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Wide Mouth Valve to attach to Ground Glass Joints?
A powder addition funnel will be much easier, and most are already pressure equalized, so they work. ...
13-5-2021 at 17:27
by: Dr.Bob
Synthesis of Hexahydrocannabinol
None of the products are going to convert into CBD or THC easily, and the starting materials are not ...
13-5-2021 at 05:10
by: Dr.Bob
Radiophobia?
I remember playing with liquid mercury at school, and even having a science demo where the person fr ...
13-5-2021 at 04:58
by: Dr.Bob
Perfluorpolyeter
There are electrochemical ways to swap F for H, but they are not trivial, mostly done on industrial ...
11-5-2021 at 13:01
by: Dr.Bob
Perfluorpolyeter
That makes sense, likely made from hexafluoropropene (a cheap byproduct of Teflon production), which ...
10-5-2021 at 10:30
by: Dr.Bob
Buchi Rotovap for sale - $650
That's a great price, you can't even buy a broken one or parts for that on Ebay. Shipping could a ...
6-5-2021 at 04:26
by: Dr.Bob
Tubing for condenser hookup?
I have used everything from thin rubber tubing (not ideal, as it can pop off or get aneurysms), to T ...
4-5-2021 at 05:04
by: Dr.Bob
What Fritted Disk Pore Size to Select for Filtrations?
Most frits I have seen are marked in Cource, Medium, or Fine. Fine is great for trying to remove ...
3-5-2021 at 10:40
by: Dr.Bob
pilot scale glassware for sale [from GERMANY]
The main vacuum seal on the Buchi rotovaps shown (R111 or R114) are a KD-22 part (at least in the US ...
30-4-2021 at 07:02
by: Dr.Bob
pilot scale glassware for sale [from GERMANY]
If you have any KD-22 rotovap seals in the pile of stuff, I would be interested in some. In the US ...
29-4-2021 at 17:50
by: Dr.Bob
Question about storage of recycled solvents
I often reuse colvent from simple things, sometimes I reuse the original container, but always mark ...
12-4-2021 at 17:19
by: Dr.Bob
Heidolph Rotovap
I have mostly used Buchi's so I may be just very used to them or biased, but I did use a Heidolph fo ...
11-4-2021 at 14:58
by: Dr.Bob
KClO4 separation from KClO3 ?
You'll find more expertise on this in the energetics part of the forum. They do this stuff a lot. ...
5-4-2021 at 16:25
by: Dr.Bob
My Chloral Hydrate Synth
Very nice experimental. I have smelled choral before and does have an oddly nice smell. I need ...
5-4-2021 at 16:22
by: Dr.Bob
Filter madness
Somewhere in my pile I still have a box of huge sheets of filter paper in rectangles, I think about ...
4-4-2021 at 13:20
by: Dr.Bob
Where to get those flexible heating mantles?
What size mantle are you looking for?

You will need either a variac or a power controller to u ...
2-4-2021 at 07:09
by: Dr.Bob
24/40, 24/29, 29/32, what is the best?
It also depends on where you are. If in the US, 24/40 is the most common, although I have lots of ...
28-3-2021 at 17:11
by: Dr.Bob
Peroxide Concerns - Please Help
You can always wash the ether product solution with aqueous thiosulfite or sulfite solution to help ...
25-3-2021 at 18:47
by: Dr.Bob
What on earth.....
Looks similar to a glass ampule sealer as well, most have a carousel for ampules, and then spin the ...
25-3-2021 at 06:23
by: Dr.Bob
Nitric oxide/antiviral nose spray for COVID-19
Maybe fuming nitric acid? I am pretty sure it will kill covid.
22-3-2021 at 11:42
by: Dr.Bob
Removing mercury from mercury vapor lights
Most are not,as you don't want the UV to escape, only the visible light. But if it is a UV lamp, it ...
22-3-2021 at 11:37
by: Dr.Bob
perfluoro sulphonic acid synthesis?
You can buy hexafluoropropene by the cylinder full. I think it is a by-product of PTFA production. ...
22-3-2021 at 11:31
by: Dr.Bob
How to balance tall glassware
I still have some lattice work pieces of 1/2" rod and clamps if you are in the US. A 3 x 4 foot la ...
21-3-2021 at 18:34
by: Dr.Bob
Method for demethylation of secondary amineļ¼Ÿ
Do those methods work for secondary amines OK? I know ACE-chloride (alphachloroethyl chloroformat ...
20-3-2021 at 17:41
by: Dr.Bob
perfluoro sulphonic acid synthesis?
Are you looking for grams or pounds of it? You can get lower MW ones still, like perfluorobutyl wh ...
20-3-2021 at 17:29
by: Dr.Bob
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