What is the True boiling point of THC?

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If you’re looking for the most comprehensive information on the boiling point of THC, you have come to the right place! We’ve assembled all the most respected sources and studies to provide an accurate depiction of the various boiling points of THC molecules. First off, there are three distinctly different types of THC molecules.

THCΔ-9-tetrahydrocannabinol boiling point is 314.6F (157C)

THCV – tetrahydrocannabivarin boiling point is 428F (220C)

Δ-8-THCΔ-8-tetrahydrocannabinol boiling point is 347-352.4F (175-178C)

Articles like this one from High Times – “What is the Real Boiling Point Of THC” – clearly get these variations confused, although their research into sources is sound. For example:

“I have seen conflicting reports about the vaporization point of THC,” says Dale Gieringer, PhD. Specifically, the Wikipedia page for THC says the boiling point for THC is 315 °F, and cites this article called Cannabis and Cannabis Extracts: Greater than the Sum of Their Parts? by John M. McPartland and Ethan B. Russo as a source for that number. That article includes a table with the boiling points of seven cannabinoids and cites three different primary sources for those values.

On the one hand you might think the boiling point of THC is 315 °F, but other sources list a different value. Pubchem, an online database of chemical compounds lists the boiling point of THC as 392 °F at 0.02 mm of Hg (a low pressure). Pubchem cites the National Toxicology Program (NTP) as their source. Looking deeper, we see on page 13 of the NTP’s report on THC lists the boiling point as 200 °C, or 392 °F. There’s one catch to this number though, it’s listed as the boiling point of THC at 0.02 mm Hg, meaning 392 °F is the boiling point of THC under a pressure that’s almost a vacuum.

Here’s a quick reminder from high school chemistry class: boiling points are always lower at lower pressures. According to an article by Dale Gieringer called Marijuana Water Pipe and Vaporizer Study, “the vaporization point at normal atmospheric pressure appears to be unknown, but is thought to be in the range 250-400º.”

So where lies the final verdict on the boiling point (a.k.a. vaporization point) of THC? We don’t know, but it’s definitely higher than 315 °F, and probably ever higher than 392 °F. This isn’t to say that cannabinoids won’t start to vaporize at temperatures as low as 300 °F, but other factors are at play in this scenario. Some people may prefer the taste and milder experience of low-temp vaporizing and low-temp dabbing, but those who want a higher yield on their product should definitely aim for a higher temperature.”

 

Clearly it depends on which type of THC chemical, and that displays the highest rate of variation in boiling points.

A more accurate source, which has used the reddit community to further eliminate inconsistencies, is VaporizerTemp.com’s chart found here.

Other sources:
http://www.cannabis-med.org/data/pdf/2001-03-04-7.pdf
http://www.canorml.org/healthfacts/vaporizerstudy1.html
http://www.weedist.com/2012/07/tailoring-high-compounds-in-cannabis-properties-boiling-points/
http://thewercshop.com/services/terpene-profiling-services/
http://forum.grasscity.com/apprentice-tokers/1097104-max-efficiency-guide-dont-waste-any-more-weed.html
http://www.hightimes.com/read/what-real-boiling-point-thc

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