Recently, I was sold CDS liquid chlorine that was 1.5 years old (ACE Hardware), which is well past expiration. Be sure to check before you buy. You can learn more about expiration dates on bottles here - How to Tell When a Bleach Bottle Was Made | Clorox®. Liquid chlorine/bleach expires after one year.
Check the exp. date on liquid chlorine and bleach!
- Thread starter Tonyd142002
- Start date
Ugh, that’s annoying! That‘s one reason I like filling up at Pinch a Penny - their supplies are much fresher, especially with our long pool season.
Chlorine doesn't expire, it continuously loses strength after it is produced. If stored out of sunlight in a cool environment it can remain potent for quite some time and as the potency drops the rate at which it drops decreases. When my new pool was finished I used some 12.5% chlorine that had sat outside for a year in the cardboard case and the result indicates it was still about 6% chlorine.
Always check dates and get as fresh as you can for maximum strength and longevity, but there is no reason old product cannot be used and Clorox is off-base claiming that liquid chlorine "expires".
Always check dates and get as fresh as you can for maximum strength and longevity, but there is no reason old product cannot be used and Clorox is off-base claiming that liquid chlorine "expires".