DMT-Nexus member
Posts: 247 Joined: 09-Aug-2014 Last visit: 19-Feb-2021
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Bestine FTW!
Who here likes to use naphtha over heptane and why?
I'm under the assumption hept pulls less fats and oils and evaporates faster.
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analytical chemist
   
Posts: 7463 Joined: 21-May-2008 Last visit: 09-Aug-2025 Location: the lab
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Sandgrease wrote:Bestine FTW!
Who here likes to use naphtha over heptane and why?
I'm under the assumption hept pulls less fats and oils and evaporates faster. naphtha is more cost-effective. heptane is typically reserved for recrystallizations. "Nothing is true, everything is permitted." ~ hassan i sabbah
"Experiments are the only means of attaining knowledge at our disposal. The rest is poetry, imagination." -Max Planck
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DMT-Nexus member
Posts: 112 Joined: 09-Oct-2014 Last visit: 08-Sep-2023 Location: here and now
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Naphtha is a mix of different hydrocarbons (including heptane). So it will naturally pull a wider range of things.
I like the wider range though. That and naphtha is so widely/cheaply available where I live.
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DMT-Nexus member
Posts: 1892 Joined: 05-Oct-2010 Last visit: 02-Oct-2024
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I've seen no difference at all between hexane and heptane in extractions or recrystallizations, and have seen both at a lower price than light naptha. Art Van D'lay wrote:Smoalk. It. And. See.
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DMT-Nexus member
Posts: 989 Joined: 27-Dec-2014 Last visit: 17-Feb-2024
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I'll just stick with naphtha, around my parts it's cheaper, and I like the broad range during extraction too. Evap isn't an issue as I don't do that method cause I can't.
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DMT-Nexus member
Posts: 36 Joined: 05-Apr-2013 Last visit: 15-Nov-2017
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Orion wrote:I've seen no difference at all between hexane and heptane in extractions or recrystallizations, and have seen both at a lower price than light naptha. in my area hexane is a quarter of the price of naptha
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Communications-Security Analyst
Posts: 1280 Joined: 17-Aug-2014 Last visit: 05-Feb-2024 Location: Nirvana
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You could of course, use more than 1 solvent type during an extraction.
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DMT-Nexus member
Posts: 247 Joined: 09-Aug-2014 Last visit: 19-Feb-2021
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I worry about using anything other than Bestine because of quality issue with naphtha. I just don't trust some of this stuff. I'd probably get goo if I used naphtha on ACRB anyway.
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analytical chemist
Posts: 7463 Joined: 21-May-2008 Last visit: 09-Aug-2025 Location: the lab
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I get residue when I use dcm on mhrb, but all that means is it's an effective solvent that pulls different alks. there's no way heptane is more effective at pulling than dcm. I use heptane to resolve the residue to crystals. "Nothing is true, everything is permitted." ~ hassan i sabbah
"Experiments are the only means of attaining knowledge at our disposal. The rest is poetry, imagination." -Max Planck
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Communications-Security Analyst
Posts: 1280 Joined: 17-Aug-2014 Last visit: 05-Feb-2024 Location: Nirvana
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benzyme wrote:I get residue when I use dcm on mhrb, but all that means is it's an effective solvent that pulls different alks.
there's no way heptane is more effective at pulling than dcm.
I use heptane to resolve the residue to crystals.
Precisely! Solvents are merely different tools for different jobs. There's no harm in using a different solvent for different stages of the extraction. Especially when it does most of the purification for you.
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DMT-Nexus member
Posts: 989 Joined: 27-Dec-2014 Last visit: 17-Feb-2024
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Well said benzyme and 1ce, I'll stick with naphtha for the general extraction and heptane for growing pretty xtals. 
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Boundary condition
Posts: 8617 Joined: 30-Aug-2008 Last visit: 07-Nov-2024 Location: square root of minus one
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shakan27 wrote:Orion wrote:I've seen no difference at all between hexane and heptane in extractions or recrystallizations, and have seen both at a lower price than light naptha. in my area hexane is a quarter of the price of naptha Hexane is an insidious neurotoxin and best avoided. “There is a way of manipulating matter and energy so as to produce what modern scientists call 'a field of force'. The field acts on the observer and puts him in a privileged position vis-à-vis the universe. From this position he has access to the realities which are ordinarily hidden from us by time and space, matter and energy. This is what we call the Great Work." ― Jacques Bergier, quoting Fulcanelli
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Communications-Security Analyst
Posts: 1280 Joined: 17-Aug-2014 Last visit: 05-Feb-2024 Location: Nirvana
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downwardsfromzero wrote:shakan27 wrote:Orion wrote:I've seen no difference at all between hexane and heptane in extractions or recrystallizations, and have seen both at a lower price than light naptha. in my area hexane is a quarter of the price of naptha Hexane is an insidious neurotoxin and best avoided. That's overwhelmingly hilarious considering you were just propagating the use of diethyl ether! hexanes msdsYup, how nasty it would be if you ingested 50g hexane orally. Or took a bath in it. Didn't I just see you propagating the use if diethyl ether in-home? Why is it every time I see you post you're either trying to incite something, or you are spewing dangerous/bad information? I'd perish the habbit out of self interest if I were you.
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Boundary condition
Posts: 8617 Joined: 30-Aug-2008 Last visit: 07-Nov-2024 Location: square root of minus one
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I sadly fear you're exaggerating... Also, short term and long term toxicity are slightly different things. I hope you use a fume cabinet. “There is a way of manipulating matter and energy so as to produce what modern scientists call 'a field of force'. The field acts on the observer and puts him in a privileged position vis-à-vis the universe. From this position he has access to the realities which are ordinarily hidden from us by time and space, matter and energy. This is what we call the Great Work." ― Jacques Bergier, quoting Fulcanelli
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