A bottle of cleaning vinegar
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Does Cleaning Vinegar Ever Expire?
Cleaning vinegar like the distilled white variety boasts an impressively long shelf life and doesn't technically expire, thanks to its acidic nature that makes it self-preserving.
This characteristic means you can safely store cleaning vinegar indefinitely, even outside the refrigerator, without worrying about it spoiling or becoming harmful.
Although vinegar bottles come with a "best by" date, this is merely an indication of peak freshness and not a measure of safety. You can use it past this date without any worries.
Over time, while the physical appearance of cleaning vinegar remains largely unchanged, its efficacy as a cleaning agent might wane due to the gradual evaporation of acetic acid.