darkrom
Great Scott!
Quoting the well known Greywolf from another forum.
"OK, I picked up the test results and am still going through it a line at a time, pulling up the MSDS sheets, starting with the items of concern.
The first thing to keep in perspective, is that the total oil was 12 ppm from 21.3 liters, so the PPM in the study should be divided by 1,000,000 and multiplied by .000,012, to get the concentration.
That concentration number X 1,000,000 will give you parts per millionth.
In summary, there were simple Alkanes present as long as C-16, which are not of health concern at the levels present.
In addition there are aromatic Alkenes present, that are of serious concern, but not at levels remotely close to exposure limits.
The concern with those Alkenes is really not reaching toxic limits, but the fact that some are known carcinogens, mutagens, teratogens, etc.
IE: Cyclohexane, isocyanato, which most likely came from the gaskets and seals used in the cans and process, because it isn't found naturally in butane.
Nasty bad shit, with an no exposure limits established and an intravenous LD-50 mouse of 13 ppm and present at the level of .000000001728 concentration, or .001728 parts per millionth. That is about 7500 times lower than the LD-50.
Another bad nasty present was Benzenamine, 3,5, at the levels of .035778 parts per millionth, with a Permissible Exposure Limit of 2 ppm TWA for 8 hours. That is only 56 times lower than PEL, so of more concern.
Benzene 1,1 showed up at a concentration of .000000003678, or .000003678 PPM, with a Permissible Exposure Limit of 110 ppm TWA 8 hours.
I could go on, but it will take me awhile to pull MSDS sheets for the whole list, so I've attached the raw data. Sorry the quality isn't better, but the original is barely readable and this was copied at 1200 bit resolution
Even if nothing is present at levels of serious health concern, I would prefer to not have any of that stuff in there, so in addition to fractional distillation using vacuum, we will be experimenting with Bentonite filters."
I will gladly update this with a direct link to the other forum if I have permission to do that. I view this as a serious matter.
Personally I'll be finishing the BHO I have, running my last can, then reconsidering if I want to do BHO runs anymore or just stick to bubble. I'm FAR FAR from anti-bho, but this may mean I become anti-canned butane BHO. In a cloosed loop system this is a non-issue, so dispensaries making things the proper way are as safe as ever, but the fact is canned butane seems to be a no-no for those of us concerned about what we are vaporizing. Not trying to cause panic because it is in INCREDIBLY low concentrations that are unlikely to cause issues, but I would still rather avoid known toxins. CLOSED LOOP is the way to go at this point.
"OK, I picked up the test results and am still going through it a line at a time, pulling up the MSDS sheets, starting with the items of concern.
The first thing to keep in perspective, is that the total oil was 12 ppm from 21.3 liters, so the PPM in the study should be divided by 1,000,000 and multiplied by .000,012, to get the concentration.
That concentration number X 1,000,000 will give you parts per millionth.
In summary, there were simple Alkanes present as long as C-16, which are not of health concern at the levels present.
In addition there are aromatic Alkenes present, that are of serious concern, but not at levels remotely close to exposure limits.
The concern with those Alkenes is really not reaching toxic limits, but the fact that some are known carcinogens, mutagens, teratogens, etc.
IE: Cyclohexane, isocyanato, which most likely came from the gaskets and seals used in the cans and process, because it isn't found naturally in butane.
Nasty bad shit, with an no exposure limits established and an intravenous LD-50 mouse of 13 ppm and present at the level of .000000001728 concentration, or .001728 parts per millionth. That is about 7500 times lower than the LD-50.
Another bad nasty present was Benzenamine, 3,5, at the levels of .035778 parts per millionth, with a Permissible Exposure Limit of 2 ppm TWA for 8 hours. That is only 56 times lower than PEL, so of more concern.
Benzene 1,1 showed up at a concentration of .000000003678, or .000003678 PPM, with a Permissible Exposure Limit of 110 ppm TWA 8 hours.
I could go on, but it will take me awhile to pull MSDS sheets for the whole list, so I've attached the raw data. Sorry the quality isn't better, but the original is barely readable and this was copied at 1200 bit resolution
Even if nothing is present at levels of serious health concern, I would prefer to not have any of that stuff in there, so in addition to fractional distillation using vacuum, we will be experimenting with Bentonite filters."
I will gladly update this with a direct link to the other forum if I have permission to do that. I view this as a serious matter.
Personally I'll be finishing the BHO I have, running my last can, then reconsidering if I want to do BHO runs anymore or just stick to bubble. I'm FAR FAR from anti-bho, but this may mean I become anti-canned butane BHO. In a cloosed loop system this is a non-issue, so dispensaries making things the proper way are as safe as ever, but the fact is canned butane seems to be a no-no for those of us concerned about what we are vaporizing. Not trying to cause panic because it is in INCREDIBLY low concentrations that are unlikely to cause issues, but I would still rather avoid known toxins. CLOSED LOOP is the way to go at this point.
