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Author Topic: How long does ketone last for?  (Read 197 times)

thescientist3000

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How long does ketone last for?
« on: March 12, 2012, 09:53:22 PM »
You know which ketone the ferret is talking about  ::)

At optimal storage conditions, how long before degrading to useless garbage? 

Ferret has read in some write-ups that 6 months went through fine, but how about a year or two?

TS

lugh

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Re: How long does ketone last for?
« Reply #1 on: March 12, 2012, 10:58:04 PM »
Does the ferret's friend know enough to use:

http://127.0.0.1/talk/index.php?action=search

http://127.0.0.1/talk/index.php/topic,1407

http://127.0.0.1/talk/index.php/topic,2505

instead of wasting members' time asking for spoon feeding   ::)  There's a lot more information on this subject to be found but the ferret's friend is going to have  to find it the so called hard way  :P  Maybe the ferret's friend should learn to use their local science library too 8)

« Last Edit: March 12, 2012, 11:07:24 PM by lugh »
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Vesp

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Re: How long does ketone last for?
« Reply #2 on: March 12, 2012, 11:07:28 PM »
Or the short questions thread is also a decent option, especially if you have shown that you've tried to find the answer yourself.

Already I can tell now -- it isn't going to be a straight forward answer as it is all going to depend on purity, temperature stored (I.e very deep freeze is probably better then normal freezer) and all of that jazz like light, type of impurities, exposure to air/etc... maybe something could be added to it that slows or removes any degradation products that encourage further decomposition and so on as well...

But yeah -- use the search engine, and then also try to use the short questions thread for this -- clearly it doesn't fit the wanted quality for a thread in this section.
Consider looking over the rules a bit. :)
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thescientist3000

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Re: How long does ketone last for?
« Reply #3 on: March 13, 2012, 02:35:45 AM »
Ferret had a nice response, but alas back button hit, and all gone...

Lugh- ferret did do a search, keywords ketone, stability, months, years.  same threads popped up.  if you read those threads completely like ferret did before posting this thread you will find no answer.

Vesp- ferret did look for the short questions thread, but couldnt find it under all of the threads menu.  is is perhaps a "sub" thread or how does one get to it?   She did realize it didnt deserve spotlight, so she posted in other, rather than synthesis as it tends to be a little less looked at. 

Ferret does appreciate the moderating, and the forum.  She will attempt to follow rules, but as you know ferret has short memory span and sometime never learns.  Much appreciation though. This can be a major undertaking these internet doings, so appreciation.  Thanks Vesp.

TS

Vesp

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Re: How long does ketone last for?
« Reply #4 on: March 13, 2012, 06:52:39 AM »
http://127.0.0.1/talk/index.php/board,4.0.html

First link - I just created a short question thread 2.0 -- they are highlighted in pink at the top.
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fresh1

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Re: How long does ketone last for?
« Reply #5 on: March 13, 2012, 07:53:17 AM »
 Hey TS I agree there are some nooks and crannies in this hive where things like the short q's thread, and the reference section hide, so I totally empathize with you.

and  the search engine here has its 'moments', which has been mentioned from time to time, so you're not alone ;)

could I perhaps ask why the need/desire to store for long? It seems an uneccesary risk to take, but thats just me, 'n fresh is best, imo ;D

as vesp says, there are many factors, with purity being very relevant, and then air, temperature and light would likely be the biggest culprits to begin with, so if you arent sure about these things, . As a simple rule of thumb play it safe and keep it in a cool dark place in an airtight container with as little airspace as possible, for as little time as possible.

