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Hydrogen
Transfer hydrogenation used sodium formate quite often, which reacts with Pd/C to generate H2 and CO ...
24-9-2018 at 07:27
by: Dr.Bob
How to deal with oil mist on vacuum pumps?
They make mist catching filters that go on the exhaust. They slow down the roughing, but don't real ...
20-9-2018 at 17:48
by: Dr.Bob
Best locking mechanism for glass Flash Chromatography? Keck clips don't work.
I've rarely had a keck clip pop off, so I agree that you may be using too high a pressure. I always ...
20-9-2018 at 17:45
by: Dr.Bob
Expensive bottle cap's and their resistant liners
If anyone is looking for smaller bottles, I found two more cases of 60 ml Boston rounds from Qorpak, ...
19-9-2018 at 17:06
by: Dr.Bob
Flame heating (larger) RBFs?
And remember, the thicker the flask, the less evenly it will heat and expand, so thin glass is bette ...
19-9-2018 at 06:18
by: Dr.Bob
Ethyl bromide synthesis not working
Using truly anhydrous ethanol will improve the yield as well. If you have 3-4 equivalents of etha ...
17-9-2018 at 15:44
by: Dr.Bob
Expensive bottle cap's and their resistant liners
There are already PTFE cap liners for sale by some company, I have seen bags of them over time. Mi ...
15-9-2018 at 11:05
by: Dr.Bob
Preparation of magnesium silicate and/or activated alumina (and others) for chromatograpy
The cost comes down to what quality you want. Flash silica gel is made to tight (and very fine) pa ...
14-9-2018 at 11:22
by: Dr.Bob
Wondering where to buy such Breakseal ampule
I have some 1 ml weaton ampules for flame sealing. I can sell small numbers of them, they are che ...
11-9-2018 at 09:36
by: Dr.Bob
Looking for cheap bottles, 250, 500, 1000ml. Any recommendations?
It is very hard to find cheap PTFE lined caps by themselves. Often, the cost from Qorpak for the c ...
10-9-2018 at 08:45
by: Dr.Bob
Looking for cheap bottles, 250, 500, 1000ml. Any recommendations?
I have seen occasional low prices on Amazon and Ebay, often when they are changing products out, mov ...
9-9-2018 at 16:50
by: Dr.Bob
Please recommend some decent hotplates
Just found a box with a couple of working PC-320 Corning stirring hotplates while looking for some o ...
9-9-2018 at 16:40
by: Dr.Bob
Please recommend some decent hotplates
[rquote=534083&tid=90184&author=Keftedes89]I have seen may hotplates stirrers out there as I ...
8-9-2018 at 17:09
by: Dr.Bob
Looking for cheap bottles, 250, 500, 1000ml. Any recommendations?
I do occasionally find used bottle worth cleaning and reusing, but getting harder, as most vendors n ...
8-9-2018 at 05:51
by: Dr.Bob
Reduction tube, vented boiling tube
If you want to heat it with a flame or to ridiculous temperatures, quartz is the way to go, the pres ...
8-9-2018 at 05:35
by: Dr.Bob
Reduction tube, vented boiling tube
I have many Ace and Chemglass heavy walled tubes for high pressure reactions, from 10 ml to 250 ml. ...
7-9-2018 at 11:17
by: Dr.Bob
Looking for cheap bottles, 250, 500, 1000ml. Any recommendations?
I have lots of 60 and 120 ml bottles (in several types, caps, shapes, etc, for $1-3 each, most with ...
7-9-2018 at 10:11
by: Dr.Bob
Filter flasks and Buchner
I find 125 ml filter flasks to be ideal for small Buchners, like 55 mm and 70 mm.

The 250 ml filt ...
3-9-2018 at 17:54
by: Dr.Bob
Conversion of Acetone to a Gasoline Alternative
The challenge is that very few chemicals are cheaper per gallon than gasoline, due to the scale of i ...
28-8-2018 at 18:33
by: Dr.Bob
Any place to get granular purified silicone dioxide for chemistry applications?
You can get cleaned sand, which is what many labs use for filtrations. Celite also works fine as w ...
27-8-2018 at 17:17
by: Dr.Bob
Order a chemical, get something else
I have had mostly good luck with both big and small companies, but have had a few big companies ship ...
26-8-2018 at 17:56
by: Dr.Bob
33-430 caps
Are you looking for media bottle caps for 100 to 2000 ml bottles? I have some available in small n ...
20-8-2018 at 18:23
by: Dr.Bob
Water desalination in deep sea water - using pressure of the deep - possible?
The force required to hold an empty pipe in the ocean at any depth would be enormous, due to the buo ...
17-8-2018 at 10:53
by: Dr.Bob
Rain-X water repellent & properties of glass - is it a coating or just cleaning effect?
Rain x works by chemically bonding an octyl group to the Silicons in the glass, via

Triethoxyoct ...
17-8-2018 at 10:40
by: Dr.Bob
thoughts on laboratory lattice
I still have some used 1/2" Al lattice rod and connectors. I have sold most for 1/2 to 1/4 than th ...
13-8-2018 at 09:36
by: Dr.Bob
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