Aqua Mira expiration date? does it go bad, it is just

[1234]

phosphoric acid and chlorine dioxide. The chemicals do not go bad why the expiration date? It still turns yellow. It just makes oxygen and that oxygen kills all the bad stuff.
OK some of you chemistry buffs.
Does anyone use Hydrogen peroxide to treat water? 53% or 3% how much per liter?

[MuddyWaters]

phosphoric acid and chlorine dioxide. The chemicals do not go bad why the expiration date? It still turns yellow. It just makes oxygen and that oxygen kills all the bad stuff.
OK some of you chemistry buffs.
Does anyone use Hydrogen peroxide to treat water? 53% or 3% how much per liter?


It does not make oxygen, and that is not what " kills the bad stuff"
It is a solution of 2% sodium chlorite, and 5% phosphoric acid
When combined it makes chlorous acid, which degenerates into chlorine dioxide.
Over time the chlorine dioxide will decompose into chlorite and chloride
pH, temperature, UV exposure, etc all determine how quickly, and what the equilibrium points are of the reactions

hey put an expiration date on water too. Its only a few billion years old.
They do it because they are required to.

It is also possible to change concentration due to evaporation loss even in sealed containers. The seals arent perfect. Over years, the concentration can change to the point where it doesnt work as intended.

[johnnybgood]

[QUOTE=MuddyWaters;1455588]It does not make oxygen, and that is not what " kills the bad stuff"
It is a solution of 2% sodium chlorite, and 5% phosphoric acid
When combined it makes chlorous acid, which degenerates into chlorine dioxide.
Over time the chlorine dioxide will decompose into chlorite and chloride
pH, temperature, UV exposure, etc all determine how quickly, and what the equilibrium points are of the reactions[QUOTE]

Chemistry was always a tad bit perplexing in school.

Thanks for the refresher course in chemical decomposition .

[Another Kevin]

I'd imagine that the chlorite might oxidize the plastic container slowly (and hence be reduced over time). But the expiration date may be more on the container than the content - old squeeze bottles are likely to crack and leak, particularly ones that are exposed to harsh chemicals.