Chemistry humour survives better than most subject-specific joking because so much of it is built into the vocabulary. Element symbols spell words, compound names sound like insults, and the field is full of terms that were coined before anyone worried how they would read aloud. A joke that depends on a name rather than on a fact does not go out of date when the fact is revised.
The other half of the genre is safety culture, retold as comedy: the reagent nobody wants to be near, the reaction that is only demonstrated outdoors, the label that understates its contents. Those jokes work in any lab in any decade, which is why they keep being recirculated in new formats. This entry is kept as part of the image archive.