Leave these fields empty (spam trap):
Name
You can leave this blank to post anonymously, or you can create a Tripcode by using the format Name#Password
Subject
Comment
[i]Italic Text[/i]
[b]Bold Text[/b]
[spoiler]Spoiler Text[/spoiler]
>Highlight/Quote Text
[pre]Preformatted & Monospace Text[/pre]
[super]Superset Text[/super]
[sub]Subset Text[/sub]
1. Numbered lists become ordered lists
* Bulleted lists become unordered lists
File

Sandwich


420chan is Getting Overhauled - Changelog/Bug Report/Request Thread (Updated July 26)

A /chem/ thread not about drugs

View Thread Reply
- Wed, 20 Sep 2017 11:31:48 EST yU3xLtgU No.78855
File: 1505921508942.jpg -(505047B / 493.21KB, 2304x1728) Thumbnail displayed, click image for full size. A /chem/ thread not about drugs
This is a thread about pool chemistry since it's pertinent and relevant to my daily duties.

What I wanna know is if Sodium Bicarbonate has a pH of about 8 how then is it helping me keep my pH between 7.4-7.8?

Seriously, this is the hardest thing to explain to non chemistry enthusiast coworkers of mine. That and the relationship between Cyanuric Acid and Free Chlorine
4 posts and 1 images omitted. Click View Thread to read.
>>
Priscilla Summleworth - Fri, 22 Sep 2017 18:43:30 EST hBAZGxou No.78865 Reply
b/c it's dilute silly

didn't you ever have a chemistry set as a kid? dilution is like one of the only things you can even do with them these days

if you add 100 gallons of pH 8 to 1000 gallons of pure water you're gonna get a pH of like 7.2
>>
Phineas Blatherman - Sun, 24 Sep 2017 16:43:22 EST EmAQ3RSJ No.78868 Reply
1506285802300.jpg -(127412B / 124.43KB, 500x375) Thumbnail displayed, click image for full size.
>>78864
My level in chemistry is like 1000 level course in college plus more reading on my own. I understand how cyanuric bonds to the FC to keep it in the pool. I'm fuzzy on the carbonate buffering. pH is wacky in a few places and I'm trying to pin down a cause and also they may have me train employees and I like to know everything and assume others would as well instead of having to dig for the information like me.

Tree growing

View Thread Reply
- Sun, 18 Jun 2017 11:26:00 EST ZPX2kpEE No.78694
File: 1497799560552.png -(771440B / 753.36KB, 639x375) Thumbnail displayed, click image for full size. Tree growing
I just read on circlejerk that some trees can reach 100ft to 300ft in a matter of a few years, if this is true why dont we just farm trees instead of cutting down rain forests?

I mean it seems possible, you might have to stick to certain types of wood but still, on top of that you could plant a shit load more trees to help with climate change.

I'm no expert though, just some thoughts.
14 posts omitted. Click View Thread to read.
>>
Nell Cinkinped - Thu, 07 Sep 2017 14:53:13 EST hBAZGxou No.78842 Reply
bamboo and hemp are both very strong in tension but also very flexible and therefore not very strong in compression. there are different kinds of strength required for different applications

Dutch team thinks liquid metal can help cool nuclear fusion reactor walls

View Thread Reply
- Mon, 07 Aug 2017 07:34:27 EST X+zhyYNN No.78770
File: 1502105667272.jpg -(52291B / 51.07KB, 640x480) Thumbnail displayed, click image for full size. Dutch team thinks liquid metal can help cool nuclear fusion reactor walls
My penis is so rock hard right now.

https://www.differ.nl/news/metal-vapour-to-protect-fusion-reactor-walls
8 posts and 1 images omitted. Click View Thread to read.
>>
press !XIxc6BpKnU - Fri, 01 Sep 2017 15:18:42 EST PJ0/E4z+ No.78814 Reply
>>78812
ill never look you in the eye as i fuck your fat as fat ass ass. i promise balls wont touch.
shitpost quota filled.
>>
Schepperschop - Sun, 03 Sep 2017 18:47:58 EST 81NLKdBS No.78823 Reply
>>78814
You dont know what love is you are a homosexual.

