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Offlinenightbringer
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Chemicals reacting w/ glass jars in A/B extractions?
    #11284699 - 10/20/09 04:34 PM (8 years, 1 month ago)

A couple days ago I had a little mishap with a jar partially full of DMT hydrochloride salt and naphtha... All I did was pick it up and lightly bump it into a lampstand (and seriously, this was a tap so light this jar would not have broken under normal conditions) as I was doing so and the thing cracked instantly all the way around, a little ways under the lid. I ended up losing a good 2/3 of liquid in the process, which I am not even that pissed about because I only started with $15 worth of Mimosa (I'm mostly just pissed about how much work I put into this!) but the whole thing is a little worrisome because it could have happened at any other time... I mean it seems to me that the glass was significantly weakened by all the strong acid and solvent that it was exposed to, so it got me thinking...

Do strong acids, bases, and solvents react with the glass that contains them, leaving your solution full of glass molecules in addition to everything else? If this were dangerous I'm sure no one would use glass containers, and in fact they are the preferred vessel for A/B extractions, so this must not be the case. But still, if acids and solvents are eating away at the inside of their glass container, that can't be good, right?!?

This has me thinking HDPE would be the best to use, but my understanding is that solvents will even react with those... and solvents are involved in 2/3 of the major steps in the extraction. So maybe a wise way to proceed, with a DMT extraction for example, would be using HDPE for the acidification step, then glass for the de-fatting and basification steps, to limit exposure to any one glass container?

I dunno, maybe I was just using a shitty jar that has taken too much abuse (it was a hand-me-down from a friend) but it's infuriating that all that's standing between your precious alkaloids and being lost forever is a weak layer of glass that could shatter at a moment's notice. This makes me want to switch to plastics, but am I right in that solvents and plastics do not mix? At the very least, I will have to get some thicker jars for next time.


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OfflineDr.Myco87
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Re: Chemicals reacting w/ glass jars in A/B extractions? [Re: nightbringer]
    #11287233 - 10/20/09 10:18 PM (8 years, 1 month ago)

I only use HDPE plastics for extractions, for this exact reason, I've never heard that solvents should not be used with HDPE, I'll have to do some research now. I've never heard of it happening from acids but I'm sure it's possible. I do know that lye is terrible for glass and after 2 extractions this glass jar I was working with had made a crack all the way around like you're describing but on the bottom, like where the corner is, since then I'm all plastics.


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Offlinepiracetam
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Re: Chemicals reacting w/ glass jars in A/B extractions? [Re: Dr.Myco87]
    #11287294 - 10/20/09 10:25 PM (8 years, 1 month ago)

i've used the same beakers and sep funnels for 5 years, no cracks or chips occurred from acids or bases.
borosilicate all the way.

acids and bases aren't the problem with plastics...it's nonpolars that tend to dissolve them.
solvent-plastic compatibility chart


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OfflineDr.Myco87
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Re: Chemicals reacting w/ glass jars in A/B extractions? [Re: piracetam]
    #11287474 - 10/20/09 10:41 PM (8 years, 1 month ago)

Quote:

piracetam said:
i've used the same beakers and sep funnels for 5 years, no cracks or chips occurred from acids or bases.
borosilicate all the way.

acids and bases aren't the problem with plastics...it's nonpolars that tend to dissolve them.
solvent-plastic compatibility chart




Very nice chart. Thanks. I don't know, but I've been doing STB in the same milk jug for close to a year and haven't felt it getting any thinner or anything like that. I'm going to pay attention to this more though, don't want plastics dissolving into my deemsters or Mescaline or anything that I would put into my body.


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"I don’t do drugs. I am drugs."                -Salvador Dali

"I’ve never had a problem with drugs. I’ve had problems with the police."                                          -Keith Richards

"Reality is a crutch for people who can’t cope with drugs."                                          -Lily Tomlin



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Offlineveda_sticks
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Re: Chemicals reacting w/ glass jars in A/B extractions? [Re: Dr.Myco87]
    #11290001 - 10/21/09 04:39 AM (8 years, 1 month ago)

the problems with the basified solution. water/lye solution at ph13 will certainly etch glass. Ive came across people having the same thing happen to them, either they give a jar they have been using for a while a little accidental bump and it breaks open, or the bottom just falls out with no warning.

It really depends on the glass your using. Lab grade beakers and jars should last a while, but if your using say for instance an empty jar of cheep bolignaise sauce, expect the glass to be cheap and possibly not last long.

I have 2 jars that have been sitting for almost a month, im dreading emptying them. Hopefully the glass hasnt weekend to much.

Always have vinegar on hand to clean up your spill.


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