Domestic Butane

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Medical extractors looking for a domestic source of 99.5% Instrument grade n-Butane will be gladdened by the latest gas supplier to announce a domestic source at competitive prices, replete with Praxair tests and certifications.   99.99% scheduled next.

You have to buy to own your first LP5 (24lb) or FX1 (120lb) tank, and then continue to swap it out.

Contact J Coltrane for pricing and delivery, at


We sent a sample of  Coltrane/Praxair 99.5% Instrument Grade n-Butane to a third party analytical lab to determine the contaminant levels of molecules larger than C-4, ignoring molecules smaller than C-4 because they are not of concern to us for our process.

The lab determined that the parts per million contamination was below their test cut off of 0.2 ppm, so this information was minimally useful.

We subsequently distilled off 10# of it into a new Lp-5 tank, and passed it through a VICI Metronics polishing filter.  We noted that after distilling 10# in a 12″ X 12″ recovery pot, that there was only a light film on the inside of the pot, with no droplets or puddles.  Sadly, the weight of the oil would be minuscule compared to the weight of the cold trap, so simple weighing is not possible, so we will again rely on a state certified third party forensic lab.

Dropping those off this morning and this time, we will have the remaining virgin n-Butane analyzed using a GCMS to the PPB level, and test the distilled and polished butane to glean empirical results on the efficacy of our process.



13 responses to this post.

  1. Posted by Humboldt science on September 1, 2015 at 6:07 PM

    Hey gw! Have one of the automated mkv systems..was curious what brand are the temp probes in the system??


  2. Posted by Alex on August 23, 2015 at 3:51 PM

    Also, I remember in one of your past posts your recommend an excellent book regarding perfumes, frgrances, and hydrocarbon extraction? I beileve it was written by a French author?

    Would love to order it!

    Thanks buddy!


  3. Posted by Alex on August 23, 2015 at 3:43 PM

    Hey bud, which VICI Metronics polishing filter do you use to filter your gas? I notice they are different models for different gasses


  4. Posted by Eric on August 23, 2015 at 10:13 AM

    I just wanted to say that J Coltrane has been a great person to work with. We had to special order some tanks which took some time. However, the prices were fair, the quality high, and the service/response time was really quick. I think he responded to my original email within an hour. Lastly, he seems to have the same open source mentality as Grey Wolf which I personally really really appreciate. Thanks to both J and GW!


  5. Posted by ChefJGC on April 10, 2015 at 4:49 PM

    Thank You Skunk Pharm, for your dedication, time, information, insight & humor.
    Job Well Done!!! I simply can’t say enough about the safe information you supply.
    Any info on butter extraction?


  6. Posted by dee on March 25, 2015 at 7:50 AM

    I have a 120lb tank. Northern California. quote please?


  7. Alternatively, You Can Buy CapitalButane’s N-Blend, Puretane’s N-Butane and More at Bulk,Wholesale Prices with Free US Shipping #BHO #PHO


    • You tried, but your brands, Capital, and the new Puretane, turned out to be losers upon my recent retest for non-volatile residue, i.e., Mystery Oil. Also, Nxxt2Zero wasn’t so great for an English butane. Sorry… all I can say is, do my test! That’s the entire answer to this entire dilemma, for all the participants. I’m thinking of becoming a vendor of canned butane myself or with a partner, “SkyHighLer’s word that every lot that leaves my warehouse passes test.”
      Only the best of the canned brands and bulk supplies, and then I test a sample by date code of every lot with my simple test. Here’s a link to my Best to Worst Canned Butane List, there you’ll find a link to the raw unordered entries, and at the bottom of that page is how to do my simple test, it should be as basic to everyone as a nickel’s five grams.


    • Please be sure and predistill it, as we recommend for all butane sources.


  8. Posted by Lance Teo on February 25, 2015 at 9:05 PM



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