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Synthesis of quinizarin
Nice, nice colour.
I don’t have phthalic anhydride (expensive!), but that’s a nice reaction I'd ...
2-4-2024 at 09:31
by: Keras
Chemiolis's YouTube channel
[rquote=691984&tid=160249&author=dettoo456]He probably just has accounts with Sigma, Thermo, ...
28-3-2024 at 01:33
by: Keras
Chemiolis's YouTube channel
Folks,

Any opinion on this channel? The guy seems to be pretty competent, but he sometimes works ...
26-3-2024 at 01:34
by: Keras
Stainless Steel Reaction Vessels
[rquote=691803&tid=160144&author=zed]Umm. Decarboxylation of Sodium Benzoate? Guys often ...
21-3-2024 at 04:50
by: Keras
Oxide layer on Copper
I thought the alteration of copper in air was mainly due to the formation of copper carbonate? A bit ...
16-3-2024 at 00:24
by: Keras
Stainless Steel Reaction Vessels
I was looking at some point to some sort of stainless steel round bottom flask to perform the therma ...
15-3-2024 at 23:55
by: Keras
Oleophobic coatings composition
[rquote=691488&tid=160212&author=bnull]Not exactly synthesise but you can mix your own.

T ...
11-3-2024 at 06:57
by: Keras
Suggestions on vacuum pump purchase
I have a water aspirator, but while this is OK for, eg, vacuum distillation, it is an overkill for v ...
11-3-2024 at 02:39
by: Keras
Oleophobic coatings composition
Hey,

does anyone really know what's inside the oleophobic coatings used to ‘temper’ smartphon ...
11-3-2024 at 00:50
by: Keras
How hazardous is fluorine chemistry?
I have a 1L bottle of 60% HF on my shelves. Never opened it. I have a tube of calcium gluconate gel ...
18-2-2024 at 04:15
by: Keras
Acetic anhydride preparation
[rquote=690777&tid=9&author=clearly_not_atara]I just don't think it's considered interesting ...
9-2-2024 at 10:17
by: Keras
Sodium Nitrite in the news today
As usual, this is — as EF2000 says – putting lipstick on a pig. If people don’t have access to ...
18-12-2023 at 00:41
by: Keras
UK: Hydrochloric acid, phosphoric acid, and hexamine now restricted/banned!
Really, I think the best way to ‘concentrate’ phosphoric acid is to add phosphorus oxide to it u ...
16-12-2023 at 01:42
by: Keras
Speed of C programs, relative to Java
I’m going to have a look! Thanks for that! And yeah, 128-bit IEEE is handled by software, so I gue ...
14-12-2023 at 01:46
by: Keras
Speed of C programs, relative to Java
BTW, you don’t have access to 128-bit IEEE754 floats? Long double type?

About the Wilkinson po ...
13-12-2023 at 09:27
by: Keras
Speed of C programs, relative to Java
[rquote=689428&tid=160035&author=woelen]The methods I use also work well for multiple roots. ...
13-12-2023 at 03:39
by: Keras
Speed of C programs, relative to Java
[rquote=689402&tid=160035&author=woelen]Polynomial root finding really is a science on its o ...
13-12-2023 at 00:31
by: Keras
Speed of C programs, relative to Java
Did you experiment with fixed point arithmetic?
12-12-2023 at 08:06
by: Keras
Speed of C programs, relative to Java
Okay, I apologise, I assumed (wrongly) you were simply dabbling with root finding. I see you’re ve ...
11-12-2023 at 22:43
by: Keras
Speed of C programs, relative to Java
[rquote=689335&tid=160035&author=woelen]I am working on a library for polynomial root findin ...
11-12-2023 at 12:48
by: Keras
Oxalyl Chloride Challenge
[rquote=689299&tid=82462&author=EF2000]If you want to try it, take care. Triphosgene is ofte ...
10-12-2023 at 03:44
by: Keras
Oxalyl Chloride Challenge
[rquote=675943&tid=82462&author=ErgoloidMesylate][rquote=674973&tid=82462&author=Ker ...
9-12-2023 at 00:07
by: Keras
Koh and dcm
[rquote=689069&tid=159995&author=woelen]With CHCl3 things are different. CHCl3 is more react ...
3-12-2023 at 06:13
by: Keras
Sulfuric acid purification problems
Speaking of, I wonder if anyone has already recycled sulphuric acid used for diethyl ether synthesis ...
22-11-2023 at 01:33
by: Keras
Z Library seized
The files have not been deleted. The servers are (supposedly) located in Russia. Only the domain nam ...
17-11-2023 at 00:42
by: Keras
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