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

LSD and Light Spectrums

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- Mon, 16 May 2016 20:11:19 EST lbU1QW82 No.77892
File: 1463443879658.png -(1054257B / 1.01MB, 1440x900) Thumbnail displayed, click image for full size. LSD and Light Spectrums
I don't understand how during the synth of LSD during a certain part a spectrum of light needs to be present to complete a step.
2 posts and 1 images omitted. Click View Thread to read.
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press !QUHukXEvkY - Tue, 17 May 2016 17:05:33 EST QpnKQ24z No.77895 Reply
>>77894
is this some kind of netjester experiment where you try to randomly generate replies?

theres a lot of chemistry that requires certain frequencies of light, but photosensitive chemicals such as lsd require the absence of certain frequencies of light.

you dont need to have certain light in the synth of lsd in order to synth it, you just need to omit certain wavelengths in order not to have it degrade. this kind of shit is why there are a lot of flasks that are made from brown glass.
>>
Ernest Pockham - Wed, 18 May 2016 15:53:33 EST R2l5z5+y No.77897 Reply
>>77895
Someone I respect said it and I'm like wuuuutt and then I read it as a random post on the future so I didn't understand it.

Thanks for clearing it up.
>>
Bombastus !RZEwn1AX62!!xXxJO70U - Wed, 25 May 2016 20:47:11 EST Ym/MkWsP No.77911 Reply
>>77895
I believe the synth route calls for a certain wavelength of light in so that you're not working in the dark.
The experimental procedure probably assumes your knowledge of photodegradation and tells you to use x-y spectrum of light because x-z and x-a will degrade it.

For example, if one compound degrades in both UV and IR light, you should avoid light sources that are active in the 200-480nm and 650-900nm region. I would probably write the experimental procedure saying "use this cheap light I can find at Home Depot that only emits light at 550-600nm. This is so that you can still fucking see while doing your reaction.

Anyone know of this or anything similar?

View Thread Reply
- Wed, 25 May 2016 16:41:28 EST 9AVsKPcg No.77908
File: 1464208888300.jpg -(93151B / 90.97KB, 526x531) Thumbnail displayed, click image for full size. Anyone know of this or anything similar?
Hello,

I hope this is a good place to ask this. I'm curious to know if anyone has heard of a med called Proglumide &/or is there a way to obtain it or create it or something similar. I think this med originally started as a stomach med but had the side effect of reversing people's tolly to opi's. From what I can remember reading yrs ago, this med worked best if taken for 3-4 days than take a 2-3 day break from it. Ofcourse it's not scribed anymore. This could be of such great help to the countless amounts of people who have to take opi's every day to deal w/pain. I guess we can thank the govmt or big pharma for taking something like this off the market, money is more important.
So my questions are this, does anyone know if this med can be obtained anywhere &/or could this med be created? Would it be possible to create something like it?
Aside from all the common potentiators I can't think of anything that would actually reverse a tolly to opi's, except in a round about way, DXM.
Thanks so much for any input any one is able to provide!

Phenethylamine naming

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- Sat, 16 Apr 2016 01:53:53 EST zsw9I8fO No.77844
File: 1460786033681.jpg -(28573B / 27.90KB, 285x176) Thumbnail displayed, click image for full size. Phenethylamine naming
How can it be called phenethylamine when that clearly is a propyl group?
9 posts and 1 images omitted. Click View Thread to read.
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Nathaniel Brooklock - Fri, 20 May 2016 18:58:54 EST j2okwtbe No.77900 Reply
>>77844
It is in some pre work out supplements, which people obviously feel some effect from so I wouldn't say it's dosage is around 1.6kg

LSD - need assistance

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- Wed, 27 Apr 2016 00:27:38 EST vl+XBlOj No.77866
File: 1461731258071.gif -(166839B / 162.93KB, 327x540) Thumbnail displayed, click image for full size. LSD - need assistance
I'm sorry for bringing this here, I already posted it on /b/ and /psy/ but you guys seem like you know what'll dissolve and what'll be absorbed in the stomach.
I purchased LSD last week that's supposed to be dosed at like 300ug, I am concerned about the substance on it though. I trust the person who got the LSD to me but he might have unintentionally given me something not LSD.

