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Chemical supplier that ships overseas
The attitude post offices have towards chemicals ordered from other countries varies widely by natio ...
17-1-2019 at 14:42
by: CobaltChloride
Preparation of SnCl2 dihydrate (Stannous Chloride)
I was able to make this salt by a much more simple procedure.

After dissolving the tin in an exc ...
2-1-2019 at 12:17
by: CobaltChloride
K2Cr2O7 from (NH4)2Cr2O7
Easiest way would be to make saturated solutions of KCl and ammonium dichromate and then combine the ...
12-12-2018 at 06:17
by: CobaltChloride
When Chemistry Goes Wrong
Wait, even concentrated NaOH eats PTFE? AFAIK, only molten very reactive metals (like sodium) react ...
3-11-2018 at 09:46
by: CobaltChloride
Loose ground glass?
Did you grease the joints with silicone grease? This usually makes them much less susceptible to lea ...
31-10-2018 at 23:00
by: CobaltChloride
Lab equipment
It is way too weak at 300W. You're much better of buying second hand good hotplates stirrers from br ...
31-10-2018 at 22:57
by: CobaltChloride
Help Identifying Reaction
That's most certainly it. I know the color acetone tends to get after prolonged contact with sodium ...
29-10-2018 at 09:46
by: CobaltChloride
Fitting a Ground Glass Joint to a Steel Plate
In this video, you can see how NileRed was able to make an air-tight connection between the paint ca ...
27-10-2018 at 10:06
by: CobaltChloride
Bad days in the lab or with glassware?
I was recrystallizing some benzamide (about 15g) from toluene and I accidentally knocked over the be ...
26-10-2018 at 11:51
by: CobaltChloride
Why are the words pnictogen and chalcogen rarely used?
I'd guess that a major reason is that the chemical properties of the halogens are very similar, whil ...
21-10-2018 at 16:27
by: CobaltChloride
How hazardous is mercury droplets?
[rquote=545494&tid=99039&author=Hendrik]The situation you described doesn't seem to be reall ...
21-10-2018 at 10:33
by: CobaltChloride
Safe disposal of wastes
Compared to countries like the UK, it isn't chemophobic. I can get, or easily make most reagents I w ...
20-10-2018 at 07:42
by: CobaltChloride
Safe disposal of wastes
I generally agree with your view, but I have to say that amateur chemistry is very different from th ...
20-10-2018 at 06:39
by: CobaltChloride
HF + HNO3
@Tsjerk: That isn't really a good comparison. Red fuming nitric acid would very rapidly and vigorous ...
19-10-2018 at 10:53
by: CobaltChloride
HF + HNO3
Nothing bad would happen if you just combine the fluoride and nitric acid (as long as you add just 0 ...
19-10-2018 at 06:53
by: CobaltChloride
HF + HNO3
Theoretically, just adding the salt should work, but I doubt it is soluble in fuming nitric acid. Th ...
19-10-2018 at 06:13
by: CobaltChloride
Rooto vs Liquid Fire
In Europe they sell Cleamen 420 drain cleaner. The MSDS lists the only ingredient being 98% sulfuric ...
2-10-2018 at 11:06
by: CobaltChloride
Cleaning glassware and other equipment
I found a nice way of cleaning oxidized stainless steel crucibles. The oxide coating is calcined and ...
28-9-2018 at 07:59
by: CobaltChloride
Sodium Permanganate
I wouldn't suggest using a AA battery. Get the cheapest and biggest battery you can find. Those cont ...
10-9-2018 at 22:02
by: CobaltChloride
Sodium Permanganate
That method isn't very good as illustrated in another thread (https://www.sciencemadness.org/whisper ...
10-9-2018 at 06:21
by: CobaltChloride
Cleaning glassware and other equipment
I never saw any wash bottle made out of PP. All the wash bottles I saw were made of LDPE which is th ...
10-9-2018 at 01:37
by: CobaltChloride
Sodium Permanganate
The specific info I presented there is in part from Nurdrage's video on making KMnO4 where he says t ...
10-9-2018 at 01:28
by: CobaltChloride
Sodium Permanganate
This will simply not work even if you melt the reagents. In order to achieve a decent yield of manga ...
9-9-2018 at 21:19
by: CobaltChloride
We should be using metric/SI prefixes on currencies
In some languages, they already use SI prefixes. For example, in French you can say 32 KEUR (kilo-eu ...
9-9-2018 at 10:00
by: CobaltChloride
Last chemical order?
Isn't glacial acetic acid sold at beekeeping stores where you live? In almost every bigger town in R ...
8-9-2018 at 00:59
by: CobaltChloride
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