Cones rods

View Thread Reply
- Sun, 20 Aug 2017 22:54:37 EST 72cJMkb0 No.78777
File: 1503284077101.jpg -(182636B / 178.36KB, 1328x747) Thumbnail displayed, click image for full size. Cones rods
How many molecules of air can your iris pik up?
Aka. How much in a single dot of air
1 posts omitted. Click View Thread to read.
>>
Edwin Trotway - Wed, 30 Aug 2017 01:03:57 EST vSFc8qUQ No.78800 Reply
how many photons or something?? or are you talking about field of view. Field of view is pretty blurry lines as far as what is being fully perceived and what is peripheral.
>>
Charles Pockford - Sun, 03 Sep 2017 14:05:40 EST +YUSEic8 No.78819 Reply
>>78778
This is the funniest comment on 420chan right now

genetic diversity

View Thread Reply
- Tue, 04 Jul 2017 23:34:57 EST BSeQaa1k No.78720
File: 1499225697763.jpg -(193016B / 188.49KB, 1500x1125) Thumbnail displayed, click image for full size. genetic diversity
How important is genetic diversity?

My mother and father are very far removed, my father being mostly Slavic/Eastern European, and my mother being mainly Celtic. My paternal grandparents are also very distant from each other, my paternal grandmother being Russian/Belarusian, and my paternal grandfather being Ukrainian and Turkish. However, it turns out that my maternal grandparents are third or fourth cousins, so I guess there is some inbreeding there. Realistically, what are the impacts of this?
15 posts and 1 images omitted. Click View Thread to read.
>>
press !XIxc6BpKnU - Fri, 01 Sep 2017 11:05:51 EST ak42GqP4 No.78811 Reply
1504278351531.png -(1349B / 1.32KB, 153x71) Thumbnail displayed, click image for full size.
DICKS EVERYWHERE

ethanol without methanol

View Thread Reply
- Sat, 05 Aug 2017 11:06:50 EST Sj2brtVd No.78760
File: 1501945610321.png -(112884B / 110.24KB, 300x366) Thumbnail displayed, click image for full size. ethanol without methanol
I got some 70% denatured alcohol but now I hear it is deliberately poisoned with methanol to prevent consumption (what kind of asshole would do such a thing is beyond me). Do you know of any way to get a solution of just ethanol, without methanol, from common shops?
3 posts omitted. Click View Thread to read.
>>
Hedda Saffingchad - Mon, 07 Aug 2017 03:46:53 EST +YUSEic8 No.78768 Reply
>>78762
18% is probably a bit high without the turbo yeasts, the highest % i've managed was 15% with a very good yeast. But you can get up to around 30% with freeze distillation (fractional freezing)
>>
press !XIxc6BpKnU - Mon, 07 Aug 2017 04:02:05 EST PJ0/E4z+ No.78769 Reply
1502092925674.png -(149512B / 146.01KB, 391x391) Thumbnail displayed, click image for full size.
  1. mix water, yeast nutrients, tomato paste and citric acid
  2. make yeast starter
  3. add yeast to the sugar sludge
  4. build still while waiting for fermentation and settling to complete

or just order non denaturated hooch on the internet
homedistiller.org
>>
Bombastus Werrywag - Mon, 07 Aug 2017 09:04:18 EST RP4l/Dxt No.78771 Reply
>>78762
To my knowledge, methanol doesn't form an azeotrope with ethanol. Anhydrous samples can be distiled and collected that way. If it's 30% methanol, you can just distill out 30ml of a 100ml sample and it should be fine once the temperature reaches 75C

ALIENS!

View Thread Reply
- Tue, 13 Jun 2017 06:18:18 EST aZjxDii8 No.78682
File: 1497349098334.jpg -(42883B / 41.88KB, 475x288) Thumbnail displayed, click image for full size. ALIENS!
in businesses there's a book that has a phone number for a place you call in case of extra terrestrials, what's their number?
someone should call them and let them know that you've found an alien who's claiming key word: Jesus Christ!
3 posts omitted. Click View Thread to read.
>>
Bombastus !uYErosQbLM!!Mybq1UbK - Fri, 23 Jun 2017 13:02:47 EST E1Us5n5n No.78706 Reply
>>78699
POKEMON
POKEMON MASTER
POKEMON ARE THE CHAMPIONS
>>
Bombastus Werrywag - Wed, 28 Jun 2017 02:08:03 EST 0tetFdrb No.78713 Reply
>>78709
y u ruin our perfectly good thread?
>>
John Dartville - Thu, 03 Aug 2017 18:03:31 EST ORz+tP6a No.78759 Reply
Fuck now I want a cig

Science .PDFs

View Thread Reply
!!kWjRhGF5 - Thu, 27 Jul 2017 22:42:18 EST GBUzU4oL No.78756
File: 1501209738564.png -(123434B / 120.54KB, 1920x1080) Thumbnail displayed, click image for full size. Science .PDFs
Hi there /chem/, there is a website where you can download a lot - and I mean thousands - of science textbooks (all categories) for free. Most of them are in .pdf files, but there are a number in the .epub, .mobi, and .djvu formats as well. I uploaded a small selection of what I've gotten at Zippyshare, here:

http://www44.zippyshare.com/v/3IAuapuz/file.html

They cover the hard sciences and run at about 135 MB for the .zip file.