What I wanna know is if I swallow the "LSD tab" if the other chemicals will dissolve if it's not actually LSD. A friend and long time psychonaut told me I had nothing to worry about if I just swallowed it. Help me out?
2 posts omitted. Click View Thread to read.
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press !QUHukXEvkY - Thu, 28 Apr 2016 01:53:26 EST QpnKQ24z No.77869 Reply
fucking hold it under UV-light at either 254nm or 366nm (i havent tested any other wavelengths)
if the blotter fluoresces it most likely is LSD or a close relative.
25I-NBOMe does not fluoresce under the same conditions.
>>
Phoebe Sibblepat - Mon, 02 May 2016 15:07:58 EST 46/eGtv8 No.77876 Reply
>>77866
Buy a regent test kit mango. It won't tell if its LSD but it will tell you if its not at least a lysergemid. Most lysergemids are about a physicslly beign as LSD anyways
Nb belongs on /psy/
>>
Charlotte Shakeham - Sun, 15 May 2016 19:32:45 EST +5AM2MwN No.77890 Reply
Isn't LSD really strong and easily absorbable. If you eat and don't just put it on your tongue won't you get really fucking high?

Future and Drug Safety

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- Tue, 10 May 2016 16:22:29 EST SBkA/DrJ No.77882
File: 1462911749036.jpg -(97335B / 95.05KB, 600x400) Thumbnail displayed, click image for full size. Future and Drug Safety
Is this the right place to ask this sort of thing?
I'm doing some research for a novel, and I have some questions about the future of drugs. My story is set in 2035. E-cigarettes, driverless cars etc are a lot more common, and as such smoking and alcohol related deaths are significantly less common. As such, what drugs will be more dangerous? Less dangerous?
I imagine some labmonkeys make opiates consumable through vaping. I also imagine some entirely new substances are discovered and there's a resurgence of drug paranoia/phobia as people begin to take these new and strange substances.
What do you think?
2 posts and 1 images omitted. Click View Thread to read.
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press !QUHukXEvkY - Tue, 10 May 2016 17:43:02 EST QpnKQ24z No.77885 Reply
>>77884
wouldnt this be a /lit/ thread?

sorry, im a wee bit too tired. nb
>>
Fucking Crollernutch - Tue, 10 May 2016 18:00:51 EST SBkA/DrJ No.77886 Reply
>>77885
I'm asking /chem/ as it's a question about speculating the future of drugs and drug forms. If /lit/ can talk chemistry to me, then sure.
>>
Barnaby Pickbanks - Tue, 10 May 2016 21:31:19 EST X4ILJZsh No.77887 Reply
I guess the better question is, what sort of drugs do you expect to become more commonly used in the future? Why?

Low yield nukes

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- Fri, 23 May 2014 06:43:15 EST sBVjj75A No.74752
File: 1400841795987.jpg -(29264B / 28.58KB, 512x640) Thumbnail displayed, click image for full size. Low yield nukes
>The smallest nuclear weapons actually deployed have had yields around 10 tons (like the W54), and have been intended for short range tactical or nuclear demolition use (e.g. blowing up roads and bridges).

>The absolute minimum possible mass for a bomb is determined by the smallest critical mass that will produce a significant yield. Since the critical mass for alpha-phase plutonium is 10.5 kg, and an additional 20-25% of mass is needed to make a significant explosion, this implies 13 kg or so. A thin beryllium reflector will reduce this, but the necessary high explosive and packaging will add mass, so the true absolute minimum probably lies in the range of 10-15 kg.

>The W54 warhead used in the Davy Crockett had a minimum mass of about 23 kg, and had yields ranging from 10 tons up to 1 kt in various mods (probably achieved by varying the fissile content). The warhead was basically egg-shaped with the minor axis of 27.3 cm and a major axis of 40 cm. The W-54 probably represents a near minimum diameter for a spherical implosion device (the U.S. has conducted tests of a 25.4 cm implosion system however).

http://www.veteranstoday.com/2014/05/22/constructing-the-nuclear-child/comment-page-1/#comment-539600

Low yield mini nukes. And if you're fretting OMG what if these fell in the wrong hands -

they already have. Pic related.
10 posts and 2 images omitted. Click View Thread to read.
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Charlotte Crevingchadge - Tue, 12 Apr 2016 20:32:38 EST G6JxVMCk No.77827 Reply
>>76013

Might be relevant in the coming 7 days.

