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melting point apparatus
Yes, just make sure that they are sealed at one end. I have seen many people sell open ended capil ...
17-1-2019 at 17:04
by: Dr.Bob
No lagging on dean-stark apparatus?
Insulating the Dean Stark helps it work much better. A vacuum jacketed one is ideal, but just wrap ...
16-1-2019 at 06:26
by: Dr.Bob
Pump oil for Rotary Vane - What grade?
Welch and Fisher sell general purpose rotary vac pump oil, but you can also find it at some auto par ...
14-1-2019 at 07:45
by: Dr.Bob
Nicotinamide dehydration
A simple google search brought up a few ways:

https://www.researchgate.net/profile/Sangeeta_Jha/p ...
7-1-2019 at 10:17
by: Dr.Bob
How to scrub ethyl acetate vapors before releasing into the outside air? Hundreds of neighbors are complaining.
Not sure where you are, but in my state doing anything that releases any "appreciable" solvent or ch ...
29-12-2018 at 08:59
by: Dr.Bob
Science equipment looking for a home
Home everyone had a Merry Christmas and a Happy New Year. And thank you to everyone who got glassw ...
29-12-2018 at 08:50
by: Dr.Bob
n-butyllithium
A good rubber septa would be fine, I would just secure it with some wire, so it cannot pop off or le ...
29-12-2018 at 07:54
by: Dr.Bob
Borosilicate under pressure?
For 250 ml, a glass vessel is really pushing it, even for the Ace or Aldrich pressure tubes, and if ...
27-12-2018 at 10:05
by: Dr.Bob
Free fume hoods in NC
"Two Clean Hoods work perfectly to keep work area clean. Mainly used for electronics and scientific ...
25-12-2018 at 13:15
by: Dr.Bob
Science equipment looking for a home
We have a winner. I'll do some more books soon, thanks and Merry Christmas.
25-12-2018 at 12:44
by: Dr.Bob
Science equipment looking for a home
Merry Christmas to all you science geeks out there!

In the spirit of Christmas, I have a used ...
25-12-2018 at 12:00
by: Dr.Bob
DIY Vacuum Filtration
Most basic glassware can handle a vacuum, although flat bottom flasks are much less suitable than ro ...
25-12-2018 at 11:50
by: Dr.Bob
Buying bromine from china
No reputable company will ship a kilo of bromine from China without a huge hazmat charge. If they s ...
24-12-2018 at 20:04
by: Dr.Bob
Alright looking for insight
In simple benzene, I do think of the carbons as all equivalent, and the electrons as a donut on both ...
24-12-2018 at 19:43
by: Dr.Bob
Looking For: Fluoropolymer Tubing
I have a few pieces of it as well, but I don't have a lot of specs for it. But if you want to try ...
20-12-2018 at 18:30
by: Dr.Bob
Reported posts in my outbox
Why does it not work to just select the messages I don't want and just hit "delete" at the bottom. ...
18-12-2018 at 19:33
by: Dr.Bob
Reported posts in my outbox
I just saw the same thing, but the challenge is that I cannot seem to delete them in bulk, if I sele ...
18-12-2018 at 07:28
by: Dr.Bob
Science equipment looking for a home
My u2u is locked up and it won;t let me delete messages right now, so I'll post this here.

The ...
18-12-2018 at 07:16
by: Dr.Bob
Science equipment looking for a home
I have a few things in that list. I took photos a while back but have not yet posted them, as the ...
16-12-2018 at 19:56
by: Dr.Bob
Lot of Chemglass flasks - anyone interested in any of these?
The jacketted flasks are meant to be used with a water bath/chiller unit (or steam if heating). The ...
16-12-2018 at 19:17
by: Dr.Bob
Lot of Chemglass flasks - anyone interested in any of these?
If anyone needs stopcocks, I have a dozen or more spare ones from broken glassware in most sizes (#1 ...
13-12-2018 at 13:39
by: Dr.Bob
Polycone cap chemical compatibility
Plastic like HDPE is not ideal for harsh organics. And cheap plastic caps and liners are a pain, A ...
9-12-2018 at 20:08
by: Dr.Bob
Cleaning Glas Cols?
I would guess that you need a better stir bar, I use a Corning hotplate often and can stir well righ ...
7-12-2018 at 18:28
by: Dr.Bob
Cleaning Glas Cols?
Don't overheat them to clean, it will make them worse. The key thing is to regulate the power to ...
2-12-2018 at 16:07
by: Dr.Bob
Tosyl sulfonhydroxamic acid
Hydroylamine is pretty safe when in solution, the key is to extract any excess hydroxylamine materia ...
2-12-2018 at 16:05
by: Dr.Bob
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