how long will opened distilled water last? - Home Brew Forums
Register Now For Free!

Home Brew Forums > Food and Beverage > Cheese Making Forum > how long will opened distilled water last?

Reply
 
Thread Tools
Old 09-18-2011, 08:20 PM   #1
jigidyjim
Recipes 
 
Mar 2009
Oakland, CA
Posts: 696
Liked 3 Times on 3 Posts



I had to buy a gallon of distilled water to use 6 Tbps... how long will it last? I rarely make cheese, so not sure if I should bother keeping it or not.

 
Reply With Quote
Old 09-19-2011, 01:09 PM   #2
Nateo
 
Nateo's Avatar
Recipes 
 
Jul 2010
Bennett Springs, MO
Posts: 2,050
Liked 39 Times on 30 Posts


Distilled water should be darn near 7 pH. That's pretty acidic as far as water is concerned. Probably too acidic for it to "go bad."
__________________
To paraphrase Dr. England - "Off-flavors smooth with time. So do mountains. Brew it right from the start!"

My blogsite: http://nateobrew.blogspot.com/

 
Reply With Quote
Old 09-20-2011, 05:56 PM   #3
wildwest450
Registered User
Recipes 
 
Dec 2007
Posts: 9,043
Liked 173 Times on 158 Posts


Use it to make up some star san.

_

 
Reply With Quote
Old 09-20-2011, 11:55 PM   #4
Malstorme
Yeast-herder
HBT_LIFETIMESUPPORTER.png
 
Malstorme's Avatar
Recipes 
 
Apr 2011
Sapulpa, OK
Posts: 56
Liked 3 Times on 2 Posts


Quote:
Originally Posted by Nateo View Post
Distilled water should be darn near 7 pH. That's pretty acidic as far as water is concerned. Probably too acidic for it to "go bad."
Distilled water IS right at 7pH but that is neutral, not acidic. As for "keeping" it, at 89 cents a gallon what's the point? +1 on mixing up some Starsan...

Mals

 
Reply With Quote
Old 09-21-2011, 12:20 AM   #5
Nateo
 
Nateo's Avatar
Recipes 
 
Jul 2010
Bennett Springs, MO
Posts: 2,050
Liked 39 Times on 30 Posts


Quote:
Originally Posted by Malstorme View Post
Distilled water IS right at 7pH but that is neutral, not acidic. As for "keeping" it, at 89 cents a gallon what's the point? +1 on mixing up some Starsan...

Mals
If the distilled water is exposed to the atmosphere, then the CO2 present in the atmosphere will turn into carbonic acid in the water as it's absorbed. The pH of the solution will eventually end up around 5.2 if left alone long enough.

Distilled and RO water is corrosive. Generally, drinking water, if treated by municipal plants, has a pH of 7.5-8, in order to reduce corrosion of the city's pipes. That's why I said it's "pretty acidic" compared to normal municipal drinking water.
__________________
To paraphrase Dr. England - "Off-flavors smooth with time. So do mountains. Brew it right from the start!"

My blogsite: http://nateobrew.blogspot.com/

 
Reply With Quote
Old 10-07-2011, 02:22 AM   #6
StMarcos
Recipes 
 
Apr 2008
Sebastopol, CA
Posts: 978
Liked 35 Times on 28 Posts


I've got some that's over 4 billion years old, and it's still good.

ArizonaDB Likes This 
Reply With Quote
Reply
Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Heating Water in sink for cheese thdewitt Cheese Making Forum 5 11-20-2010 04:06 PM
After A Long Wait, I'm In HenryHill Cheese Making Forum 2 06-06-2009 03:19 PM


Forum Jump