Acetone

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- Mon, 02 May 2016 12:59:32 EST uYoSzwJB No.77874
File: 1462208372041.jpg -(69778B / 68.14KB, 1024x576) Thumbnail displayed, click image for full size. Acetone
Are you going to be flagged if you try to buy pure acetone online? I imagine store-bought nail polish remover has some contaminants.
Experiences?
1 posts omitted. Click View Thread to read.
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Hugh Clettinggold - Wed, 04 May 2016 12:50:49 EST fh+UlChj No.77877 Reply
Drug store "pure" acetone does have a contaminant, it is bitter flavoring to prevent abuse. As far as I am aware, hardware acetone (sold with paint thinners) is pure enough for most.
>>
press !QUHukXEvkY - Wed, 04 May 2016 13:21:51 EST QpnKQ24z No.77878 Reply
many brands of nail polish removers are ethylethanoate and actually pride themselves in being acetone free around here.

what do you need the acetone for? what purity grade do you need?
and most importantly in what quantities? small orders normally are ignored but if you order a volume above the limit you might draw some attention.
>>
Barnaby Fanshaw - Thu, 05 May 2016 00:04:41 EST zsw9I8fO No.77879 Reply
>>77878
I need it for doing a wash on drugs. It's okay if it's not 100% anhydrous, but it's the bitterants or other nasty stuff I want to ensure isn't in there.

What about acetone off ebay?

Psychadelic Manufacture

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- Sun, 06 Mar 2016 18:22:20 EST njYbfznv No.77712
File: 1457306540108.jpg -(1628458B / 1.55MB, 3888x2592) Thumbnail displayed, click image for full size. Psychadelic Manufacture
So I've been reading up on manufacturing LSD, and it really doesn't seem that difficult. All over the web you find people who have never made LSD saying it's really difficult, you're going to get yourself killed, etc. The equipment you need doesn't seem difficult to obtain or even expensive. Basic lab glassware & chemicals, pressure cooker for autoclaving, nitrogen, darkroom lights, UV lights, chromatography column & plates. Am I wrong in thinking anyone with some organic chemistry lab experience and fungus cultivation experience should be perfectly able to make LSD?

Yeah some chemicals are closely watched by governments (diethylamine), but from what I've read there's multiple ways to synthesize it, and it shouldn't be too difficult.

Also, why don't we see more pure psilocybin and mescaline? That seems VERY easy to extract. No worrying about decomposition and acquiring/synthesizing watched chemicals. Just get yourself a sox & column?
16 posts and 2 images omitted. Click View Thread to read.
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Bombastus !RZEwn1AX62!!xXxJO70U - Tue, 26 Apr 2016 14:37:37 EST b/5qTt5E No.77863 Reply
>>77862
No. Hypodermic LSD is not a thing. Otherwise the dealer I know who handles all his LSD without gloves would be tripping fucking balls every time he dropped it on the papes.
It was hypothesised that he was handling a lot of it (which he was) and ate some finger food without washing his hands and tripped off that.
>>
press !QUHukXEvkY - Tue, 26 Apr 2016 16:41:53 EST QpnKQ24z No.77864 Reply
1461703313605.gif -(1567959B / 1.50MB, 332x243) Thumbnail displayed, click image for full size.
>>77862
he wrote a book about his most famous discovery and all his over research into psychedelics. really recommendable, its a light read and not to heavy on the chemistry side.

>>77863
would you say that the guy would be hesitant to admit improper technique? back inna day youd still operate a pipete with your mouth or smoke in the lab
perhaps he doesnt remember, which seems plausible after a huge trip.

im very sorry for being a nuissance and a smartass, but it should be transdermal. hypodermic would imply that it was shoved under the skin instead of passing through it on its own.
isnt touching blotters detrimental to their shelf life? not like you should screw in a different light bulb everytime you handle them but gloves arent that hard to come by.
>>
Vehk !7HYGxe5v5c - Tue, 26 Apr 2016 19:53:53 EST uObvI0JQ No.77865 Reply
>>77864

I've heard a theory that he dosed himself purposefully and lied about it in order to protect his reputation as a research chemist.

