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Denatured alcohol

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- Mon, 26 Dec 2016 15:26:13 EST H7AhQjrZ No.78423
File: 1482783973025.png -(231824B / 226.39KB, 331x522) Thumbnail displayed, click image for full size. Denatured alcohol
I have this product (see image), and I evaporated a few drops on a clean mirror and it left a noticeable residue.

In the SDS (https://www.korellis.com/wordpress/wp-content/uploads/2016/05/Alcohol-Denatured.pdf) it only lists methanol and ethanol as components, so what is the residue left behind, and how harmful would it be to consume?
6 posts omitted. Click View Thread to read.
Shitting Mimmlefirk - Thu, 05 Jan 2017 12:57:20 EST kquaKHd6 No.78445 Reply
Looking @ page 3, subsection 3 of that msds:

Ethanol concentration is 30-50%
Methanol concentrate is 40-60%

So, the ethanol/methanol mixture will make up between 110% and 70% of what's in that can. The other 30%? Prolly shit from wood when they made this 'wood alcohol'
Shitting Mimmlefirk - Thu, 05 Jan 2017 13:07:13 EST kquaKHd6 No.78446 Reply
Honestly, it's probably exactly the sort of thing that you don't want to go into your body. As in, Exactly. Polyaromatic hydrocarbons, heavy metals, sulfur and nitrogen compounds. Everything that's bad except for biologically derived venoms.
Martha Nicklewill - Thu, 12 Jan 2017 23:07:52 EST DZQn4yU5 No.78466 Reply
They do this on purpose to make money from alcohol tax.

Pretty sure it's not listed on the MSDS and it distills over at similair temps.

DIY Batteries

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- Tue, 10 Jan 2017 11:48:31 EST 32cXOz64 No.78461
File: 1484066911864.png -(1801389B / 1.72MB, 863x1343) Thumbnail displayed, click image for full size. DIY Batteries
sup /chem/,

Looking for some decent DIY battery ideas. Doesn't have to be too compact, but I would like for it to fit on a desk perhaps and be able to shit out roughly 1.5-3.5V and maybe max ~25mA.

I've tried my had at a few types (pic related: quick dirty Earth battery with copper and zinc cathode/anodes) including earth (using several combos of cath/anodes), zinc-air, Al-air, and am setting up to create a MnO2+Alum/graphite cell just to test.

Question: What are some decent DIY battery builds? I'm not asking for any steps, simply just metal combos and whatever medium suites said combo. The charge density isn't all that important as it's to be expected to need to be recharged/reloaded. I'm certain with another cathode/anode in the Earth Battery pictured and a simple joule thief, I could squeeze out around 1.5V (haven't checked the amps yet). The idea here is just to get more ideas for DIY batteries and perhaps ideas for better performance. I'm aware of galvanic series and electrical potential, so I believe this thread is best suited for discussion and possibly personal experience.

trypto - Wed, 11 Jan 2017 21:28:31 EST ltcKYWSL No.78463 Reply
I think some type of lead-acid battery would be best. I don't have any experience with it, but it sounds like a cool project.


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- Tue, 03 Jan 2017 12:29:11 EST 2qfcsxJx No.78437
File: 1483464551616.jpg -(8271B / 8.08KB, 250x250) Thumbnail displayed, click image for full size. Solubility
I recently did some undergraduate research with a professor in organic synthesis and was curious about what the factors for solubility are. I was under the impression that it was all about size and polarity, but i'm getting conflicting results. I had synthesized several molecules which had phenyl groups. Since this was some discovery chemistry, I made "copies" of these molecules but with substitutions at the para positions of the aromatic ring in order to increase reactivity through electron withdrawing effects (para-nitro substitution) or decrease reactivity through electron donating effects (para-methoxy substitution).

What I noticed was that my molecule which had two phenyl rings with para-substituted nitro groups was more polar than the same molecule with no substitution (least polar) and that with the para-methoxy (middle polarity), but it had the worst solubility of the three.

In fact, the one with the unsubstituted aromatic rings was the most soluble in methanol, despite being the least polar.

