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Discussion Starter · #1 ·
My wife thinks that by freezing my camelbak with some water in it before I ride, I may be causing chemicals (from the plastic reservoir) to leach into the water/ice within the reservoir. Anyone else care to offer a differing opinion or perhaps agree with her? Thanks.
 

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I'm a chemist

Very small quantities of chemicals used to manufacture plastics do leach into the water they contain, for any plastic container. More of these chemical impurities will leach into the water at higher temperatures and longer exposure times. Almost no leaching can occur between plastics and ice.

No one knows for sure what the long-term effects of exposure to these sorts of chemicals will be, but when put into perspective of all other risks we face, you really have nothing to worry about.
 

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Missing in Action said:
I'm a chemist

Very small quantities of chemicals used to manufacture plastics do leach into the water they contain, for any plastic container. More of these chemical impurities will leach into the water at higher temperatures and longer exposure times. Almost no leaching can occur between plastics and ice.

No one knows for sure what the long-term effects of exposure to these sorts of chemicals will be, but when put into perspective of all other risks we face, you really have nothing to worry about.
Chemist here as well, I have to agree with the above. The amounts that leach are in the parts per billion level and are negligible. Toxicity is associated with high levels or dose of the toxin, i.e. bisphenols (from polycarbonates bottles) not sure about camelbaks however. Almost anything at higher doses can be considered toxic like aspirin, etc. hope that helps anyhow..
 

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BMF
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protocol_droid said:
I'm a medicinal/organic chemist. How about you guys.. I know it's off topic now.
Not off-topic considering the title of the thread. After getting my BS in chem I spent some time in the lab but quickly moved into molecular bio and genomics. That was years ago, haven't put on a lab coat in a long time, except when visiting folks working in the lab.

Like Brewmaster I put my background in biochem to use making frothy beverages at home, or at least I am assuming brewmaster is cooking up some sort of malty goodness.

Like the rest here, I don't see any problems with freezing water in your hydration bladder other than the ice that forms could scratch the inside of the bladder, creating rough surfaces that would be more likely to harbor bacteria or mold. That would be if you got a block of ice in there, and then moved the bladder around. I like to put only water in my bladder and I just empty it out and rinse with water occasionally - I never put sports drinks in it or clean it with a brush, and it stays super clean and doesn't get scratches. Once you scratch it up I think you have to be more vigilant and clean it with a brush and soap periodically, especially if you use sports drinks in it.
 

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I agree with the above replies. Your wife should be more worried about the air pollutants you inhale while ridding.

I have a BS in chemistry and a BS in biochemistry, just graduated last year. Now I am working on my Masters in chemical engineering.
 

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MolarM
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I've got a BS in Chem as well. And now I can tell you that you can use an Efferdent tablet(denture cleanser) to help cleanse a Camelback bladder. Just remember to rinse thoroughly before refilling. :thumbsup: MM
 

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I'm a chemist too (pharmaceutical product development)! Who knew there were so many of us here? I wash new bladders with dish soap to mitigate the new bladder smell. This would remove more plasticizer than many normal rinse/use cycles. Regardless, as previously mentioned, we are talking about extremely low levels in food contact materials.
 

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Torque Wrench said:
I'm a chemist too (pharmaceutical product development)! Who knew there were so many of us here? I wash new bladders with dish soap to mitigate the new bladder smell. This would remove more plasticizer than many normal rinse/use cycles. Regardless, as previously mentioned, we are talking about extremely low levels in food contact materials.
After some time in the lab, I would imagine most bench chemists at least non ph.d's tend to move onto other venues, like mba's or pharm development like you. Did you get another degree to assist the move into product development?

BTW, I've an MS with almost 10 yrs experience in the lab...bout time to try something new.

And yes, it's cool that there are so many chemists!!!
 

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Team Hardcore Cornbread
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I am no chemist but one positive side of freezing your Camelback is nastly little bugs such as legionella love to grow in water around 65 degrees F. It could be a possibility depending on where you get your water.
 

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protocol_droid said:
After some time in the lab, I would imagine most bench chemists at least non ph.d's tend to move onto other venues, like mba's or pharm development like you. Did you get another degree to assist the move into product development?

BTW, I've an MS with almost 10 yrs experience in the lab...bout time to try something new.

And yes, it's cool that there are so many chemists!!!
After 10 years as an analytical chemist I needed a change. 17 years ago with bachelors in biology and chemistry, without any pharmaceutical experience, I landed in the right place at the right time.
 

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Discussion Starter · #15 ·
So better to just leave it in the freezer till the next ride?

I often let hang in my spare room closet (with light exposure - closet door is open) in the camelbak hanger after i clean it with a dry paper towel to absorb any possible moisture. Sounds like it might be safer just to leave in the freezer until i use again?
 

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I am not a chemist at all. All I know about science I have picked up from Jeapordy science categories. I may remember some things from High School but there is no way to tell. Anyways, I agree what those other guys said, and thank you all for inspiring me to wash my Camelback. Is biannually enough if I store it in the freezer next to the Jim Beam after every 4th ride? Thanks guys!!:thumbsup:
 

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Lord of the Chainrings
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I clean my Camelbak with a few drops of colloidal silver.

"Colloidal silver works as a catalyst, disabling the enzyme that all one-celled bacteria, fungi and other microorganisms use for their oxygen metabolism. In short, the bad guys suffocate. Colloidal silver is nontoxic, making it safe for children and adults, as well as pets."
 

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Im a chemist too! Not quite finished yet, and I don't think I will stick with it. All the chemists I meet seem to be really poor. Applying to law school after I get my degree

I agree with everyone above. The only thing I would worry about would be the residues left over from manufacturing.
 

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Self Appointed Judge&Jury
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Well I'm not a chemist but I could be studied as a long time subject to exposure to doing this. I have been freezing my Camelbak with a small amount of water in it for nine years. On secant thought after looking in the mirror and trying to form a sentence you may want to cease doing this.;)
 
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