Purifying deshcloroketamine

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- Sun, 24 Apr 2016 19:23:52 EST oFyUnb48 No.77859
File: 1461540232927.png -(32566B / 31.80KB, 620x805) Thumbnail displayed, click image for full size. Purifying deshcloroketamine
So I got 10g of deschloroketamine and it's a bit weak. I'd like to purify it further and I'm wondering what you folks would recommend doing. I'm taking ochem now so I know a little bit but not much about this type of stuff, I know with mxe folks just did an acetone wash and I'm wondering if that would still be a good idea for this, or what. No idea what the impurities would be unfortunately, but I doubt it's cut likely just a shitty synth (got it from china). Thanks

Lab equipment value

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- Mon, 18 Apr 2016 18:03:17 EST 5P3qbCIv No.77852
File: 1461016997388.jpg -(99067B / 96.75KB, 960x577) Thumbnail displayed, click image for full size. Lab equipment value
How much would be a reasonable price to ask for a set of reagents and chemistry equipment listed below:
>Round bottom flasks: (one neck) 1000ml, (three neck) 250ml, (two neck) 100ml, (one neck) 50ml
>Flat bottom flasks: (one neck) 1000ml, 250ml, 100ml, 50ml
>Handheld vaccuum/pressure pump
>120mm Buchner funnel with fine glass frit
>Plastic volumetric flasks: 250ml (x10), 100ml (x10), 50ml (x10)
>Hotplate with magnetic stirring, in new condition
>Glass gas washing bottle
>200mm Vigreux condenser colum
>200mm Liebig condenser
>60mm glass petri dishes
>100mm plastic petri dishes (x10)
>2ml glass vials (x20)
>120mm glass mortar and pestle
>150mm glass funnel
>125ml separatory funnel
Also there is a bunch of adapers, erlenmeyers, thermomethers, distilling joints, tubing for condenser, stoppers, glass tubing, different size magnets for stirrer, clips for stoppers etc.
Most of the joint sizes are 24/29 and some 24/40.

There is a plenty of reagents but shipping them to a country where they or most of them might be suspicious of even illegal is too much of a hassle. Where I live all of the chemicals and glassware are legal and bought from chemistry companies' outlets. The only one I suppose would be okay to sell abroad is:
>1g lab grade (merck) 10% Pd/C (stored in an amber glass vial)
Then about the reagents... there is something basic like:
>Formic acid
>c. HCl
>NaOH
>Glacial acetic acid
>H2SO4
>Drying agents
etc. etc.
Comment too long. Click here to view the full text.
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press !QUHukXEvkY - Tue, 19 Apr 2016 12:18:26 EST xFG0CGS+ No.77853 Reply
1461082706844.jpg -(45807B / 44.73KB, 513x572) Thumbnail displayed, click image for full size.
what country do you live in?

if you live in germany or austria id recommend selling the glassware on ebay. that normally gets you an okay price, though you might have to bundle up the smaller stuff. you could compose "destillation sets", and sell the bigger flasks seperately.
depending on the brand you could get a hundred quids upwards for the hotplate

as you said, selling the reagents would be too much of a hassle
but if youre in europe id like to know who sold you the Pd/C.
id give you ten bucks for the Pd/C unless its still factory sealed.
>>
Cornelius Pedgewell - Tue, 19 Apr 2016 13:50:28 EST De32qNxz No.77854 Reply
Just look up comparable stuff on ebay, but your most valuable piece is propably the 1l flasks because of hipster appeal and the stirrer.
All the other stuff i have seen for under 50eur
Selling reagents is not worth the trouble, no matter where you are, if its really legal theres no way to make a profit.

Id keep it tho, put it in storage and wait until you can use it again. Anyone who owns such a collection wont give up on the work forever, not for a woman.

Pure Oxycodone Synthesis - My Tek

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!!HToBa9dh - Sun, 10 May 2015 19:27:27 EST 4ppVjZXo No.76494
File: 1431300447686.png -(3571B / 3.49KB, 451x323) Thumbnail displayed, click image for full size. Pure Oxycodone Synthesis - My Tek
This was my old one. I'll post it up here in case anyone is interested/ can make corrections on it.
If you want clarification on anything, let me know. The hydrogenation (i think) will be the hardest part for any home chemist, let alone kitchen chemist.

