this is a hefeweizen and we will be drinking the yeast. Should this be something I concern myself with (and dump the batch) or am I over reacting?

I appreciate any feedback you can give. Thanks,

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Old 07-26-2013, 01:41 PM   #23
Nov 2007
Posts: 1,437
Liked 174 Times on 148 Posts

I wouldn't expect 5-Star to tell you it's safe to drink, even if it is. Since it's not made for drinking, they probably won't want to claim it's safe to drink. Liability and all. Hopefully they'd be willing to share anecdotes though.

I'd be just as worried about what it did to the beer's taste.
No one gives a doggy doo, about your stupid home brew.

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Old 07-26-2013, 06:02 PM   #24
Feb 2011
Robards, Kentucky
Posts: 421
Liked 91 Times on 58 Posts

Star San doesn't need to be broken down to be yeast food. The phosphoric acid is a source of vital inorganic phosphate that all living things need to do the chemistry of life. Just by diluting it you make it yeast food.

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Old 07-26-2013, 06:35 PM   #25
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Feb 2011
Sheffield, Ohio
Posts: 38,990
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It was my impression that "breaking it down" made it non acidic or something? So the acidic form is the nutrient? I loooked on five star's site & found this tech sheet. It contradicts all we've been told...unless it means these things happen in it's concentrated form?'s the link to the tech sheet;
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Old 07-26-2013, 08:28 PM   #26
daksin's Avatar
Aug 2011
San Diego, CA
Posts: 4,617
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I really think you're fine. There's plenty of phosphoric acid in sodas, and likely less in the beer you've diluted it in. Just taste it.
I can't be arsed to keep up this list of what's in the fermenters, but hey, check out the cool brewery I own! .. ..

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Old 07-26-2013, 09:01 PM   #27
fosaisu's Avatar
Apr 2012
Denver, CO
Posts: 690
Liked 108 Times on 88 Posts

Another vote for "you're fine, drink up." You've just diluted some already diluted acid with 4.75 gallons of beer.

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