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How is yeast dried so its viable when re-hydrated
Right, if you try to store it at –20°C you will be disappointed.

Commercial "dry active yeast" ...
9-8-2020 at 17:33
by: Metacelsus
Why can metals above Hydrogen in the reactovity series be electroplated?
Yes, the activity series assumes everything is at 1 M. So, you wouldn't be able to plate zinc from a ...
8-8-2020 at 08:14
by: Metacelsus
Chromate/Dichromate thermite
If you just want chromium metal, you should reduce the dichromate to Cr2O3 first. The reaction will ...
3-8-2020 at 10:32
by: Metacelsus
Recommendations for synthesis of medicines and other medical organic molecules.
Benzocaine is also a good target. You can do toluene -> p-nitrotoluene -> p-nitrobenzoic acid ...
29-7-2020 at 05:12
by: Metacelsus
Would you feel comfortable using aniline and n,n-dimethylaniline (possible carcinogens) in a home lab?
I made toluidine in a home lab in the past. As long as you have good ventilation (fume hood or outsi ...
29-7-2020 at 05:10
by: Metacelsus
Health effects of acute, low concentration acid vapors.
Long-term (years) exposure to acid vapors is known to cause an increased risk of cancer. See: https: ...
23-7-2020 at 06:02
by: Metacelsus
Here are some STL files
You can use a program such as Slic3r to convert them to gcode for your printer.

[file]82328[/fil ...
18-7-2020 at 08:23
by: Metacelsus
Getting Discouraged With Organic Chemistry As A Hobby. Failed Steglich Esterification
You may have decomposed your product by heating it up too much. T-butyl esters can easily undergo el ...
17-7-2020 at 09:42
by: Metacelsus
KOMe / Potassium Methoxide Safety
I've never heard of potassium methoxide decomposing explosively, and I can't find any references for ...
16-7-2020 at 11:31
by: Metacelsus
Coal & Derivatives
[rquote=640576&tid=155788&author=SWIM]I see a 500 ml bottle of USP (medical grade) coal tar ...
14-7-2020 at 04:42
by: Metacelsus
Failed Henry reaction with 3,4,5-TMB
Here's the ammonium acetate procedure:

Aldehyde (25 mmol) and ammonium acetate (25 mmol, 1.93 g) ...
11-7-2020 at 12:46
by: Metacelsus
Reactions of mixed anhydrites
In general the product will be a mixture. If one side is more hindered than the other, the ratio cou ...
11-7-2020 at 06:03
by: Metacelsus
Failed Henry reaction with 3,4,5-TMB
Ammonium acetate is a perfectly good catalyst for this (giving 96% yields in my hands), there's no n ...
11-7-2020 at 06:00
by: Metacelsus
Amazing fluorescent precipitate of copper(I) with propargyl alcohol
I did copper(I) catalyzed couplings of propargyl alcohol with other terminal alkynes quite a few tim ...
9-7-2020 at 09:18
by: Metacelsus
Weird smell from Zn + FeSO4 reaction vessel?
It could be SO2 or H2S (reaction product of FeS and moisture).
6-7-2020 at 09:12
by: Metacelsus
Things I Will Never Make
[rquote=488834&tid=72825&author=JJay]I'd probably use phenyllithium and copper (I) chloride. ...
6-7-2020 at 09:08
by: Metacelsus
does autoignition temperature even matter when refluxing a liquid?,
If you have a system above the autoignition temperature, any leak will result in a fire. But in your ...
6-7-2020 at 07:22
by: Metacelsus
Precursors to um… something. Suggestions invited.
[rquote=639649&tid=155702&author=draculic acid69]The clorobenzaldehyde can be weighed per ml ...
2-7-2020 at 04:31
by: Metacelsus
Anhydrous Aluminum Chloride prepration
The ethanol will react with the AlCl3, since AlCl3 is a very strong Lewis acid. The final products w ...
30-6-2020 at 05:27
by: Metacelsus
UK source for stains & microbio stuff
Crystal violet is pretty cheap at Himedia, and very useful for Gram stains. I see $16 for 25 grams. ...
29-6-2020 at 08:05
by: Metacelsus
Why is tin and HCl rxn so slow?
From personal experience, Sn/HCl reductions of nitro groups go very quickly, producing tin chloride ...
28-6-2020 at 11:23
by: Metacelsus
Cyclic diester from 2,2'-oxydibenzoic acid?
Sigma-Aldrich pricing is bonkers. There's no way that's actually worth $5560/g.
15-6-2020 at 05:56
by: Metacelsus
Isolation and Synthesis: Benzyne?
I did my undergrad work on benzyne chemistry (specifically, the HDDA reaction). PM me if you'd like ...
6-6-2020 at 04:02
by: Metacelsus
Advice on buying a GC/MS
GC-MS is better, but the maintenance and operating costs will be higher. With IR you don't need gas ...
18-5-2020 at 05:25
by: Metacelsus
Questions about mRNA vaccine for Coronavirus
[rquote=636343&tid=155417&author=wg48temp9]So they synthesis a mRNA corresponding to part of ...
18-5-2020 at 05:22
by: Metacelsus
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