Hi guys,

I read a post the other day from rave420 suggesting the use of polypropylene Ziploc containers instead of glass for freeze precip. He reports that it's much easier to collect the precip since it doesn't adhere to the plastic as strongly as it does the glass. SWIM will definitely be giving this a try as collection of the precip was an issue on his first time around.

Anyway, there was some question about how well polypropylene would hold up to Naphtha. Cole-Parmer has a great online database for relating the compatibility of various materials to various chemicals. Here's the link: http://www.coleparmer.com/techinfo/chemcomp.asp It's the most extensive list I've found.

As it turns out, poly is fine for short term exposure to Naphtha. Can't wait to give this a try!

there's already a thread like this in the Safety subforum, it's the polyethylene transfer pipette thread

Thanks benzyme, didn't see that thread. I can only post in the nursery for now, and should probably venture into the other forums more.

I did want to post the link to their database though, in case it was of any additional value. They relate hundreds of material-chemical combinations at that site, seems like a good resource.

no, my apologies...
I deleted the wrong response, was going to delete my previous reply because
that thread isn't immediately apparent, and the link on that thread doesn't seem to load anyway.

thanks for the good source