Bleach Solution Goes 'Bad' ?

Thread Starter

MrAl

Joined Jun 17, 2014
13,704
Hi,

I have been reading about using bleach for disinfecting and i found that many people were saying that you have to mix a fresh batch of bleach and water each day for best germicidal performance.
So i checked on the Clorox site, and sure enough they say to mix a fresh batch daily.
Make sense?

Also, i read now that many plastic bottles are ruined rather quickly with bleach solution in them because the spray mechanism gets damaged from the bleach.

Any ideas either one of these issues?
 

402DF855

Joined Feb 9, 2013
271
Not a chemist but it might just be Clorox wanting you to use more product. OTOH, bleach gives off a strong vapor, so perhaps it looses strength, if it is in an open container. I have a Clorox spray bottle and the sprayer definitely is non functional now. Very irritating.
 

MaxHeadRoom

Joined Jul 18, 2013
30,659
The mistake i made was to use it on my semi-auto beer bottle filler to sterilize, the unit contained a small aluminum part.
I left it to soak in a diluted solution, the Bleach dissolved it.! :(
Max.
 

shortbus

Joined Sep 30, 2009
10,050
I have been reading about using bleach for disinfecting and i found that many people were saying that you have to mix a fresh batch of bleach and water each day for best germicidal performance.
Thta's what they told us, my wife and I, back when we had to go to "home dialysis school". She needs to wipe down both her "port tube" the solution bag's ports and her machine every time she hooks up. They said for the bleach water to be effective it had to be newly mixed every time. It's a pain in the @$$, but so far it's kept her healthy and doing the procedure at home instead of the clinic.
 

dl324

Joined Mar 30, 2015
18,326
So i checked on the Clorox site, and sure enough they say to mix a fresh batch daily.
Make sense?
It's them covering their a** and selling more bleach. Put the bulk of your mixture in an opaque container and store it in a cool dark place. Just like you do for your bleach.

Used bleach to clean a thermos bottle and ruined it. The fine print on the box for the new one said to not use bleach to clean it...
 

Thread Starter

MrAl

Joined Jun 17, 2014
13,704
It's them covering their a** and selling more bleach. Put the bulk of your mixture in an opaque container and store it in a cool dark place. Just like you do for your bleach.

Used bleach to clean a thermos bottle and ruined it. The fine print on the box for the new one said to not use bleach to clean it...
Hi there,

Actually it is a fact i am pretty sure that bleach dissipates in water (and even by itself), i just dont know the actual time frame. I am pretty sure because you can use it to disinfect water for drinking.
Also, i think it turns clear and has no smell when it dissipates all its chlorine.
I have read now that even the bleach itself full strength can dissipate . It depends on temperature and exposure to light. The higher the temperature, the faster bleach dissipates even at full strength.
Clorox says that it is good for at least 6 months in most cases, but the simple test it to smell the bleach and see if it has the strong smell. You can smell it as soon as you open the bottle when it is fresh.

I didnt realize there was so much to know about bleach because i never used it for a disinfectant i had been using alcohol for years.
 

Thread Starter

MrAl

Joined Jun 17, 2014
13,704
The mistake i made was to use it on my semi-auto beer bottle filler to sterilize, the unit contained a small aluminum part.
I left it to soak in a diluted solution, the Bleach dissolved it.! :(
Max.
Wow that bites. I bet the new filters are expensive.
Do you know if it is a nano filter?
 

dl324

Joined Mar 30, 2015
18,326
Actually it is a fact i am pretty sure that bleach dissipates in water (and even by itself), i just dont know the actual time frame.
It's certainly longer than a day.
I am pretty sure because you can use it to disinfect water for drinking.
In that case, you're less than a dozen drops per gallon of water. I think I recall reading 8.
 

Thread Starter

MrAl

Joined Jun 17, 2014
13,704
It's certainly longer than a day.
In that case, you're less than a dozen drops per gallon of water. I think I recall reading 8.
Hi again,

Yeah i think i read 2/3 cup per 1000 gallons which is a very very low ratio.
Yeah i would bet it is longer than a day too, but i can do some experiments to find out for sure. There is also a difference in the concentrations purchased they are no all the same i have read now.
Never thought bleach could be so complicated :)
 

dl324

Joined Mar 30, 2015
18,326
Never thought bleach could be so complicated
They started making concentrated bleach a while ago; probably so they could increase the price and get people to use more without them noticing.

The same goes for a "gallon" bottle of bleach. It's not a gallon anymore. Another way they can increase price without people noticing.

For the past few years, I've noticed that bleach no longer smells like bleach. Maybe the store was selling expired stock. Who'd've thought you needed to check expiration dates on bleach?

After having to buy different brands of toilet paper, I found that most of them talk about the number of sheets on a roll; but they all use different sheet sizes. And there is a difference in quality. None of the brands we've been forced to buy since the shortages have been as good as the brand we used before.
 

Thread Starter

MrAl

Joined Jun 17, 2014
13,704
They started making concentrated bleach a while ago; probably so they could increase the price and get people to use more without them noticing.

The same goes for a "gallon" bottle of bleach. It's not a gallon anymore. Another way they can increase price without people noticing.

For the past few years, I've noticed that bleach no longer smells like bleach. Maybe the store was selling expired stock. Who'd've thought you needed to check expiration dates on bleach?

After having to buy different brands of toilet paper, I found that most of them talk about the number of sheets on a roll; but they all use different sheet sizes. And there is a difference in quality. None of the brands we've been forced to buy since the shortages have been as good as the brand we used before.
Yeah i noticed that too it is not a gallon it is 121
 
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