[curiouscat]

Just came across a coincidence that I thought I may be able to frame as a pop-trivia quiz kind of question:

Name a  chemical whose normal Melting Point (in Celcius) is the same as its Molecular Weight.

*Take "chemical" to mean element or compound. You can ignore decimals. I'm curious how many we can list. I know at least one.

And if that's too easy, then repeat the same question for "Boiling Point" instead for MP. (I don't know the answer to this one)

[mjc123]

Thallium, 204.

[sjb]

Thallium, 204.

Not sure about this one - I see various sources but around 304°C, rather than 204°C?

Not in Celsius, but a boiling point in kelvin - ⁴He?

edit for typo

[curiouscat]

The one I had in mind is an oxygenated Hydrocarbon. Quite a common one too.  I'll wait a bit more before I post the answer.

[OrganicDan96]

Benzoic acid

[billnotgatez]

Just looking up @OrganicDan96 answer

Preferred IUPAC name Benzoic acid
https://en.wikipedia.org/wiki/Benzoic_acid
Systematic IUPAC name Benzenecarboxylic acid
CAS Number 65-85-0
Chemical formula C₇H₆O₂ or C₆H₅COOH


Molar mass 122.12 g/mol
Melting point 122.41 C (252.34 F; 395.56 K)