What factors are at play here? the nitro compound basically only dissolved decently in DCM, which made working with it incredibly frustrating. Yet slightly more or less polar solvents didn't or barely worked to dissolve it. I'd like to know what factors to consider for the next time I work in a lab so I can more easily predict some of the properties of the molecules I'll be synthesizing.
2 posts and 1 images omitted. Click View Thread to read.
Esther Sarringlane - Fri, 06 Jan 2017 13:36:53 EST zsw9I8fO No.78449 Reply
So if we have all these equations for solubility, how hard is it to throw it all into a program where you draw any molecule and find out what it's soluble in (and how soluble).
trypto - Sat, 07 Jan 2017 00:04:32 EST ltcKYWSL No.78457 Reply
It's faster to simply use a rule of thumb, and try 3-6 of the common lab solvents before you find the best solvent (and how soluble it is).

If you really wanted to do it computationally, then you'd need a great graphics card, and a workflow for DFT calculations. There's a handful of programs used for this, and they all have a high learning curve. Spartan is probably the easiest, though it's closed source and expensive. I don't know the exact steps needed.

In general, it's pretty hard.
trypto - Sat, 07 Jan 2017 00:09:24 EST ltcKYWSL No.78458 Reply
Actually, Amazon ec2 would be better than a good graphics card. But you'd still want a decent card for when you're leanring.

Climate Metric

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- Sun, 01 Jan 2017 23:14:21 EST VjvGmScF No.78431
File: 1483330461439.jpg -(18218B / 17.79KB, 529x163) Thumbnail displayed, click image for full size. Climate Metric
Imagine you have a big list of cities and wanted to concisely get an idea of what the weather is like over there.
If conciseness and speed wasn't a problem, you could look at a graph like that for each city, but that's not feasible.

So what metrics would you need to accurately capture the climate of that area? Less is better, so all I can think of is: average lowest temp, average highest temp.
Any other ideas?
9 posts omitted. Click View Thread to read.
Barnaby Samblewell - Thu, 12 Jan 2017 00:52:43 EST Q+12w2DB No.78464 Reply
>how do i climate



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- Sat, 24 Dec 2016 05:44:01 EST RKOZdJ0v No.78416
File: 1482576241169.png -(23568B / 23.02KB, 365x619) Thumbnail displayed, click image for full size. lifespan
sorry for the stupid question, chemistry is def my weakest area

a search tells me that PG USP/EP has a shelf life of two years when stored below 40°C (104°F) in closed containers away from sources of ultraviolet (UV) light.
should i only make enough solution to last a couple years? how long can refrigeration extend this?
2 posts and 1 images omitted. Click View Thread to read.
John Semmerforth - Mon, 26 Dec 2016 04:09:20 EST RKOZdJ0v No.78422 Reply

i'm getting a quantity of a research chemical large enough to outlive its legal status (presumably)
i know i can just... keep them not mixed, but i wanted to know if mixing would make the situation worse or not
David Noblingchene - Thu, 29 Dec 2016 00:56:04 EST Fe+cUsBQ No.78426 Reply
You will not regret keeping your entire stash out of solution. Isn't that enough?

Mescaline Creation

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!!HToBa9dh - Fri, 21 Aug 2015 17:13:58 EST 4ppVjZXo No.76958
File: 1440191638629.jpg -(42448B / 41.45KB, 460x422) Thumbnail displayed, click image for full size. Mescaline Creation
I just proposed this on /psy/ so let's see what you people think.

I do have an add-on, though. L-Tyrosine can be decarboxylated to Tyramine so you don't have to get a shitload of cheese to extract. From there, you can just brominate it selectively in basic conditions to brominate the carbons meta to the hydroxide. A simple LG > Hydroxide reaction later, you'll have 2,3,4 tri-hydroxyl(aminoethyl)benzene.

One simple reflux with 4eq of Methyliodide should yield mescaline in 95%+ yields. What do you think, /chem/?
78 posts and 16 images omitted. Click View Thread to read.
Nell Gecklecocke - Fri, 23 Dec 2016 23:17:17 EST DPjhXpIm No.78415 Reply
A good old methylamination with benzaldehyde then a reduction for some trimethoxyamphetamine, a 1000 percent increse in potentcy.
Schepperschop - Sat, 24 Dec 2016 13:33:31 EST xTIigKo1 No.78417 Reply
Find the cactus>>Eat the cactus
press - Sun, 25 Dec 2016 11:24:27 EST Hzvahzwj No.78419 Reply
i think you mean a henry condensation with a following reduction?

tfw calmus oil is expenis as fuck and you cant just go via reductive amination for tma2

Solubility question

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- Sat, 24 Dec 2016 18:26:32 EST 750GEpVs No.78418
File: 1482621992333.png -(491474B / 479.96KB, 500x484) Thumbnail displayed, click image for full size. Solubility question
Is α-Methylfentanyl alcohol soluble, or is there something else you'd recommend?


