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Nitration of phthalic acid
What else is there to do with 3-NO2-PHA? What country are you in? I made some of that about 40 ...
5-12-2019 at 05:16
by: Dr.Bob
Not so secret Santa thing
I'll have to see what the prices are now, I used to ship there often, but then the rates doubled a f ...
4-12-2019 at 13:03
by: Dr.Bob
Not so secret Santa thing
Folks,

I want to thank everyone here as well as try to just be nice to people.

I have a few ...
3-12-2019 at 17:31
by: Dr.Bob
14/20 Reflux (Dimroth) Condensers?
All of those are fine, there are dozens of variations of reflux condensers, I like the 14/20 one sho ...
1-12-2019 at 15:20
by: Dr.Bob
Suggestions of getting a lab heating source
Yes, using an oil bath to transfer the heat. This helps to even out the temperature, and allows a v ...
26-11-2019 at 06:14
by: Dr.Bob
How strict are you about using distilled water vs nondistilled/faucet water in your reactions?
I work in a real lab, and even there we use deionized water where it seems most useful, like reactio ...
21-11-2019 at 18:06
by: Dr.Bob
Science equipment looking for a home
It is getting extremely expensive to ship anything out of the US now, due to stupid postal treaties ...
16-11-2019 at 19:40
by: Dr.Bob
Suggestions for glass joint-grease that won't get stuck after vacuum distillations?
Teflon tape is fine for most cases, but will not hold a high vacuum as it is both slightly gas perme ...
13-11-2019 at 20:00
by: Dr.Bob
Suggestions for glass joint-grease that won't get stuck after vacuum distillations?
They make some very thin Teflon sleeves that work well for vacuum work, but not cheap. I agree tha ...
12-11-2019 at 17:54
by: Dr.Bob
best option for analysing chemicals in home lab
Finding any working Mass Spec for $5000 would be a miracle, but a great deal if so. But without th ...
31-10-2019 at 10:25
by: Dr.Bob
Silica gel for food packaging->silica gel for chromatography?
Not readily. The stuff in food packets is not even close to what you need for chromatography. The ...
31-10-2019 at 10:17
by: Dr.Bob
Science equipment looking for a home
I do have lots of 24/40 distillation kit pieces, not sure if I have enough yet to make a complete ki ...
29-10-2019 at 18:05
by: Dr.Bob
Storage containers
I would avoid PVC for much in the lab, it is not only not resistant to most organics, but it becomes ...
25-10-2019 at 06:38
by: Dr.Bob
Chemical Availability Changes from 15 years ago (US)
I have been thinking about the hobby chemist for a while. 35 years ago, I could walk into a drug s ...
23-10-2019 at 18:53
by: Dr.Bob
Where to get cheap TLC plates?
I have some F254 plates, along with lots of other various ones. I'm happy to provide almost any TLC ...
21-10-2019 at 18:03
by: Dr.Bob
PTFE filters? What are they for?
They are membrane filters, often used to micro filter a solution. They are ideal for removing almos ...
21-10-2019 at 09:14
by: Dr.Bob
Science equipment looking for a home
Here are a few more photos. Some Shlenk line stuff (one piece is broken), some older glassware (mak ...
20-10-2019 at 19:08
by: Dr.Bob
Science equipment looking for a home
Here is another group of photos of more sep funnels I found in 250 and 125 ml sizes. I also still h ...
20-10-2019 at 18:26
by: Dr.Bob
Science equipment looking for a home
Here are some photos of newly found items, from a few more boxes from the bottom of the pile. Ther ...
20-10-2019 at 18:15
by: Dr.Bob
Where to get cheap TLC plates?
I have some TLC plates in 200 x 200 mm format. They are a little old, so I would sell cheap, and ca ...
20-10-2019 at 16:44
by: Dr.Bob
Ideas to run a chromathography column (menthol / camphor)
Just run a column on silica gel (or alumina) and go from hexane to ethyl acetate. Use TLC to decid ...
16-10-2019 at 16:36
by: Dr.Bob
Storage containers
Many containers work well, almost all are better than plastic bags. I like glass, as that tends to ...
12-10-2019 at 05:12
by: Dr.Bob
Max G. Gergel
They were doing much of the large Me Iodide synthesis during World War II, and were short handed, un ...
9-10-2019 at 10:41
by: Dr.Bob
Piecing Together the Ultimate Distillation Set
If you want to do an all glass distillation, I have 3 way distillation adapters with 10/30 glass joi ...
23-9-2019 at 09:12
by: Dr.Bob
Adipic acid and hexamethylenediamine from Nylon 6,6 cable ties
hexametyhylenediamine is very water soluble, and likely quite polar, as a diamine, so less smell tha ...
19-9-2019 at 04:59
by: Dr.Bob
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