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Science equipment looking for a home
I finally got Glas Col to answer the phone and they said that this is an older plug that has not bee ...
27-2-2020 at 15:50
by: Dr.Bob
Legality of Solid Fuels
In the US you are limited to buying only 1 pound per year of chlorates and perchlorates for personal ...
27-2-2020 at 11:24
by: Dr.Bob
Looking to trade for or purchase Hung’s base (DIPEA)
Where are you located? That makes a huge difference.
27-2-2020 at 10:38
by: Dr.Bob
Science equipment looking for a home
I wanted to update people on a few areas of glassware. I get a lot of inquiries, and try to answer ...
25-2-2020 at 18:55
by: Dr.Bob
Yes, I am cursed.
That looks very fixable, as long as they have a > 2.5 M annealing oven. Good luck. I once shi ...
23-2-2020 at 18:51
by: Dr.Bob
Cubane; Dimethyl Cubane-1,4-dicarboxylate synthesis
That looks pretty interesting. I have never seen this synthesis, but it looks good, practically a ...
15-2-2020 at 17:33
by: Dr.Bob
looking for biochemistry experiments i can do at home. need to spark a passion
Fermentation and brewing come to mind.
11-2-2020 at 17:25
by: Dr.Bob
Does anyone know if these are borosilicate or not?
How hard is it to buy a beaker? Most people I know pay a lot for coffee pots.
11-2-2020 at 17:23
by: Dr.Bob
Reactions of chlorosulfonic acid
I have used it to use for making aryl sulfonyl chlorides. Still remember the time someone tried to ...
11-2-2020 at 17:09
by: Dr.Bob
Bromo-DDT, p,p-dibromo-diphenyl-1,1,1-trichloro-ethane
I found a 1 lb bottle of DDT from ~1960 when cleaning my parents house out. I'll save it for emerg ...
10-2-2020 at 20:07
by: Dr.Bob
Is it cheaper to buy or make hot plate magnetic stirrers?
I would strongly recommend buying a used quality hotplate/stirrer, not sure about Europe, but in the ...
10-2-2020 at 19:29
by: Dr.Bob
Science equipment looking for a home
Has anyone ever seen a larger two pin connector for a Glas-Col heating mantle before? I have one m ...
31-1-2020 at 10:40
by: Dr.Bob
"Firewire" E-Initiator
MJG makes the Firewires, they are very similar in use to MJGs normal e-match, but use a mix that avo ...
30-1-2020 at 12:02
by: Dr.Bob
chemiluminiscence
You might be able to use a dry to increase the light output, as singlet oxygen can react with some d ...
30-1-2020 at 10:53
by: Dr.Bob
Methods for preventing over addition of Grignard reagent
They are very water and CO2 sensitive, and some could react with oxygen (I think) as well. But CO2 ...
30-1-2020 at 09:39
by: Dr.Bob
H2SO4 distillation with rubber gasket?
I worked with boiling surfuric acid years ago, when it was used to clean silicon wafers before they ...
29-1-2020 at 14:24
by: Dr.Bob
Graham condenser - explosion hazarded?
If you prefer an Allihn condenser for the Soxhlet, I have some extra conensers that fit most every s ...
29-1-2020 at 14:17
by: Dr.Bob
Venturi Water Aspirator - Bad design? Not achieving a good vacuum
For most aspirators to provide a good vacuum, you need a water pressure from 60-100 psi at a flow ra ...
14-1-2020 at 14:24
by: Dr.Bob
Emulsions from MgSO4?
Just take some and mix with a simple solvent like hexane, stir, decant the emulsion off, then dry th ...
12-1-2020 at 20:04
by: Dr.Bob
Emulsions from MgSO4?
It may just have fines in the mix, MgSO4 is the fluffiest drying agent, so it could do that. If yo ...
12-1-2020 at 14:38
by: Dr.Bob
Removing charcoal from evaporating dish
A little KOH in EtOH will generally clean most things off of glass or just etch off enough glass to ...
7-1-2020 at 13:53
by: Dr.Bob
Science equipment looking for a home
[rquote=629032&tid=15667&author=Doc B]Any chance you have any of the following?

A short ...
5-1-2020 at 13:47
by: Dr.Bob
Recycling bromide from Grignard reactions
I doubt that you can collect the salts in any useful manner, KBr is dirt cheap compared to most of ...
27-12-2019 at 14:31
by: Dr.Bob
Not so secret Santa thing
I hope you all can find uses for many of the odd bits and pieces I threw in with the bottles, vials, ...
18-12-2019 at 10:43
by: Dr.Bob
Not so secret Santa thing
Wow, that was fast. Glad to hear it made it there so quick. Hopefully everything is intact in it.
16-12-2019 at 18:55
by: Dr.Bob
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