The benefit of this synthesis is that it has no toxic chemicals, doesn't use chromate intermediates, and is made from relatively easy to acquire chemicals.
The downsides are that it requires a lot of chemical knowledge, knowledge on desiccant formations, and is much slower than the sodium dichromate method I have seen used (two refluxes that take up 24hours each are used)
Cod - Codeine
Codo - Codeinone
Oxo - Oxycodone

Workup of Aluminium Isopropoxide
In 250two neck RBF, set one neck up for reflux and one neck up for desiccation. Prepare a drying tube with CaCl2 and link it up to the vacuum adapter in the desiccation neck. Heat all the glassware to an ambient temperature of 80deg C upwards towards the allihn condenser. Proceed to blow air through the drying tube into the flask. Seal off the allihn condenser with a small amount of aluminium foil.
Desiccated aluminium dust (27.98g, 1.00mol) is ground to remove oxide layer and HgCl2 (0.01g) was added. The metal semi-amalgam is added to the bottom of the flask and desiccated isopropanol (250ml, 3.30mol) is injected carefully into the vacuum adapter septum. The vessel is left to reflux for 4 hours.
While still on reflux, the allihn condenser is removed and a 3-way adapter with a thermometer adapter is quickly added. The vacuum is attached to the receiver joint of the 3-way with a one neck 250 RBF while stoppering the side arm of the two neck flask tightly. A distillation is run until only solid aluminium dust remains in the still flask.
A yield of 80% of 1mol aluminium isopropoxide (163.4g) should be achieved.

Oxidation Step
In the same receiver flask of anhydrous aluminium isopropoxide, a desiccated solution of Cod in 100ml of toluene (6g, 20mmol) is added to a solution of aluminium isopropoxide (8.17g, 40mmol) and dried cyclohexanone (9.8g, 100mmol). The receiver flask was set up for reflux and heated for 24 hours.
After cooling the solution to room temperature, 50ml 2.5M hydrochloric acid was added to basify the Codo to Codo HCl and destroy any remaining aluminium. The organic layer was separated and washed with 2 x cc. of water; this layer contained toluene, cyclohexanone, cyclohexanol, and isopropanol. The aqueous layer was combined and 50ml 5M NaOH was added dropwise. The basified solution was washed with 3x 20ml DCM. The DCM was dried under magnesium sulfate and let to evaporate yielding Codo freebase.

9th Hydroxide/ Hydrogenation 1-pot, 2-step Reaction
In a 100ml RBF, 5g of Codo is combined with 10ml 80% formic acid, 5ml 30% hydrogen peroxide, and 1.5ml water. The flask is equipped with a allihn condenser and heated in a water bath at 55° C for 8 hours.
The reaction is taken off heating and cooled in an ice bath to 0° C. 0.5g of palladium chloride is added to the solution and is hydrogenated at 5atm for 24hours. The resulting Oxo solution is basified with 40ml of 30% sodium hydroxide and washed with 2x20ml DCM and 2x10ml diethyl ether. The DCM and ether solutions are dried independently to yield pure Oxo freebase.
107 posts and 5 images omitted. Click View Thread to read.
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Ru-lover - Thu, 14 Apr 2016 15:48:37 EST 1yz9Gpwk No.77834 Reply
>>76494

New isomerization was tried ! With my favorite element Ruthenium black !

***Codeine extraction***

28x60mg of codeine pills with only lactose as excipient are crushed up and dissolved into 20ml dH2O. After a few hours, the suspension is filtered, the filtrate is stirred with 50ml CH2Cl2 and the aqueous phase is made strongly basic with conc NaOH. The aquesous phase immediatly turned to milky white. The two phase system is stirred for 2h. The organic phases is separated and the aqueous one is extracted with 2x50ml CH2Cl2. The org phases are combined, dried over Na2SO4 and rotavapored. After vaccum the oily residue crystallised to for white crystals. Yield 1.25g of codeine freebase from 1.68 g codeine phosphate.

***isomerisation***

The residue (1.25g codeine freebase) is added into a solution of 2.5 ml H2SO4 2M and 5ml dH2O (H2SO4 0.75 M). The crystals dissolves up on heating to 60-70 °C. 30 mg Ruthenium black is added and the black suspension is refluxed overnight under argon athmosphere. Next day, the ruthenium is filtered on the frit, washed with water and recovered for future use. The slightly yellow filtrate is basified with conc NaOH. The light brown precipitate that immediatly appears is filtered on the frit, washed with dH2O and air dried. The combined filtrate are extracted with 3x50 ml CH2Cl2. After drying and rotavaporing the tan powder are combined and weighed around 1.1g of hydrocodone.

