Litt googling:
http://www.beersmith.com/forum/index.php?topic=12788.0
Sakset:
First of all, thank you for contacting Five Star Chemicals and for bringing this matter to our attention. The head chemist and I looked over the information you sent and we want to replace the new bottle of Starsan you purchased. Starsan has a shelf life of about 12 months, which may account for the cloudiness from the older bottle of Starsan. However, based on your water profile, nothing indicates that the newly acquired bottle of Starsan would produce cloudy solution as well. Because of this we want to ship out to you a replacement bottle; please let me know the size of the bottle and your shipping address. We can include in the package a return label if you don't mind sending us back the bottle we're replacing for the chemist to run some tests and quality control checks. I sincerely apologize for any inconvenience this may have caused.
You are correct that as long as the solution maintains the pH of 3.5 or below, it is working as intended. But since this case seems to be a bit of an anomaly we are more than happy to replace your Starsan which should eliminate the cloudy solution problem. We greatly appreciate your business and I look forward to hearing back from you so we can get your product replaced!
*Edit: Og noen linker lengre ned førte til dette:
http://www.homebrewfinds.com/2011/09/tip-using-star-san-in-spray-bottle.html
Sakset:
How long is Star San good for?
Star San (diluted sanitizing solution) needs to remain under pH 3 AND be crystal clear. If your solution of Star San gets cloudy, according to Five Star, it may not be effective. Hard water will make the solution go cloudy quickly. If this is happening to you, use distilled water.
Some will say that the clear part is not important. Here’s the information I’ve gotten from Five Star Chemicals on that: “
The cloudy solution could be okay, but it could be bad. The cloudiness is the surfactant coming out of solution. It has reacted, or is reacting with the metals in the water. I don’t know if it is still good, because I don’t know how much surfactant has reacted. I error on the side of caution and suggest that you don’t even mess with it. Use DI water.”
En god dose forvirring altså.
Og en siste Edit:
http://thebrewingnetwork.com/forum/viewtopic.php?f=10&t=11811