so I accidentally froze my (diluted) StarSan jug

[Hoochin'Fool]

I mix up my StarSan solution in 1 gallon plastic jugs of distilled water, and then use those to fill up a spray bottle. I also keep extra 1 gallon plastic jugs laying around, to fill with tap water and freeze them, for my swamp cooler/fermenter. Since I was brewing today, I tossed a couple of these jugs in the freezer last night, and just now, when I was going to rotate the frozen jugs, I noticed I'd frozen 3/4 gallon of StarSan (somehow I missed the "StarSan 7/7/25" I'd sharpie'd on it).

Did I ruin 3/4 gallon of StarSan? It's still frozen solid, but I'm thinking once it thaws, if it still looks as foamy when shaken as it usually does, it's probably ok...

 

[day_trippr]

The known components in Star San are phosphoric acid, dodecylbenzenesulfonic acid (DDBSA), and propylene glycol. I don't think any of them is going to be permanently altered by freezing. Once thawed and given some agitation it should reintegrate without issue.

Cheers!