"Isabella Woodhouse" > wrote in message
...
>
> I was just wondering if vinegar loses any of its acidity after it sits
> (unopened) on the shelf awhile?
>
> Isabella
>
How old? How big an airspace, how many times opened (big jug = many times?)?
I knew I should have checked something with that truly ancient cider
vinegar before I tossed it last month. Joy of Pickling mentions that vinegar
is more evaporative than water, so speaking from a layperson's point of
view, I think it would depend on how truly ancient (the aforementioned was
probably over 8 years old), how many times you'd opened it, and the general
heat or something of the storage and kitchen used.
I know I've had unopened gallon jugs of vinegar maintain their integrity
for 3 years so far. That being a better quality commercial wine vinegar. No
mother or anything.
Overall, I'd increase the ratio of vinegar to water, if that applies, or
just toss it and buy some more. 'Specially if it looks or tastes off. m2cw
Edrena