 In this neck of the woods It doesnt seem to stay unused for long at all ;)

nice one vesp, with SQ2 the first thread was getting cumbersome.  Maybe keeping SQ's down to say 20 pages per incarnation would make it easier to peruse should one feel so inclined 8)

And good luck with your endeavours S3000

f1 :)
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antibody2

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Re: How long does ketone last for?
« Reply #6 on: April 02, 2012, 11:17:11 PM »
Your ketone will be more stable over the long haul if you store it as a bisulfite adduct, after distilling it. It will also be more legal that way, arguably, depending on where you are located. Where Ab2 lives MDP2P is a scheduled substance, the bisulfite adduct is not 8)

fishinabottle

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Re: How long does ketone last for?
« Reply #7 on: April 03, 2012, 04:39:01 AM »
Quote from: antibody2 on April 02, 2012, 11:17:11 PM
Your ketone will be more stable over the long haul if you store it as a bisulfite adduct, after distilling it. It will also be more legal that way, arguably, depending on where you are located. Where Ab2 lives MDP2P is a scheduled substance, the bisulfite adduct is not 8)
So you can order a drum of this from China and its legal?

/ORG

antibody2

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Re: How long does ketone last for?
« Reply #8 on: April 03, 2012, 07:46:30 PM »
I don't want to take this thread off topic, but I would describe it as more of a gray area than being outright legal. It will vary depending on where you are located.
It's possible that it could be prosecuted through the analogues act, but as far as I know that law has never been invoked. The last time I was going through the criminal code, I did come across a similar law that stated if the substance could be easily converted to a scheduled substance then it too was considered scheduled. But again, I am unaware of any precedent for it being applied.

IMHO the only thing being risked would be the cost of a consignment being confiscated. Much the same as ordering RCs from overseas, some orders make it through others don't, but never any charges laid, so far ...

Sydenhams chorea

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Re: How long does ketone last for?
« Reply #9 on: April 20, 2012, 10:17:44 AM »
I've kept distilled 2,3-dimethoxy-4,5-methylenedioxyphenyl-2-propanone for over 5 years unrefrigerated in a brown glass bottle, and it remained quite good, as was proven by the practically quantitative yield of oxime received. It did change color from greenish yellow to reddish orange over the years though.
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newbiechem

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Re: How long does ketone last for?
« Reply #10 on: May 04, 2012, 01:22:25 AM »
Quote from: Sydenhams chorea on April 20, 2012, 10:17:44 AM
I've kept distilled 2,3-dimethoxy-4,5-methylenedioxyphenyl-2-propanone for over 5 years unrefrigerated in a brown glass bottle, and it remained quite good, as was proven by the practically quantitative yield of oxime received. It did change color from greenish yellow to reddish orange over the years though.

WOW unrefrigerated?? thats awesome!! im always so scared that will die after 30 minutes outside freezer hehehe

your ketone was probely very pure right? since the purity seems to afect stability.

Shake

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Re: How long does ketone last for?
« Reply #11 on: May 04, 2012, 07:43:36 AM »
yes this is good news! i was worried that the DMA wacker ketone was no good becasue it was never refrigerated, i guess we might have results sooner that we thought

salat

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Re: How long does ketone last for?
« Reply #12 on: May 04, 2012, 03:05:42 PM »
Check out MSDS on these products you can get good info - if they put a certain chemical in it like they put % methanol in formaldehyde that is usually a clue it is needed for stability.  They ship MDP2P without any freezing or anything.  Nothing about storing it in the freezer.   Although I suspect they have a much cleaner product than home produced makes.  Beware storing stuff that decomposes into gas in glass bottles - can cause the bottle to break.

This is an excerpt from a MSDS

Section 10 - Stability and Reactivity

Chemical Stability:   Stable under normal temperatures and pressures.
Conditions to Avoid:   None reported.
Incompatibilities with Other Materials:   Strong oxidizing agents.
Hazardous Decomposition Products:  Carbon monoxide, carbon dioxide.
Hazardous Polymerization:  Has not been reported

Section 7 - Handling and Storage

Handling:  Avoid breathing dust, mist, or vapor. Avoid contact with eyes, skin, and clothing. Keep container tightly closed. Avoid ingestion and inhalation. Use with adequate ventilation. Wash clothing before reuse.
Storage: Store in a cool, dry place. Store in a tightly closed container.
Salat
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