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Science equipment looking for a home
someone asked me about a sublimation apparatus a little while ago, can't rememeb who, but it is was ...
23-5-2022 at 17:58
by: Dr.Bob
Science equipment looking for a home
A is gone, and B is pending.

Still have lots of 29/42 glassware if anyone is interested. Lot ...
23-5-2022 at 09:36
by: Dr.Bob
Science equipment looking for a home
I have a bunch of odd round bottom flasks left that I would like to sell cheap. if you have any int ...
19-5-2022 at 16:23
by: Dr.Bob
Open science journals, publication as a private individual
Congrats, I am impressed even though I barely understood the method or most of the words used. And ...
16-5-2022 at 16:38
by: Dr.Bob
Looking for Heidolph rotovap G6 glass set adapter
I think that I have some of these without the vapor/steam tube, just have to dig them out, might be ...
14-5-2022 at 02:56
by: Dr.Bob
Looking for Heidolph rotovap G6 glass set adapter

The length of the steam duct is 120 mm from the inside joint, and it sticks out 87 mm past the end ...
13-5-2022 at 17:17
by: Dr.Bob
2,5-diketopiperazine
That is a a great job, considering how hard that type of chemistry can be tough to do without fancy ...
13-5-2022 at 16:56
by: Dr.Bob
Looking for Heidolph rotovap G6 glass set adapter
The joint is 45/50, which is pretty standard, the round part is the Standard Buchi flange, which is ...
13-5-2022 at 07:35
by: Dr.Bob
Looking for Heidolph rotovap G6 glass set adapter
Here is one I just found, it has the steam duct built in, but not sure if that would work, I think I ...
12-5-2022 at 18:23
by: Dr.Bob
Looking for Heidolph rotovap G6 glass set adapter
I likely have a Buchi part like that, I think they use all of the same joints, S35 on the bottom, an ...
11-5-2022 at 06:41
by: Dr.Bob
Removing superglue from table
If you soften it with acetone, it will scrap off easily with a razor knife.
9-5-2022 at 16:10
by: Dr.Bob
Separation of toluene and isobutanol
I would do some test distillations first and then collect fractions for every 10% of the volume or e ...
9-5-2022 at 11:16
by: Dr.Bob
LAH Reduction
You can do LAH reactions on a large scale, but must be very careful, patient, and use sense. I hav ...
7-5-2022 at 10:01
by: Dr.Bob
anyone have experience forming grignards from chlorobenzene
I believe that using an alkyl grignard will react with the aromatic halide and create alkane (which ...
7-5-2022 at 09:55
by: Dr.Bob
Catalyst for Amide hydrolysis
Using NaOH to cleave amides can work rather than 6N HCl, which is a common method, but requires heat ...
2-5-2022 at 11:02
by: Dr.Bob
ethyl acetate
MgSO4 can also be used to dry ethanol, so drying it and the acetic acid might help the yield. You ...
2-5-2022 at 11:00
by: Dr.Bob
LAH Reduction
You only want the nitrogen at about 1 psi or less over 1 atmosphere, so that it barely pressurizes t ...
26-4-2022 at 17:54
by: Dr.Bob
My info
This is a tough time for any small business. Not to make light of Mr. Sizer's business, but the la ...
25-4-2022 at 07:40
by: Dr.Bob
DCM
If anyone near NC wants some, I might be able to provided some material to recycle from a DCM/methan ...
18-4-2022 at 10:02
by: Dr.Bob
DCM shortages
No problem getting DCm so far, but liquid helium is getting harder to find, and will only get worse ...
13-4-2022 at 15:24
by: Dr.Bob
How to tell borosilicate from non-borosilicate glass
I have seen borosilicate with clear, green, blue green and other tints, as stated, it is the iron co ...
10-4-2022 at 17:35
by: Dr.Bob
Value of gold
I may be one of the few chemists to ever use a gold catalyst for real chemistry. It was not a grea ...
29-3-2022 at 17:27
by: Dr.Bob
Getting Celite 545 out of a medium frit?
I like the filter paper before the celite idea, but if you wash it enough, it will likely eventually ...
29-3-2022 at 17:14
by: Dr.Bob
Sodium hydrosulfite source ?
Where are you located?
29-3-2022 at 17:00
by: Dr.Bob
How do the PTFE "Chem-Vac Stirrer Bearings" work?
Also, if you are in the US, I have PTFE paddles for the normal glass stir shafts in many sizes. I ...
22-3-2022 at 13:35
by: Dr.Bob
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