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Brews & Views Bulletin Board Service * Brews and Views Archive 2008 * Archive through May 30, 2008 * Old Lactic Acid < Previous Next >

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Bill Ballinger
Junior Member
Username: Willy_bill

Post Number: 49
Registered: 01-2006
Posted From: 40.0.40.10
Posted on Wednesday, May 21, 2008 - 02:36 pm:   Edit Post Delete Post View Post/Check IP    Ban Poster IP (Moderator/Admin only)

Can lactic acid go bad over time? I just found an old (2+ years) bottle of the ID Carlson 88% Lactic acid. Is it safe to use? Same strength?
 

Bill Pierce
Moderator
Username: Billpierce

Post Number: 8886
Registered: 01-2002
Posted From: 24.57.225.170
Posted on Wednesday, May 21, 2008 - 02:39 pm:   Edit Post Delete Post View Post/Check IP    Ban Poster IP (Moderator/Admin only)

I bought a liter of 88 percent lactic acid eight years ago. I'm still using it to adjust the pH of my sparge water; it doesn't seem to have lost any potency as far as I can tell.
 

Vance Barnes
Senior Member
Username: Vancebarnes

Post Number: 3205
Registered: 03-2003
Posted From: 74.7.7.66
Posted on Wednesday, May 21, 2008 - 03:01 pm:   Edit Post Delete Post View Post/Check IP    Ban Poster IP (Moderator/Admin only)

The only thing that would possibly happen is that it might have lost a little water. But at 88% lactic there's not much water to start with.

Oh, and as long as it hasn't had anything caustic contaminate it and neutralize it. pH papers would tell you if it's still acidic.