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- Fri, 15 Jul 2016 00:06:30 EST 2+q0LcOC No.78094
File: 1468555590148.jpg -(24503B / 23.93KB, 530x297) Thumbnail displayed, click image for full size. TiCl4
If Ti has the follow electron config as a base config: (where ^ represents an e-)

^^ ^ ^
4s 3d 3d 3d 3d 3d

would it hybridise to the following (to accommodate (Cl-)4)?
^ ^ ^ ^
sp3d sp3d sp3d sp3d sp3d

leaving it with a final config of (with bonded (Cl-)4):
^ ^ ^ ^ ^ ^ ^ ^
sp3d sp3d sp3d sp3d sp3d

thereby classifying it as a lewis acid because it can accept a lone pair?
i hope this makes sense

pic unrelated
2 posts omitted. Click View Thread to read.
Isabella Sullyshaw - Sun, 24 Jul 2016 13:14:18 EST R8K15vkj No.78110 Reply
use pre tags for
m o n o s p a c e
levi - Mon, 19 Dec 2016 08:54:13 EST 2kHGLnfS No.78406 Reply
hey man not sure im following you exactly, but it would be much easier to think of this in terms of CFT/ligand field model, as in 4 M-L bonding interactions lying lower in energy than the metal based d-orbitals (e and t2 sets) which have an occupancy of 4. Electronically speaking TiCl4 has low-lying MO's, of primarly Ti character, so yeah it is fairly electrophilic and a decent lewis acid. evidenced in that it happily forms adducts with donor solvents such as THF


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- Wed, 07 Dec 2016 16:09:37 EST mswwHH6I No.78386
File: 1481144977392.jpg -(169265B / 165.30KB, 1000x744) Thumbnail displayed, click image for full size. Salt
in a context of conducting a synthesis, does it matter whether a reagent is in a form of a salt or not? can you even make such a general statement?

i'm asking because im interested in the chemistry behind converting codeine phosphate to morphine. does it matter whether someone uses codeine phosphate or codeine freebase?

pic unrelated
5 posts omitted. Click View Thread to read.
James Lightspear - Sun, 11 Dec 2016 23:56:05 EST 9Opqdgsf No.78397 Reply
Depends on the solvent your going to carry out your reaction in. In most cases i can think of the freebase is required. Careful, codeine is easily destroyed by strong acids and bases. Hell, even heat and a little too much ammonia will do it. Also too much water and it will stay in the aqueous layer. Work as small as you can because 9 times of of 10 you will have failures.

codeine 300g/mol
codeine phos 397g/mol
ammonia 17g/mol
sodium carbonate 106g/mol

0.001mol 1mmol codeine phosphate = 397mg
add 1mmol ammonia = 17mg or 170mg 10% ammonia
or add 0.5mmol carbonate because there are 2 sodiums = 53mg
and you should be left with 300mg codeine

In reality you will likely need a little more base in many cases, but it gives you a general idea how much to start with.
Schepperschop - Wed, 14 Dec 2016 18:16:13 EST xTIigKo1 No.78404 Reply
Want morphine?
Ask Papaver!
That difficult?
Not really.

Query for good entry point into chemistry

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- Fri, 28 Oct 2016 13:21:20 EST g4yJTuN/ No.78329
File: 1477675280844.jpg -(42607B / 41.61KB, 480x391) Thumbnail displayed, click image for full size. Query for good entry point into chemistry
I've always wanted to stick my nose into chemistry and now I have some spare time to do it, so I wanted to ask,
does anyone have a recommendation on good material/literature to start out with?
6 posts and 1 images omitted. Click View Thread to read.
Doris Hellyfuck - Wed, 07 Dec 2016 23:54:51 EST g4yJTuN/ No.78387 Reply
1481172891901.png -(2208367B / 2.11MB, 1436x938) Thumbnail displayed, click image for full size.
Thanks for the pointers!

This is not really serious enough to warrant that. This is more something productive to do for fun instead of blunting my brain with those animoos and games. Checked out Zumdahl though, seems just right for my way of learning.

