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eBay 14/20 glassware priced to sell (US)
Interesting mix of stuff. I likely have about 60-80% of the same stuff, but cannot list it that fa ...
14-1-2018 at 15:25
by: Dr.Bob
latest glassware purchase
I have a few various jacketed beakers and fritted funnels/reactors if people want any. I think the ...
12-1-2018 at 20:14
by: Dr.Bob
Separatory Funnel O-Rings
Great find Nemo, I paid a lot for a box of them years ago. But I always run out of the smaller one ...
12-1-2018 at 20:06
by: Dr.Bob
Carbamate Synthesis
Not positive what causes the gas evolution, certainly any water in the alcohol will hydrolyze the is ...
12-1-2018 at 20:02
by: Dr.Bob
Science equipment looking for a home
Also, while looking for stuff for people I have found the following boxes of items, many of which I ...
12-1-2018 at 19:45
by: Dr.Bob
Science equipment looking for a home
I'll try to consolidate my heating mantles soon, I don;t have many left, but there are a few left sc ...
12-1-2018 at 19:30
by: Dr.Bob
Boron- Skylighter
Bert,

Thanks for posting that, Skylighter is legendary in the fireworks world, and a great sourc ...
12-1-2018 at 05:24
by: Dr.Bob
Unfreezing glass joints?
I have had luck on some joints with a sonicator. If you fill the entire flask or item and sonicate ...
10-1-2018 at 12:04
by: Dr.Bob
Science equipment looking for a home
I do have some scraps of glass tubing scattered round, and there are some about 20 mm in diam, so le ...
10-1-2018 at 05:21
by: Dr.Bob
Heating Mantle Controllers
Bump. I'm trying to keep this visible, as people have posted a number of questions regarding heati ...
8-1-2018 at 08:33
by: Dr.Bob
Substitute for piperidine in this reaction
Morpholine may also work as a replacement for piperidine. It can form enamines with aldehydes, whic ...
6-1-2018 at 06:21
by: Dr.Bob
the right choice of PTC catalyst
A company years ago made thousands of combinations of the alkyl groups to find disinfectants, from t ...
3-1-2018 at 10:39
by: Dr.Bob
Thermometers
I've seen a lot of therms, but never anything quite like those. They appear designed to hang into ...
2-1-2018 at 19:29
by: Dr.Bob
Micro scale glassware, where can I buy?
I do have some small stuff left, not a huge amount, but some things, especially V-bottom Weaton vial ...
2-1-2018 at 10:48
by: Dr.Bob
Thermometers
If they are really nice ones, I would save most and try to resell them, limited range ones cost a fo ...
2-1-2018 at 10:46
by: Dr.Bob
GL45 caps/lids for media bottles - why so expensive & where to get?
I have some decent quality white media bottle caps, which are lined with some Teflon type material. ...
2-1-2018 at 10:42
by: Dr.Bob
Making a micro-buchner vacuum filtration wand.
I might have some small tubes with frits on the end if you are interested. They are not as small a ...
29-12-2017 at 17:02
by: Dr.Bob
250ml RBF with a bubble in the bottom?
I think the spot you are seeing is likely from the flash or other light source. I also agree that ...
28-12-2017 at 06:46
by: Dr.Bob
So I bought an (Agilent) HP 5890 gas chromatograph...
That is a great GC, used them years ago, and we still use them where I work now.

They are about a ...
26-12-2017 at 18:42
by: Dr.Bob
858D Hot Air Gun
I doubt the item shown can provide near as much heat as a torch or mantle can in a useful fashion. ...
23-12-2017 at 06:06
by: Dr.Bob
Unkown product, Glacial Acetic acid distillation
The reaction would clearly be in equilibrium, and shifted away from the direction I pointed, but the ...
23-12-2017 at 05:59
by: Dr.Bob
Unkown product, Glacial Acetic acid distillation
You might be making Mg(OAc)2 and H2SO4 from the reaction of MgSO4 and HOAc. The H2So4 would then re ...
22-12-2017 at 05:13
by: Dr.Bob
Volumetric glassware, proper use and calibration by water weight.
I wish all same sized glassware weighed the same as well, but not only can manufacturers not easily ...
9-12-2017 at 06:48
by: Dr.Bob
Volumetric glassware, proper use and calibration by water weight.
I sometimes use volumetric flasks at work, and have also seen some errors in the volume, based on we ...
8-12-2017 at 19:53
by: Dr.Bob
Reduce cinnamaldehyde to hydrocinnamaldehyde
A simple hydrogenation is the best way to reduce a double bond in the presence of a carbonyl. Few ...
30-11-2017 at 12:13
by: Dr.Bob
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