***Notes***
1) Argon athmosphere doesn't seem to be necessairy here, it matters to try without tough.
2) Reaction Time could probably be shorter, TLC is required to determinate the end of the reaction
3) Purity seems to be ok
4) H2SO4 conc. must be as low or lower than 1M to not destroy the substrate after long refluxing time. Its a pity the conc. is not precised in the original patent.
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Bombastus !RZEwn1AX62!!xXxJO70U - Thu, 14 Apr 2016 21:23:54 EST V1Ngvki3 No.77838 Reply
>>77834
Were your filtrates needles or flakes? Also, why were you fixated on ruthenium once more? i have found that palladium works equally and is easier to locate
sorry if you've already answered. uh

Patents never have precise concentrations. They dont' need to. The papers I've found have used codeine HCl with 0.48M sulfuric acid
In my computer projections, because of the catalytic amount needed, I've used down to 0.5M of sulphuric acid with the same yield. it actually got so fucking stupid that I would weigh out a 5ml graduated cylinder, pour sulphuric acid into it, pour it out, then measure the weight of the residual sulfuric acid. then add 5ml of water and calculate the W/V molar mass of the subsequent liquid.
It's silly.

The only issue is that you have to calculate the codeine <-> sulfuric acid acid:base reaction if you're using freebase.

Why are you using deuterated water again?

When it comes to times, my computer projections have never had a TLC monitoring program because it literally happens incredibly quickly. I've gotten the number down to 90 minutes of refluxing and took it off with two separations (one being caffeine, one being co).
>>
Ru-lover - Fri, 15 Apr 2016 18:31:31 EST 1yz9Gpwk No.77843 Reply
>>77838

In the method its some kind of amorphous crystals or rather more flake-like than needles.

Method with palladium was done a long time ago but did not work out well : dark brown color and several unknown spots. I thought the method was not working well (in fact it was probably too concentrated H2SO4 and long reaction time that destroy the compound in that old method) and I was reading plenty of patent about ruthenium catalyst. You already tried successfully with Pd, so I decided to post the method of ruthenium ;)

In the method dH2O means distilled water, not deuterated.

Ruthenium seems here to be more active than Pd, you need less Ru per g of cod. Did you try other computer projections with a smaller Pd/cod ratio ?

Do you have the solvent infos and TLC rf of cod and HC ?

Do you think the reaction work by skipping the pill extraction, just by dissolving the pills with excipients in H2SO4 and refluxing with Pd or Ru ?

By the way, as you post a method about oppenhauer oxidation of cod I'd like to point out I was reading a patent and I found an interesting oppenhauer oxidation of DHC to cod at ambian temperature with tBuOK/benzophenone in cyclohexane here :

Codeine (11.71 g), benzophenone (48.32 g), 5% palladium on carbon wet (67% water) catalyst (0.37 g), and cyclohexane (57 mL) were charged into a stainless steel autoclave. The autoclave was evacuated and filled with hydrogen. The mixture was mechanically agitated at ambient temperature (25–29° C.) while the hydrogen pressure was maintained at 19–38 psi until the pressure drop caused by the hydrogen consumption stopped. Cyclohexane (120 mL) was charged into the autoclave followed by solid potassium tert-butylate (16.22 g), the mixture was mechanically agitated under nitrogen at ambient temperature for overnight, and then quenched with 1.5N acetic acid (150 mL) with mixing and cooling in the ice bath. The mixture was filtered, aqueous layer was separated and the organic layer was extracted with 1.5N acetic acid (5 mL). Combined aqueous layer was washed with isopropyl acetate (12 mL) and assayed by HPLC. Aqueous solution (176 mL) contains 58.4 mg/mL hydrocodone (90% yield), purity 96 area %.

Coefficient of drag of runners and cyclists

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- Thu, 14 Apr 2016 12:27:35 EST DtZ5lIsF No.77833
File: 1460651255089.gif -(10417B / 10.17KB, 710x531) Thumbnail displayed, click image for full size. Coefficient of drag of runners and cyclists
At what speed (MPH or KPH) does aerodynamic drag become a factor for various items?

