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new toys
Polycarbonate is great stuff for impact and strength, but it gets hazed by chemicals quickly. For ...
20-7-2017 at 05:24
by: Dr.Bob
Heating mantle
Looks like a decent item, not sure how long it will last. I prefer the simple plain heating only o ...
18-7-2017 at 06:18
by: Dr.Bob
Synthesis of a biologically active compound
Looks like a graduate research target.

I can see two ways to get to the left (south west) part ...
18-7-2017 at 06:12
by: Dr.Bob
What to look for in a soxhlet extractor?
I will second using coffee filters, the official thimble filters are expensive and a pain. Just nma ...
16-7-2017 at 18:18
by: Dr.Bob
Synthesis of Indole-3-butyric acid (rooting hormone) - how difficult is this?
your route to 6-oxohexanoic acid sounds plausible. Step 2 may require base rather than acid, not s ...
14-7-2017 at 18:34
by: Dr.Bob
Running Anti-freeze and ice through condenser instead of H2O and ice?
We use chillers and glycol mixes to cool our rotovaps, it works fine. That is the ideal way, you c ...
11-7-2017 at 18:42
by: Dr.Bob
Science equipment looking for a home
I just want to let people know that I am out through the end of the week, so if you are trying to ge ...
7-7-2017 at 04:11
by: Dr.Bob
Methylating and deprotecting boc protected amine
You can alkylate N-Boc with NaH and MeI, DMF is typical solvent. And reducing the Boc to the Me wo ...
5-7-2017 at 18:35
by: Dr.Bob
Questions about Amberlite Resin loading capacity
I would guess that they really mean 1.0 mmol per mL, but the numbers vary a lot. Also, as you use ...
5-7-2017 at 18:31
by: Dr.Bob
Exclusive Pd/C pressure reactions that are easily tested.
The problem is that most reactions are highly dependent on substituents, protecting groups, if any, ...
2-7-2017 at 18:12
by: Dr.Bob
Sodium borohydride conservation
You could likely just add some sodium acetate, carbonate or hydroxide to the reaction first and then ...
28-6-2017 at 11:48
by: Dr.Bob
Molecular Sieve dehydration efficiency, how effective is letting it sit without stirring?
If you wait a few days, they will work fine. The water will find them eventually, it moves around ...
28-6-2017 at 03:22
by: Dr.Bob
Easy pyridine synth. found in a paper, does it work?
It depends on what the pyridine is being used for. If it is just being used as a base and solvent, ...
26-6-2017 at 07:29
by: Dr.Bob
Aryl methoxy groups selectively cleaved to phenols by lithium iodide
Pyridine is often used as the solvent in these reactions, the pick of solvents often is determined b ...
25-6-2017 at 04:36
by: Dr.Bob
Ordering from Chem Companies
It's simple, if you are using it for research on animals, you would have to have paperwork showing y ...
25-6-2017 at 04:24
by: Dr.Bob
The Problem with SynthSource
I understand your challenge, trying to do this type of work, along with a day job and family issues ...
22-6-2017 at 12:44
by: Dr.Bob
Identify This?
Drying pistol it is, if you need more, I have a few also to get rid of. As stated, the idea was to ...
19-6-2017 at 07:05
by: Dr.Bob
Pyrimethamine Synthesis?
The kids were directed by a trained chemist, they did not just randomly do this. But it is a great ...
16-6-2017 at 17:47
by: Dr.Bob
Acetone acetals as fuels?
That is a good idea, n-butanol appears to be a much better fuel than ethanol, and the waste acetone ...
12-6-2017 at 11:39
by: Dr.Bob
How to secure glass stopcock; ptfe stopcock discussion
A few types of simple stopcocks are standardized, at least in America. In glass, there are #2, #4 ...
6-6-2017 at 18:30
by: Dr.Bob
Why is silver antibacterial?
Many heavy metals can substitute for other metals and mess up the function of enzymes. Mercury and ...
5-6-2017 at 19:22
by: Dr.Bob
Nice deal on 100 mL glass reagent bottles, US shipper
I just got a box also, shipped very fast and as listed. Great deal. So if anyone wants a few, let ...
1-6-2017 at 18:08
by: Dr.Bob
Nice deal on 100 mL glass reagent bottles, US shipper
I ordered a box to check out, if anyone wants just a few, I am happy to sell some for $1 each, you c ...
29-5-2017 at 18:22
by: Dr.Bob
Reusing disposable bottle top filters - with new filter paper??
Jut buy a glass membrane filter holder. They are designed to use disposable filters and can be reus ...
29-5-2017 at 18:21
by: Dr.Bob
For small amounts, that is pretty reasonable. Many chemicals are made by the ton, but still cost a ...
29-5-2017 at 18:10
by: Dr.Bob
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