[Fatturtle]

Been doing some test runs lately where I purge
the product down to 40 ppm residual butane and
to my surprise, the feedback I had was the product
was tasteless so I am thinking that I might not
need to purge that low. That was after 72 hours
at 29.5 hg and 105 f. The one I did for 48 hours
came back at 100 ppm.
Just wondering what are you guys thoughts on what
is the level of residual butane at wich you can start
to taste it in the product? Thanx

[troutman]

Butane taste threshold is around 300 ppm.

Even if you can't taste it. You should still try to remove as much as possible.

Check this online image.

https://image.isu.pub/160206081006-1...jpg/page_4.jpg

[SkyHighLer]

The 'taste' difference is loss of terpenes.


When a dab is vaporized the residual butane doesn't combust, it's turned to vapor along with the rest of the dab. Your nail just isn't hot enough to ignite the butane.

A residual level of 5,000 ppm is .005 of a gram of butane in a gram of BHO. A tenth of a gram dab would contain .0005 of a gram of butane. Infinitesimal. Dilute that .0005 gram of butane with air like you would when vaping a dab. Place it in a balloon, blow a full breath into the ballon, inhale the contents of the balloon. Please describe the 'taste.'


But let's say you use the BHO as a 'topper' in a pipe, still the amount of butane combusted is infinitesimal, and I suggest it is extremely likely to be undetectable by unaided senses among the other chemicals going up in smoke.

[gr0w n3rd]

I think about 350

[Gray Wolf]

Butane is a subtle odor and taste, so as noted is easily masked by the unsubtle monoterpenes. It's more detectable extracting old material mostly devoid of the competing aromatic odors and flavors.

Here is a link showing sensory thresholds for different solvents when isolated. https://cschi.cz/odour/files/world/M...g%20Method.pdf

It shows butane and propane at 1200 and 1500 PPM/VV for odor.

As a GRAS solvent with an FDA 5000 ppm residual standard, and such a high odor sensory cutoff, the issue is taste rather than toxicity and odor.

Our sense of taste is more refined, but sorting out the butane flavor from the monoterpenes below 500 ppm is a challenge for me, and our cotton candy concentrates typically test below 300 ppm after about 4 1/2 to 5 hours under vacuum at ~115F, with a couple flips.

[SkyHighLer]

Originally Posted by Gray Wolf

Butane is a subtle odor and taste, so as noted is easily masked by the unsubtle monoterpenes. It's more detectable extracting old material mostly devoid of the competing aromatic odors and flavors.

Here is a link showing sensory thresholds for different solvents when isolated. https://cschi.cz/odour/files/world/M...g%20Method.pdf

It shows butane and propane at 1200 and 1500 PPM/VV for odor.

As a GRAS solvent with an FDA 5000 ppm residual standard, and such a high odor sensory cutoff, the issue is taste rather than toxicity and odor.

Our sense of taste is more refined, but sorting out the butane flavor from the monoterpenes below 500 ppm is a challenge for me, and our cotton candy concentrates typically test below 300 ppm after about 4 1/2 to 5 hours under vacuum at ~115F, with a couple flips.

The ppm of residual solvent in an oil sample isn't equal to the ppm of residual solvent in the oil sample vaporized and diluted with air.

The residual standards are BS, at the actual concentration level the residuals are non-toxic, and undetectable to the unaided senses.

[troutman]

If you eat pizza you probably won't taste the butane until you have lots.

[Douglas.Curtis]

Originally Posted by Fatturtle

Just wondering what are you guys thoughts on what
is the level of residual butane at wich you can start
to taste it in the product? Thanx

Personally? Significantly lower than the next 1000 guys in the line. One of these days I'm going to have my tastebuds/square inch counted. lol I've only run across a couple people as sensitive as I am, and they bitch about many of the same things I do.


Definitely helps to be super sensitive, when you're working on clean product for others.

[Gray Wolf]

Originally Posted by SkyHighLer

The ppm of residual solvent in an oil sample isn't equal to the ppm of residual solvent in the oil sample vaporized and diluted with air.

The residual standards are BS, at the actual concentration level the residuals are non-toxic, and undetectable to the unaided senses.

Could you elaborate?

[HashoftheTitans]

Originally Posted by Gray Wolf

Could you elaborate?

I believe that he is saying that vaporizing a dab that is 1000ppm butane is not the same as inhaling air that is 1000ppm butane. A dab will be diluted by the air being pulled in, dropping the concentration significantly lower than that in the extract being vaporized.