Actually found that one while browsing chemistry torrents, I love how far away it is from modern learning literature.
Jack Pankinstod - Mon, 12 Dec 2016 12:22:14 EST klMiQ9iI No.78399 Reply
I suppose you could go online and find an old chemistry text book and purchase that? That would be a good entry point anyway, instead of jumping right in and mixing a bunch of shit together in your kitchen
Schepperschop - Wed, 14 Dec 2016 17:50:14 EST xTIigKo1 No.78403 Reply
Heat food>>>does this taste better>>>why>>>chemistry

DXM Purification

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- Thu, 03 Nov 2016 21:26:09 EST HfyaiY9o No.78336
File: 1478222769896.jpg -(35595B / 34.76KB, 500x750) Thumbnail displayed, click image for full size. DXM Purification
Hello all,

I am interested if knowing the method for purifying DXM from over the counter medication. I have read that such a method exists and would like to learn more about it. I have some basic experience with chemistry and access to laboratory equipment. Could anyone please share the methodology and the background information? Thanks.
press - Fri, 04 Nov 2016 17:11:58 EST aoZYWjFW No.78337 Reply
what kind of preparation of DXM will you be using?
Bombastus !uYErosQbLM!!Mybq1UbK - Wed, 07 Dec 2016 00:26:09 EST MzxQ4oNO No.78385 Reply
Buy DXM from research chemical sites?

Anti-Radiation WIFI Antennas

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- Tue, 23 Aug 2016 16:39:24 EST zsw9I8fO No.78166
File: 1471984764869.jpg -(38747B / 37.84KB, 600x600) Thumbnail displayed, click image for full size. Anti-Radiation WIFI Antennas
Is this legit? What evidence do we have to backup that there's dangerous radiation coming from wifi antennas?

15 posts and 3 images omitted. Click View Thread to read.
Cyril Chaffingman - Thu, 24 Nov 2016 17:21:28 EST g4yJTuN/ No.78368 Reply
1480026088801.jpg -(156833B / 153.16KB, 400x581) Thumbnail displayed, click image for full size.
Just in passing...
Would covering a room in tin foil block out the cosmic rays?
Or would one need sturdier means?
Eugene Hezzlenure - Tue, 29 Nov 2016 13:57:03 EST K4ted3sw No.78375 Reply
Transmitting antennas are designed to be radiators. An anti-radiation "antenna" is a dummy load which is useful when you want to test a transmitter without radiating a signal.
Bombastus !uYErosQbLM!!Mybq1UbK - Fri, 02 Dec 2016 23:42:33 EST ZEo1qUmp No.78378 Reply
I actually don't know if this is a troll post or not. I mean, we literally have /tinfoil/ as a board.

Actually. I love this post

Transform dry vaped herb into bricks

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- Mon, 28 Nov 2016 10:34:32 EST nZCjXMk3 No.78373
File: 1480347272043.jpg -(1015945B / 992.13KB, 3264x2448) Thumbnail displayed, click image for full size. Transform dry vaped herb into bricks
Transform Dry vaped herb into (...)
11/28/16(Mon)19:25:41 No.8502283
992 KB
992 KB JPG
Hello !
I am playing the sorcerer's

> have ABV ( already been vaped weed ) . It can be grinded as a powder if necessary.
> want to put it together and make it a brick, or something else like solid

Problem, the herb is no longer sticky.

I tried to make it solid by adding a bit of water, let the sun evaporate it , and put this shit in tue fridge for like 10 minutes .... FAILURE, it gave me a muddy mixture ...( pic related )

Any advices ?

Filter Papers

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- Sun, 13 Nov 2016 15:32:34 EST zsw9I8fO No.78345
File: 1479069154587.jpg -(381434B / 372.49KB, 2048x1365) Thumbnail displayed, click image for full size. Filter Papers
As you can, there are a lot of types:

Which type should I get for basic gravity filtration of drugs?
Bombastus !uYErosQbLM!!Mybq1UbK - Tue, 15 Nov 2016 01:10:58 EST HCt0W/hp No.78348 Reply
do you have a vacuum filtration set?

if yes, 1-2 works best. if no, coffee filters work best. when dealing with pills, it's still best to use coffee filters
Vehk !7HYGxe5v5c - Sun, 27 Nov 2016 22:18:13 EST l5Akm3J6 No.78372 Reply

Coffee Filters are best, fine scientific filters tend to filter rather slowly. If you are working with Ibuprofen, you're better off decanting - it is heavy and highly insoluble even at room temperature, so it will form an adhesive block at the bottom of the container that won't fall out even when tilted at a strong angle. Paracetamol is a bit more awkward.

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