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yobbo II
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I think this is an 'Iodine' stopper.
https://www.sciencemadness.org/whisper/files.php?pid=625589&...
How does having a funnel neck allow an airtight seal without grease?
Yob
[Edited on 13-1-2025 by yobbo II]
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drakedevel
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I agree, that stopper does look like one that goes with an iodine flask.
The wet ground glass joint is what provides the airtight seal, just like with grease. The funnel neck provides a convenient way to get the joint
thoroughly wet and supplies a reservoir of excess liquid so evaporation takes longer to compromise the seal.
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SuperOxide
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Quote: Originally posted by Texium  | And this is the $5 Bargain Bin. Every piece in these pictures costs $5, and if you order at least $50 worth of chemicals and/or equipment from me,
I'll throw one of your choice in for free, while supplies last.
B5A 2000 mL Kimax RBF, neck is broken. Flask has some external scratches/etching.
B5B 500 mL Pyrex Florence flask, no ground glass joint, small crack in the top of the neck but still usable.
B5C 600 mL Pyrex Florence flask, top of neck lip is ground glass as if it was designed to fit flush with another piece and be clamped together
B5D 125 mL Pyrex distilling flask, like-new condition
B5E 250 mL Pyrex iodine flask. Takes 24 mm stopper. Sold
B5F 250 mL Bellco Erlenmeyer flask with extra long, wide neck.
B5G 250 mL heavy-walled Pyrex filter flask with broken hose barb
B5H 200 mL Kimax volumetric flask with unusual flared top
B5I 24/40 Kjeldahl bulb with hose barb outlet
B5J Pyrex gravity chromatography column with fritted disc at bottom and glass stopcock. Will provide fitting
stopcock. Sold
B5K Pyrex chromatography column with 125 mL solvent reservoir and glass stopcock. Will provide fitting stopcock. Takes 19
mm stopper, which may be provided if I find more. Sold
B5L 60 mL Pyrex addition funnel with glass stopcock and long stem Sold
B5M ~30 mL addition funnel, angled. Will provide fitting glass stopcock.
B5N Tiny bubbler
B5O 25 mL Dean-Stark trap without ground glass joints. Will provide fitting glass stopcock.
B5P Huge 3-way glass stopcock
B5Q ~1 L Pyrex bottle with 2 24/40 joints
B5R 200 mm Pyrex Vigreux column without ground glass joints.
B5S Large glass tube with 24/40 male joint on one end and 45/50 male joint on other end
B5T Weirdly tall Pyrex 24/40 "h" still head for vertical distillation setup
B5U Pyrex 24/40 odd angled adapter Sold
B5V Unusual Pyrex still head with 2 24/40 male joints and one 19/38 female joint
B5W Kontes 24/40 Y adapter
B5X Pyrex 29/42 tube for cold trap or gas bubbler Sold
B5Y Ace 29/42 tube for cold trap or gas bubbler Sold
B5Z Large Pyrex Dean-Stark trap (?) with male 24/40 joint and female 29/42 joint. Bottom joint is broken but still intact enough to work.
B5AA Strange giant reactor thing. 60/50 center joint, 24/40 and 14/35 side arm joints. Third side arm is broken off.
[Edited on 1-10-2025 by Texium] |
Just curious, what could B5S ("Large glass tube with 24/40 male joint on one end and 45/50 male joint on other end") be used for? Im curious why it
has two male joints instead of two female joints (but maybe im just more used to seeing tubes with female joints on them)
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Texium
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I have no clue, and that is why it is in the bargain bin 
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SuperOxide
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Btw, I received my order of some 45/50 condensers and reagents from Texium last week - Excellent quality and price. Very happy with my purchase
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Texium
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Registered: 11-1-2014
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I posted updated spreadsheets yesterday which reflect the flurry of sales I've had the last month. However, I've decided that after finishing up the
orders that I'm currently working on, I'm going to put a pause on further orders for the next few months. I'm preparing for my dissertation defense,
and I need to limit other obligations and distractions as much as possible until I'm past that. I will likely resume sales this summer though, so feel
free to still send me a U2U if there are items you would like to put on reserve. I just won't fulfill the order until summer.
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