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Author: Subject: Where to find rubber septum/Suba Seal stoppers
Db33
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[*] posted on 4-4-2017 at 06:43
Where to find rubber septum/Suba Seal stoppers


https://www.youtube.com/watch?v=ni8fzSLCd1I

in this video he uses something called a Subaseal? its a red rubber thing thathe puts on the neck of a flask and it allows for a needle with a syringe filled with a gas to puncture it and allow the gas in. I looked on ebay for something called a subaseal but couldnt findanything i thought maybe u guys would know a more common name or where to find them.

Edit (zts16): descriptive title for archival purposes

[Edited on 4-6-2017 by zts16]
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CuReUS
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[*] posted on 4-4-2017 at 06:51


its called a rubber septum-https://youtu.be/ViJknvEEEOA?t=94
But I have always had this doubt.Do you even need that.Couldn't you just wrap some saran over the mouth of the flask and then puncture that with a needle ?

[Edited on 4-4-2017 by CuReUS]
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[*] posted on 4-4-2017 at 06:53


I believe it's called a septum.

http://m.ebay.com/itm/5xWhite-Rubber-Septum-Septa-Stoppers-for-24-40-Glassware-Sleeve-free-shipping-/272424224942?hash=item3f6dbfc8ae%3Ag%3ApGgAAOSwIm RYDVPh&_trkparms=pageci%253A1a8e2e7b-1946-11e7-a89c-74dbd180effb%257Cparentrq%253A3972755015b0a2aba628d2e5fffd655b%257Ciid%253A4

I believe this is what your looking for




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[*] posted on 4-4-2017 at 06:56


I have used these before in the past: http://www.ebay.co.uk/itm/Suba-seal-stoppers-9-5mm-pk10-/151... here are some e-bay ones.

Maybe type "Suba Seal" with a space rather than Subaseal - all one word. I used to buy them from Sigma-Aldrich or Lancaster I think.

Note: For ultra high purity, if using these seals with toluene in the test tube, then don't invert the tube... the toluene causes dye to leach out of the rubber into solution. For high purity work I once bought some inert, colourless, silicone stoppers and cut them up and glued them onto the bottom of the suba seals... this gave me a subs seal for my test tube that had a bottom part made of silicone that did not contaminate my reaction.

Hope that helps.




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[*] posted on 4-4-2017 at 06:58


Ha! Simultaneous triple posting!



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[*] posted on 4-4-2017 at 15:32


Quote: Originally posted by DrP  
Ha! Simultaneous triple posting!
No kidding, that was impressive.

I bought some from Deschem a while back, really cheap there: http://www.ebay.com/itm/24-Laboratory-Rubber-Septa-24-40-24-...

They also sell them for 14/x and 19/x joint sizes.




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[*] posted on 5-4-2017 at 10:24


you can get some silicon gasket stuff in a tube if you ever were to require a custom shape of such, claimed to be up to 300*C heat stable



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