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PTFE filters? What are they for?
I was just about to write that! Yes, pre-wetting PTFE membrane filters with organic solvent before t ...
23-10-2019 at 14:49
by: DavidJR
Where to get cheap TLC plates?
It is significantly cheaper to buy large plates and cut them up into smaller sizes as required. That ...
19-10-2019 at 11:08
by: DavidJR
Should 99.99% mercury contain slag? [Update from seller]
If it's just that small amount of insoluble crud then that could quite easily still meet the 99.99% ...
18-10-2019 at 16:18
by: DavidJR
Ether for Grignard
THF is a lot safer than diethyl ether if you can get it.

Minimum amount you can get away with dep ...
8-10-2019 at 03:08
by: DavidJR
Boric oxide/Carbon at 1000C to Diborane?
It'd probably be easier to make NaBH4 from scratch then use that to make diborane...
30-9-2019 at 07:28
by: DavidJR
"Horworka" distillation link
Ooooh, that looks pretty neat... Where can I get one?
29-9-2019 at 15:15
by: DavidJR
Nilered obviously don't know how to minimise the amount of Cr waste
He also didn't fully reduce all of the hexavalent chromium. Look at that yellow crust...
29-9-2019 at 03:02
by: DavidJR
remove ion pairing reagent after pre-HPLC my products
There are volatile ion paring reagents though, mainly perfluorinated straight chain carboxylic acids ...
24-9-2019 at 06:44
by: DavidJR
remove ion pairing reagent after pre-HPLC my products
Oh I know, but it’s true, isn’t it?
23-9-2019 at 14:36
by: DavidJR
remove ion pairing reagent after pre-HPLC my products
Best approach would be to come up with a HPLC method that doesn’t require any nonvolatile additive ...
23-9-2019 at 11:05
by: DavidJR
Forum has been moved to manual registrations only
What's happening with the move to more modern forum software?
21-9-2019 at 06:28
by: DavidJR
grignard reagent to o-Chlorophenyl cyclopentyl ketone
I don't think you mean triturated....
19-9-2019 at 14:50
by: DavidJR
Synthesize ethylene glycol diacetate?
[rquote=623005&tid=153970&author=Junk_Enginerd]
So I gather that we're eliminating any and ...
16-9-2019 at 10:59
by: DavidJR
Peptide Synthesis Survey
I don't think many people here do any peptide synthesis. I've done some reading on SPPS but it's not ...
16-9-2019 at 09:56
by: DavidJR
Synthesize ethylene glycol diacetate?
24% acetic acid is definitely not going to cut it for an esterification. You need to eliminate water ...
16-9-2019 at 09:51
by: DavidJR
HVZ bromination with S instead of P?
No idea but I bet if you use sulphur it will absolutely stink...
16-9-2019 at 09:48
by: DavidJR
Feasibility of preparing copper phthalocyanine at home
[rquote=622579&tid=153743&author=Arcaeca]Okay, I'm not sure if the phthalic anhydride can be ...
10-9-2019 at 05:30
by: DavidJR
Preparation of Diethyl Sulfate
[rquote=622539&tid=78772&author=Magpie]I also could never get a yield near that of L&S. ...
9-9-2019 at 12:33
by: DavidJR
Preparation of Diethyl Sulfate
I tried this today, following the Lynn and Shoemaker procedure as precisely as I could. Unfortunatel ...
8-9-2019 at 14:17
by: DavidJR
Discord
There is, but it is not very active. Invite: https://discord.gg/Z6Kj7Zx

There are some more activ ...
7-9-2019 at 13:00
by: DavidJR
Feasibility of preparing copper phthalocyanine at home
[rquote=622389&tid=153743&author=unionised]Just a thought; do you need to convert the phthal ...
7-9-2019 at 12:52
by: DavidJR
Feasibility of preparing copper phthalocyanine at home
Yeah apparently the microwave synth works quite well but I would not recommend doing it in a microwa ...
7-9-2019 at 08:27
by: DavidJR
Feasibility of preparing copper phthalocyanine at home
[rquote=622372&tid=153743&author=unionised]Copper phthalocyanine was originally prepared by ...
7-9-2019 at 04:42
by: DavidJR
Feasibility of preparing copper phthalocyanine at home
Yes, it is feasible to make at home, I've done it. It's also not an especially difficult synthesis. ...
7-9-2019 at 04:05
by: DavidJR
failiure at nitration, can I recover anything?
[rquote=622315&tid=153360&author=jupiteri35]
Can it really pass the skin?[/rquote]

Yes i ...
6-9-2019 at 13:48
by: DavidJR
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