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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
Disinfection of rainwater
If you really want pure water, you have no other option than boiling it and collecting the vapour. B ...
12-11-2023 at 03:05
by: Keras
NaBH4 now on DEA Special Surveillance List
I suppose that if you buy 50 g of it you won’t get visited. It probably only matters if you’re b ...
9-11-2023 at 05:16
by: Keras
Weird things during nitric acid synthesis
[rquote=688346&tid=159937&author=Rainwater][quote]Beside, if you heat it over 600 °C, potas ...
4-11-2023 at 02:23
by: Keras
Weird things during nitric acid synthesis
[rquote=688324&tid=159937&author=Nikotin]Because there are not enough K+ Ions, so only one p ...
3-11-2023 at 03:39
by: Keras
Weird things during nitric acid synthesis
IMHO, using impure sulphuric acid to make nitric acid is not a good idea. The nitric acid will proba ...
31-10-2023 at 01:05
by: Keras
potassium perchlorate
KClO₃ is very easy to make from bleach. The best way is to make you own bleach, by bubbling chlori ...
21-10-2023 at 22:41
by: Keras
my crackpot theory of brominations in acetic acid
[rquote=687985&tid=159864&author=SyntheticFunk]
Based on the types of oxidizing agents used ...
17-10-2023 at 03:45
by: Keras
Differentiating K2CO3 and CaCl2
[rquote=687846&tid=159897&author=j_sum1][rquote=687845&tid=159897&author=Keras]Speak ...
8-10-2023 at 06:37
by: Keras
Differentiating K2CO3 and CaCl2
Speaking of, I've failed to find an ‘easy’ chemical test able to identify unambiguously potassiu ...
7-10-2023 at 22:35
by: Keras
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