My thoughts on the odor detectability and toxicity levels of residual butane in a dab are found in this ICMAG thread entitled, “At what ppm can you taste butane?”

The odor detection tables, and FDA Q3C residual standards, along with my dilution factor calculation can also be used to determine theoretically the levels for other solvents.

The odor detection tables Gray Wolf provided are the best available at this time.

The FDA Q3C residual standards for toxicity are the USA standard at this time.

https://www.fda.gov/downloads/drugs/guidances/ucm073395.pdf

A dilution factor calculation is necessary because the residuals only come into contact with the body post vaporization.

A sample of my presentation (post #13,)

"At sea level and at 15°C air has a density of approximately 1.225 kg/m3

[url]https://en.wikipedia.org/wiki/Density_of_air[/url]

One cubic meter equals 1000 liters

[url]https://www.metric-conversions.org/volume/cubic-meters-to-liters.htm[/url]

The average total lung capacity of an adult human male is about 6 litres of air.

[url]https://en.wikipedia.org/wiki/Lung_volumes[/url]

(For convenience and to be conservative I’ll be assuming in my calculation only a single liter of dilution.)

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.

(decimal point > tenths > hundredths > thousandths > ten-thousandths > hundred- thousandths > millionths)

[url]https://www.icmag.com/ic/showpost.php?p=8160866&postcount=3[/url]

Conversion of kilograms of air to grams: 1.225kg x 1,000g/kg = 1,225g

Weight of a cubic meter of air factored to the weight of a single liter: 1,225g/m3 x m3/1,000L = 1.225g/L

Weight of a liter of air and a tenth of a gram dab: 1.225g + .1g = 1.325g

Butane residue proportion: .0005g/1.325g = .000377 = 377 ppm

A tenth of a gram dab containing a butane residue of 5,000 ppm presents only several hundred ppm of butane when consumed as intended.

The table GW provided indicates an odor threshold of 1,200 ppm for butane.

[url]https://www.icmag.com/ic/showpost.php?p=8168502&postcount=12[/url]

No odor, no toxicity."

Enjoy the spiced pecans!! (post #41)