Chem storage in polycarbonate?

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Stephan Goldstein - 03 Nov 2004 12:24 GMT

These are a popular item at the local outdoors store in 1-qt. size.
Polycarbonate has the advantage of being unbreakable. Since I
keep my chems in a closet I don't need amber coloration. Does
anyone have a feel for the effectiveness of this material at keeping
out the O2? How about the lids, they're probably something else
like HDPE or LDPE?

I know about soda bottles (PET) but am reluctant to use them
because my 4-year-old nephew is at that stage where he believes
anything in a soda bottle must be soda...

Thanks.

Steve

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David Nebenzahl - 03 Nov 2004 18:18 GMT

On 11/3/2004 3:24 AM Stephan Goldstein spake thus:

> These are a popular item at the local outdoors store in 1-qt. size.
> Polycarbonate has the advantage of being unbreakable. Since I
[quoted text clipped - 6 lines]
> because my 4-year-old nephew is at that stage where he believes
> anything in a soda bottle must be soda...

There was a discussion of this (storage qualities of various materials) here
in the not too distant past, and the data showed that the best materials in
descending order are glass[1], PET and then polyethylene (HDPE/LDPE). I think
polycarbonate was there somewhere with PET--that is, better than PE, which is
not very good as it's not very impervious to O2.

Someone should post this stuff again. (Can't find it myself just at the moment.)

[1] Of course, just as important as the bottle material is the stopper.
Chemicals stored in glass with a lousy stopper fare no better than those
stored in PE.

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Dan Quinn - 08 Nov 2004 23:14 GMT

> There was a discussion of this (storage qualities of various
> materials) here in the not too distant past, ...
>
> Someone should post this stuff again. (Can't find it myself
> just at the moment.)

Did you search this NG for, canning lids ? Do so. Dan

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Dan Quinn - 04 Nov 2004 11:00 GMT

RE: sg0ldo1867@yahoo.com (Stephan Goldstein)

Go bottle shopping at www.tri-esssciences.com . Also look
for their nice selection of caps.
Save for a few special types of bottle I use the Polyseal
cone insert caps. I think they must supply the best possible
seal. My Boston Rounds use those caps. Tri-Ess has those rounds
in amber and clear. I think there is a Polyseal to fit any size
Boston Round. You'll save money buying them. I know how much
Outdoor gear costs. And don't worry they are GLASS.
They've a lot of other gear plus some chemistry. Dan

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