# What is the boiling point of THC at 1 atm?

**URL:** <https://boards.straightdope.com/t/what-is-the-boiling-point-of-thc-at-1-atm/826431>\
**Category:** Factual Questions\
**Created:** [December 20, 2018, 5:22pm UTC](https://boards.straightdope.com/t/what-is-the-boiling-point-of-thc-at-1-atm/826431 "2018-12-20T17:22:42Z")\
**Posts on this page:** 4\
**Page:** 2

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**Author:** ![DPRK](https://avatars.discourse-cdn.com/v4/letter/d/4491bb/32.png) [@DPRK](https://boards.straightdope.com/u/DPRK)\
**Post date:** [December 21, 2018, 6:02am UTC](https://boards.straightdope.com/t/what-is-the-boiling-point-of-thc-at-1-atm/826431/21 "2018-12-21T06:02:02Z")

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> [@jackdavinci](#):
>
> I think what’s really being asked is, how do recreational vaporizers determine the proper temperature to use for a particular chemical? To avoid legal issues we can discuss what attribute of nicotine is used and extrapolate from there.

But why? Doing drugs may be illegal due to Prohibition, but scientific research is not.

[Here](https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5733806/) is one experiment involving two different cannabinoids. The enthalpy of vaporization depends on temperature and so on, but what we care about is Table 2 where the vapor pressure is actually measured. At 100 °C it is approximately 0.1 Pa, for example. The predicted boiling point is 417.2.

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**Author:** ![purplehorseshoe](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/purplehorseshoe/32/2996_2.png) [@purplehorseshoe](https://boards.straightdope.com/u/purplehorseshoe)\
**Post date:** [December 21, 2018, 8:04am UTC](https://boards.straightdope.com/t/what-is-the-boiling-point-of-thc-at-1-atm/826431/22 "2018-12-21T08:04:59Z")

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Anyone else amused that the answer appears to be in the neighborhood of 420 (degrees) ?

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**Author:** ![am77494](https://avatars.discourse-cdn.com/v4/letter/a/d2c977/32.png) [@am77494](https://boards.straightdope.com/u/am77494)\
**Post date:** [December 21, 2018, 3:18pm UTC](https://boards.straightdope.com/t/what-is-the-boiling-point-of-thc-at-1-atm/826431/23 "2018-12-21T15:18:23Z")

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This site lists the boiling temperature to be 862 K or 1093 F or 589 C.

> **[Tetrahydrocannabinol.pdf](https://www.chemeo.com/cid/87-150-9/Tetrahydrocannabinol.pdf)**

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**Author:** ![DPRK](https://avatars.discourse-cdn.com/v4/letter/d/4491bb/32.png) [@DPRK](https://boards.straightdope.com/u/DPRK)\
**Post date:** [December 21, 2018, 3:39pm UTC](https://boards.straightdope.com/t/what-is-the-boiling-point-of-thc-at-1-atm/826431/24 "2018-12-21T15:39:17Z")

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> [@am77494](#):
>
> This site lists the boiling temperature to be 862 K or 1093 F or 589 C.

Sounds like the same Joback group-contribution method mentioned in the previous link, where they suggest it is an overestimate.

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