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Mysterious chinese glassware sellers
The water spots you are seeing is residue from the flush coolant used when they grind the joint tape ... |
19-6-2017 at 11:09
by: Praxichys |
Sketchiest supplier site I've seen in a while.
Wow.
They're straight up selling methylone and anabolic steroids, preferring money transfers via ... |
2-6-2017 at 09:23
by: Praxichys |
RBF Male joint
Use a double-male adapter and you can attach any normal flask you want to it.
http://www.ebay.com ... |
31-5-2017 at 18:47
by: Praxichys |
Phenol
I was going to suggest the same. I have done it myself in fair yield. Salicylic acid usually runs ar ... |
30-5-2017 at 05:00
by: Praxichys |
6" i.d. glass tube & vacuum ?
A healthy coating of clear plasti-dip couldn't hurt either.
https://www.amazon.com/Performix-1120 ... |
26-5-2017 at 11:21
by: Praxichys |
How much have you spent on your lab?
I'm in the $10k-$20k range.
My stock sheet keeps track of a lot of it.
I built the lab itsel ... |
23-5-2017 at 11:41
by: Praxichys |
Filtering speed - same filter but poor results with vacuum pump
You might have some luck adding a small amount of a flocculating agent and allowing things to settle ... |
22-5-2017 at 07:47
by: Praxichys |
Lead recovery from glass, theory and practic.
Here is how I would try it:
Use a clean steel container. Powder the glass first with a hammer and ... |
21-5-2017 at 15:14
by: Praxichys |
Powder Train Composition
Google is your friend. Check out [url=https://www.google.com/patents/US4926752]US 4926752 A.[/url]
... |
15-5-2017 at 19:05
by: Praxichys |
eBay glassware seller has no idea what to call his listings, everything is a "beaker"
I think that might be the sublimation chamber for the cold finger condenser. |
15-5-2017 at 17:42
by: Praxichys |
Women in Chemistry
I have two younger sisters. Both enjoyed chemistry growing up, usually under my influence. One is a ... |
13-5-2017 at 17:14
by: Praxichys |
White Fuming Nitric Acid
I usually distilled KNO3 and H2SO4 without a vacuum to get RFNA and then used a fishtank air pump to ... |
13-5-2017 at 09:03
by: Praxichys |
eBay glassware seller has no idea what to call his listings, everything is a "beaker"
Nice find! Super goofy that a pile of burettes, condensers, and columns are "vintage beakers" ... I ... |
13-5-2017 at 09:00
by: Praxichys |
Ethyl acetate preparation - questions
The time it took to come to a boil could have been endothermic effects of initial ester formation, w ... |
12-5-2017 at 09:22
by: Praxichys |
Ratio HNO3 H2SO4 for PETN
Rereading that I suppose I should clarify the figure to 1.5:1 sulfuric:nitric; add more sulfuric if ... |
10-5-2017 at 17:46
by: Praxichys |
Ratio HNO3 H2SO4 for PETN
Use a 10-20% molar excess of HNO3 to ensure complete conversion. The amount of sulfuric acid doesn't ... |
10-5-2017 at 16:04
by: Praxichys |
Help! ... 25 litres of mystery liquid
I second that opinion. That looks exactly like diesel fuel but only because our "non-highway-use" ke ... |
8-5-2017 at 08:28
by: Praxichys |
Where to buy a 50 Liter Magnetic Hotplate Stirrer?
Why stir a vacuum distillation when you could just use an ebulliator? Pull a very thin tip on piece ... |
8-5-2017 at 06:23
by: Praxichys |
Two depictions of the same molecule.
Your understanding of benzene is incorrect. The benzene system is [b][url=https://en.wikipedia.org/w ... |
6-5-2017 at 07:42
by: Praxichys |
Preperation of isbutyl nitrite
Just be careful if you start exploring nitrites of small alcohols. IIRC the dinitrite of ethylene gl ... |
4-5-2017 at 08:46
by: Praxichys |
The Problem with SynthSource
Why Li-6 and not Li-7? They are both stable isotopes. Li-6 is the rarer of the two by something like ... |
4-5-2017 at 04:30
by: Praxichys |
The Problem with SynthSource
All right, the resin has arrived!
I have the following:
- Purolite NRW 3560Li7
- Purolite NRW ... |
3-5-2017 at 11:22
by: Praxichys |
Things I Will Never Make
I don't think there is anything I would flat-out refuse to work with. It's not really a matter of ho ... |
2-5-2017 at 06:11
by: Praxichys |
The Problem with SynthSource
@elementcollector1
Pretty much. They need to be regenerated with a stronger acid though. So, you' ... |
28-4-2017 at 08:41
by: Praxichys |
The Problem with SynthSource
All right, since nobody is getting it, I'll spill the beans.
It's ion exchange resin!
Kiss w ... |
28-4-2017 at 07:06
by: Praxichys |
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