The website is here:

http://gen.lib.rus.ec/

and please read their "Letter of Solidarity," here:

http://custodians.online/
>>
Clara Fuckingcocke - Wed, 02 Aug 2017 02:39:16 EST zi8Fqzy7 No.78758 Reply
thanks m8, will definitely give it a dig

Synthesis of ghb (free acid) from gbl

View Thread Reply
- Tue, 18 Jul 2017 22:06:27 EST 1reNg8pO No.78749
File: 1500429987701.jpg -(42696B / 41.70KB, 500x345) Thumbnail displayed, click image for full size. Synthesis of ghb (free acid) from gbl
Hey/chem/
I recently came across some lab grade gbl (gammy-butyrolactone) which is the precursor to GHB. I've got a few questions because I've never find GH and I'm having a hard time finding some info from chemists who know what they're doing.

Firstly, I wanted to make GH in its free acid firm, rather than the common sodium butyrate salt. What I want to know are whether its fine to take it in free acid form. I think the pka is about 4, so it shouldn't be too sour if diluted in water, but taking it in free acid produces the same effects right? I assume that taking the sodium salt would Judy result in it finding in the acidity of the stomach anyways, I just would prefer to not have to eat a bunch of salt on the side.
Also, did I do something wrong in my procedure?

I started with about 10g gbl weighed analytically, and calculated the moles for sodium hydroxide which was between 6-7g, but I put in some excess to try to push the reaction forward.
I then added a bit of water, roughly 20mL in a round bottom flask, added the hydroxide and then the gbl. After a few minutes, I capped the flask and put it in an oil baths at 70 celcius.
After 2-3 hours, I added a bit of hydroxide to make sure the reaction was basic and he GH would be in its salt form, then I washed the solution with ether 3x to get rid of any remaining unreacted gbl. I took the aqueous layer and added HCl from a 1M solution until the pH was about 2-3, low enough for the gh to be in its acid form. I think the problem is here, because I couldn't find concentrated acid so I ended up adding a lot of water on the side..
Then my last step was to extract the ghb from the autos later with ether. I did this about 3x, combined the etherI'm layers, and evaporated off the ether. I was left with 2g when theoretical yield should have been about 12g.

Do you think that because I ended up using so much water, my remaining gh is in the aqueous solution? I know theree acid is readily soluble in both water and ether, so I'm wondering if this is my problem.

Also, how can I test the solution to show I have ghb with no gbl? I don't want to use the NMR spectrometer just in case somebody ends up seeing the spectrum and asking questions
1 posts omitted. Click View Thread to read.
>>
Lydia Clannerfeck - Thu, 20 Jul 2017 17:47:14 EST UoTssc8h No.78751 Reply
ayy so GBL is a prodrug to GHB. You could just eat the GBL.

Keep extracting the aqueous layer. There's probably more in there. Also try adding some salt (NaCl) to the water to lower the solubility of the GHB in it.

You can tell if there's any GHL in it by taste. GHL supposedly tastes awful whereas GHB is tasteless.
>>
press !XIxc6BpKnU - Sat, 22 Jul 2017 18:28:22 EST PJ0/E4z+ No.78753 Reply
>>78751
ghb has a distinct taste too, it just isnt as fucking horrible as gbl
somewhere between gasoline, coconut and soap
OP have you considered to simply mix the gbl with a sodium carbonate solution to get a ready to use sodium ghb solution.
obviously youd have take in more volume but it always worked for, although getting too much sodium isnt too healthy and the sodium salt gave me just as much diarhea as gbl.
since the sodium salt is hygroscopic anyways youd have to hustle to keep it dry


https://www.erowid.org/archive/rhodium/chemistry/ghb.html
>>
Cyril Sunnertot - Mon, 24 Jul 2017 16:41:05 EST CwYciqLe No.78754 Reply
Thanks for the replies everyone. I found a paper and read that ghb is rarely found in its free acid form as it readily converts back to GBL. This back conversion happens even more easily in acidic conditions, which I used to try to protonate the free acid. I will extract as much of what is most likely gbl now from my aqueous solution using salt to push it to the organic layer, evaporate any ether and water left over and mix the gbl back with a small excess of sodium hydroxide. I'll calculate it so that once all the gbl had reacted with the sodium hydroxide in a 1:1 stoichiometric fashion, that the pH will be about 8.5 at the end in a small precculated volume so the ghb doesn't convert back to gbl

