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As I said in my intro, we had a stockpile of some food and materials but didn't keep up on them. Well, I went through my stock to see what we have and what we need. I have an unopened bottle of bleach for all its uses. But there isn't a date on the bottle.



Does bleach go bad? I would think that if it was opened it could lose potency because of oxidation, but does a sealed bottle of bleach have to be rotated out of the supplies?



Thanks. I looked on the Clorox web page, and Google, but didn't find anything about this.
[quote name='fritz_monroe' post='171316' date='Oct 24 2007, 03:41 PM']As I said in my intro, we had a stockpile of some food and materials but didn't keep up on them. Well, I went through my stock to see what we have and what we need. I have an unopened bottle of bleach for all its uses. But there isn't a date on the bottle.



Does bleach go bad? I would think that if it was opened it could lose potency because of oxidation, but does a sealed bottle of bleach have to be rotated out of the supplies?



Thanks. I looked on the Clorox web page, and Google, but didn't find anything about this.[/quote]



Hi,



This is an excellent question! I came upon this information from the Cornell.edu website where they asked a Clorox representative and here is their answer:



"We recommend storing our bleach at room temperatures. It can be stored for about 6 months at temperatures between 50 and 70 degrees Fahrenheit. After this time, bleach will be begin to degrade at a rate of 20% each year until totally degraded to salt and water. Storing at temperatures much higher than 70 degrees Fahrenheit could cause the bleach to lose its effectiveness and degrade more rapidly. However, if you require 6% sodium hypochlorite, you should change your supply every 3 months."



You can read more here: [url="http://www.med.cornell.edu/ehs/faq/biological_safety.htm"]http://www.med.cornell.edu/ehs/faq/biological_safety.htm[/url]
Well that sucks. So every 3 months I need to get another bottle of bleach. I guess that sells me on the water purification tablets. They still expire, but it's 5 years instead of 3 months. Granted, you can treat a lot more water with a bottle of bleach than water purification tablets, but in a long term situation, I'd probably boil it if I needed to treat large quantities of water.
Yes, I wonder how many other people are / were depending upon bleach to last alot longer. Thank you for bringing up the question.

Guest

RobertRogers:



Thanks very much for the superior information. This is an excellent contribution to the fabric of the Forum. One of the Moderators to move this to the FAQ section.



--ML
Wow.. I didn't know that! <img src='http://www.hoodswoods.net/IVB/public/style_emoticons/<#EMO_DIR#>/unsure.gif' class='bbc_emoticon' alt=':unsure:' />
20% each year should be easy enough to trend and account for by increasing dose strength.

I wonder if there's an easy way to test.
You've opened up a big question on chemical water purification for long term needs. I suggest using the search feature, then if you have questions, well we are not going anywhere!
I had a bottle of Clorox untouched under my cabinet for a few years. Noticed some crusting on the label. Had to dump some down the drain to kill some bad smells in garbage disposal. It noticeably lacked that chlorine smell, so I sent the whole shebang down in a couple of doses.



It may be good to write the purchase date or write your own expiration date, (today + 4 years) directly on the bottle. (didn't Karen do something like this in UM1)

Guess I'm going to get some copper tubing stored away for water distillation (plan B ).