I know that for automobiles drag becomes a factor when you're in the 30-40mph ballpark, but what about bicyclists or runners? It's easier to determine the coefficient of drag of, say, an airplane or a car because they're (more or less) static objects, but a cyclist moves their legs and a runner moves their legs and arms.

I'm wondering about this because when I'm on a stationary bike, I'm able to pedal faster with more power when I'm in the typical forward fold versus when I'm pedaling upright-- aerodynamic forces are pretty well negated in this case. The same thing goes for running-- if I'm jogging upright on a treadmill versus leaning forward, I produce more power and speed when I'm leaning forward because my center of gravity has shifted-- but does leaning forward provide any specific aerodynamic benefit for anyone who isn't running as fast as Usain Bolt?
>>
Nell Hagglestat - Sun, 17 Apr 2016 15:28:41 EST 6SGTYI6Z No.77850 Reply
Sounds like a difficult question to answer, but if you're running on a treadmill then do aerodynamics even matter? It seems like they wouldn't compared to normal running.

The Manhatton project is why the Pryamids are really real

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- Sat, 06 Feb 2016 22:12:47 EST NPo+K9eR No.77626
File: 1454814767570.jpg -(119457B / 116.66KB, 736x652) Thumbnail displayed, click image for full size. The Manhatton project is why the Pryamids are really real
If the whole society of America came together to create the A-Bomb and that was an endeavor of a whole society , what evidence of the same thing could be used to disprove that aliens built the Pyramids?
4 posts omitted. Click View Thread to read.
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Sidney Fanworth - Fri, 12 Feb 2016 03:54:29 EST X6HIP3d/ No.77651 Reply
>>77638
Mathematically you can only place one block of a pyramid at a time
>>
Nigger Mucklepune - Sat, 13 Feb 2016 06:21:15 EST +DZfgoAX No.77655 Reply
>>77651
There's a load of blocks on each layer so you'd be able to work from several different angles bring blocks in. You wouldn't even need to be placing adjacent blocks if you planned it right/on the higher levels. Of course as you go up and it gets narrower this slows down. But most of the blocks will be on the lower levels. You might be placing several remote blocks and joining them up for example. What am I missing?

Hydrogenation without a pressured hydrogenator

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- Sun, 06 Mar 2016 19:24:22 EST 5P3qbCIv No.77713
File: 1457310262241.jpg -(4147030B / 3.95MB, 3000x2590) Thumbnail displayed, click image for full size. Hydrogenation without a pressured hydrogenator
Can this be legit?
Refluxing codeine in an acidic medium with finely grounded Palladium without a hydrogen gas supply to Yield 85-95% of dihydrocodeinone?
https://www.erowid.org/archive/rhodium/chemistry/dihydromorphinones.html
Sounds too easy as anyone has an access to a simple refluxing setup, palladium metal, codeine and an acid. Also to my understanding dihydrocodeinone is a fuckload more potent than codeine...
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Bombastus !RZEwn1AX62!!xXxJO70U - Sun, 20 Mar 2016 14:48:35 EST vbS8CtHn No.77758 Reply
>>77732
The only way to separate codeine from hydrocodone is either to react all the codeine to hydrocodone.
Or alternatively, you could run a column on them.
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press !QUHukXEvkY - Tue, 22 Mar 2016 15:35:02 EST pAeUlupM No.77765 Reply
1458675302660.jpg -(153465B / 149.87KB, 960x960) Thumbnail displayed, click image for full size.
>>77758
im paaaaaretty sure that crystallization would be sufficient -eventhough they have very similar- solubility as long as theres more product than educt. but then again a short glass tube and some alumina wouldnt cost the world. id have to guess that alumina would be better for the seperation since the codeine is a tad more polar and since sillica tends to fuck with amines. im also guessing it easier to buy and cheaper at a reasonable mesh.

id try and prove my point had i been smart enough to get some Pd/C and if codeine werent sceduled in this shithole.
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Ru-lover - Mon, 11 Apr 2016 15:50:28 EST XzFsS2/x No.77823 Reply
>>77765
Try extraction of the HCodo with bisufite solution. Then crystallise out the HCodo with NaOH.

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