Thin Layer Chromatography

View Thread Reply
- Mon, 19 Jun 2017 12:24:25 EST hzoMepax No.78695
File: 1497889465751.png -(861058B / 840.88KB, 726x728) Thumbnail displayed, click image for full size. Thin  Layer Chromatography
gonna make some TLC plates using some glass microscope slides, wondering what the best paper to use for cellulose is? i was thinking using a thin tissue or something but it's incredibly soft and porous which makes me think that i might not get very clearly defined results. any suggestions?
3 posts omitted. Click View Thread to read.
>>
Cedric Dreffinghall - Tue, 11 Jul 2017 13:49:20 EST 4tmtdVyg No.78737 Reply
>>78735

As far as destruction of the sample, when you choose a solvent for solvating the material, it must do two things:

Dissolve the sample
Be inert to the sample

As an example, sulfuric acid will probably dissolve your sample, but will typically make a poor solvent due to the likelyhood of it protonating the shit out of your sample. A solvent like octane will make a good solvent for non-polar materials because it is straight chain hydrocarbons which are non-reactive under standard conditions. Same concept with acetone, except for polar samples.

Both octane and acetone can become reactive with the right materials under the right conditions, and that's why you need to know what your sample reacts with so you can choose a solvent that will both dissolve the sample and be inert to it.
>>
Bombastus Werrywag - Tue, 11 Jul 2017 17:45:21 EST QGxEeR56 No.78745 Reply
>>78737
You can use pure water if paper is your stationary phase.

BK-2-CB > Injectable 2-CB solution?

View Thread Reply
- Thu, 06 Jul 2017 06:02:36 EST A0Fffnyd No.78722
File: 1499335356854.jpg -(407511B / 397.96KB, 1024x768) Thumbnail displayed, click image for full size. BK-2-CB > Injectable 2-CB solution?
Have tried this three (3) times with repeatable results:

2ml sterile water

(x) amount of Ascorbic Acid to sufficiently acidify the water (No precise measuring equipment available)

(x) amount of B-K-2-CB (As above)

Add enough Ascorbic Acid (it is believed Citric as supplied in UK would work as well) to the water to dissolve *Without Heating*

Add (x) amount of B-K to dissolve with *a very little heating* or you're going to be injecting recrystallised 2-CB - exciting as that sounds, it is fucking painful and could possibly end very quickly in sudden cardiac arrest, depending on which vein is used... *BE VERY CAUTIOUS*

Enjoy your instant stimmy effects followed by typical 2-CB effects



IF ANYTHING AT ALL IS WRONG / POTENTIALLY LETHAL ABOUT THIS PLEASE POST ASAP!!!

PS enjoy one and all any potential profits made from this discovery
8 posts and 3 images omitted. Click View Thread to read.
>>
Samuel Davingdidge - Fri, 07 Jul 2017 12:44:17 EST UoTssc8h No.78733 Reply
The standard procedure for reducing ketones to alkanes in one step is the wolff-kishner reduction, which requires complexation of the ketone with hydrazine (used in rocket fuel) and heating the mixture to 200 C for a few days to a week. ascorbic acid is a MILD reducing agent, and there is pretty much zero chance of this method producing even fractions of a percent of yield of 2CB from bk-2CB. The placebo effect is a much better reducing agent, but still not as good as hydrazine.
>>
Hannah Susslebury - Fri, 07 Jul 2017 16:36:34 EST rANt8sEP No.78734 Reply
Awesome guys, thanks for all the info... Back to the drawing board then, or a very expensive lab...
>>
Bombastus Werrywag - Tue, 11 Jul 2017 17:43:46 EST QGxEeR56 No.78744 Reply
1499809426609.jpg -(60156B / 58.75KB, 514x569) Thumbnail displayed, click image for full size.
>>78731
>>78733
You don't need need Hydrazine. LiAH could work because of the conjugation from the pi ring. If LiAH does work, then you can just do it using the pop bottle test and overkill it with LiAH. No water allowed, of course.

A simpler, cheaper, but much harder method is clemmenson that is an in-situ reducing agent (hydrogen gas) by mixing a zinc or mercury amalgum and with HCl or HBr

>>78729
keine chemische ist legal im deutschland... danke, praesident der E-U.

From what my basic knowledge of receptors tells me (from around one and a half pharmaceutical chemistry courses i took a while ago) is that that ketonic group would be much less active than 2c-b for dopamine / serotonin effects. it could possibly give you the side effects of the compund but none of the mental, spiritual, or stimulating properties.

Extract Heroin from Garlic Paste

View Thread Reply
- Mon, 01 May 2017 08:23:55 EST GJqJPZ5S No.78644
File: 1493641435717.jpg -(5774B / 5.64KB, 259x194) Thumbnail displayed, click image for full size. Extract Heroin from Garlic Paste
This is urgent as my life literally depends on it. My suppliers showed up with what was seemingly my regular kg pickup but actually was 10kg of garlic paste with the heroin suspended within it somehow. Am told that I have to extract the materials from the paste for them or I will exist no more.

Will a simple Acid Base extraction do the trick IE:

Mix Paste into Water + Lye Solution and Agitate for hour

Add solvent of choice (Cold Distilled Water + Methanol Mixture?)

Let contents settle

Siphon Solvent and Evaporate to retrieve powder

Purify powder using known methods via HCL / Diethyl Ether



Can anyone tell me if this is adequate enough? Im essentially going to go in blind and hope this process works and that I don't get killed in the process.

Hope you guys read this and realize where opis may lead you as it has lead me....hopefully not to my death.
4 posts omitted. Click View Thread to read.
>>
Cyril Hasslespear - Fri, 30 Jun 2017 08:46:34 EST BIUvdYqW No.78716 Reply
>>78644
bro, no one is gonna send valuable tar in garlic powder, I hope you die for being tar dealer
>>
George Depperfit - Sat, 01 Jul 2017 11:12:11 EST 4tmtdVyg No.78717 Reply
Holy lol,

I wouldn't try acid base, I'd start with an aromatic solvent like xylene. Diamorphine is highly aromatic and you're more likely to get a hit on a non polar aromatic solvent. Plus acid base is typically used to free chemicals from plant matter. Since garlic doesn't naturally contain morphine, or any forms of it, I would think that the morphine is mixed in rather than bonded with the garlic in any way.

I would try soaking the material in xylene for an hour, placing the mixture in a cheese cloth, and squeezing the liquid into a separate container, preferably glass since some plastics are soluble in aromatic/non-polar solvents. Then chill the strained liquid in a freezer and scrape up the solids that come out. Use the liquid left over to soak the garlic again for a second and third extraction.

More than likely, the solids that appear after freezing will be dirty with garlic compounds as well, but it's the first step in the right direction. after that, just purify it.
>>
George Depperfit - Sat, 01 Jul 2017 11:20:59 EST 4tmtdVyg No.78718 Reply
Oh wow, this thread is old as fuck

OP, you dead?


Work thoughts

View Thread Reply
- Sun, 21 May 2017 07:51:22 EST ZPX2kpEE No.78655
File: 1495367482443.png -(245976B / 240.21KB, 398x297) Thumbnail displayed, click image for full size. Work thoughts
Does anyone else think of dumb shit while they're at work? Yesterday I was thinking about bubble theory, what if this entire universe repeats itself exactly when it ends.

So everything happens again and again in one big circle, like how your pulse keep pulsing and your lungs keep breathing, what if the solar system is an element like those in the periodic table, I mean if you look at one then you see the electrons orbiting around a neutron or something right?

I realise all this is very retarded but this kind of thinking does help the hours go by.
5 posts omitted. Click View Thread to read.
>>
Betsy Dapperwater - Mon, 12 Jun 2017 18:56:07 EST 4tmtdVyg No.78680 Reply
1497308167717.gif -(921544B / 899.95KB, 171x141) Thumbnail displayed, click image for full size.
>>78679

>which states that electrons form clouds

I always thought that the 'cloud' was a conceptual method to help us visualize what is happening at the subatomic level, as in the cloud is the average position of the electron while the electron is still a minuscule fraction of the cloud as a whole.

Does the electron take up the entire space of the cloud? Or is located at a single point in the cloud which we average to be spatially accurate? Or is it both? Or is it neither? Am I here now or am I an average of my current position? Am I real?
>>
Ernest Bubberbanks - Wed, 14 Jun 2017 00:00:06 EST GaLvZHtU No.78684 Reply
>>78680
Read the other anon's post. The cloud isn't a "cloud", it's a probability field where the electrons are about 90% of the time.
When you get down to such small particles they don't behave like matter, so it's hard to visualize. Basically these electrons pop in and out of existence and preferably along this cloud, albeit sometimes outside.

Report Post
Reason
Note
Please be descriptive with report notes,
this helps staff resolve issues quicker.