2373: Chemist Eggs

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Chemist Eggs

Title text: Chemists actually find it simpler to define a general odor of rotten eggs as a baseline, and the LACK of rotten eggs as a distinct smell.

Explanation

This explanation may be incomplete or incorrect: Created by a HOUSE FULL OF EGGS. Please mention here why this explanation isn't complete. Do NOT delete this tag too soon. If you can address this issue, please edit the page! Thanks.

This comic details how some people attribute smells to certain things that aren't always common to smell. This seems like it could be Randall's reaction to people taking scientists stating simple facts as the end-all-be-all solution or situation that the world is facing. Cueball's excessive reactions appear to have made Ponytail so disgusted that she is clenching her fists in anger as she leaves the conversation, presumably to avoid further irritation.

Transcript

This transcript is incomplete. Please help editing it! Thanks.

[Cueball and Ponytail face a table with a machine on it.]

Cueball: How will I know if the reaction fails?

Ponytail: You'll smell the sulfides.

Cueball: What do those smell like?

Ponytail: Sulfurous. Rotten eggs.

[A new panel, the table is gone. Cueball is now facing Ponytail.]

Cueball: Chemists always compare sulfur to rotten eggs.

But why would I know that smell?

Ponytail: I dunno, It's a common thing!

[Ponytail puts her hand out.]

Cueball: Is it? My kitchen is messy, but there aren't eggs lying around rotting.

Ponytail: You must have smelled one at some point.

[Ponytail is now walking right off-panel, away from Cueball. She is clenching her hands and is evidently annoyed]

Cueball: Are all chemists' houses full of random raw eggs? Do you toss them over your shoulder for good luck?

Ponytail: My house is not full of eggs!

Cueball: What do you consider a normal amount of eggs in a house?

Cueball: If kids egg your house this Halloween, how will you know?

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Discussion

Chemists get another solid pummeling from xkcd dot com. Also, double question marks, very Ryan North. Lightcaller (talk) 00:41, 17 October 2020 (UTC)

Well they are just Stamp collectors high on methylacetylate. Kev (talk) 16:15, 17 October 2020 (UTC)

You could disguise the smell of your rotten eggs with selenophenol and thioacetones. Nobody will complain about your mere sulphides then... (ETA: I wonder about selenoacetones?)162.158.154.167 00:53, 17 October 2020 (UTC)

Seperately, I recall the time when I was still at school and we'd made some compound that had produced the distinct smell of almonds. Mentioning this later to my father (a chemist himself) he was initially quite concerned before I clarified whatever-it-was as whatever it actually was and not an actual cyanogen compound. 141.101.107.82 01:03, 17 October 2020 (UTC)

About that whole almonds and cyanide thing, wild almonds were originally what are typically called "bitter almonds" which have some substantial differences from the "sweet almonds" you usually see (bitter almonds aren't normally sold in the US at all). Thing is, they contain a chemical that when it reacts with water produces hydrogen cyanide (very little of this is in sweet almonds), to the point where eating enough (depending on your weight, possibly as few as a dozen) could produce a lethal dose of cyanide. However this breaks down when cooked, so they are only dangerous raw. It is these bitter almonds that smell somewhat like cyanide in other contexts might, and is quite unlike the normal smell of sweet almonds (though it isn't quite the same as other sources of cyanide, but resembles it much more than whatever almonds you've most likely encountered). Oddly enough, the smell of bitter almonds isn't from the hydrogen cyanide, but another substance the same thing breaks down into called benzaldehyde (which is also poisonous.)--162.158.75.160 09:31, 17 October 2020 (UTC)

I always heave a mental sigh when I see some bit of safety literature informing me that natural gas smells like rotten eggs. First, as Randall points out, that's not a very useful explanation for most people. Second, it isn't the natural gas (i.e. methane) that has that odour, but the thiols that are added to it as a safety feature. BunsenH (talk) 02:42, 17 October 2020 (UTC)

Pretty sure the current version explanation is wildly overthinking this - sometimes a cigar is just a cigar, and sometimes a comic about how weird it is that we reference things smelling like rotten eggs when they’re uncommon is just that. 172.69.34.28 05:17, 17 October 2020 (UTC)

That was my first impression, too... Elektrizikekswerk (talk) 12:32, 19 October 2020 (UTC)

Actually, sulphides (H2S in particular) smell more like farts that rotten eggs. But science teachers know that if they use the word "fart" in front of a class, there will be no more work done in that lesson, and probably none by that class.

The kids recognise the smell, of course. We used to call it "fartrogen dioxide". Paul Seed 07:43, 17 October 2020 (UTC)

I read that the principal components of flatus ("fart gas") are methyl mercaptan, dimethyl sulfide, and hydrogen sulfide, leading to [ahem] a complex cocktail of odors. https://en.wikipedia.org/wiki/Flatulence#Production,_composition,_and_smell

The header got renamed, here is the updated link pinned to the current version: Production, composition, and odor

There was a time, before refrigeration or stock rotation, when bad eggs were much more common. Hence the story of the Curate's egg [1], updated here [2]

The Halloween reference could use an explanation. I don't live in the US (or wherever Halloween tradition lives), and connection to eggs is not clear to me. 162.158.183.152 08:21, 17 October 2020 (UTC)

Kids sometimes throw raw eggs at houses on Halloween just to annoy people. That is all. 172.69.35.31 08:37, 17 October 2020 (UTC)

Rotten eggs were a common feature of the household that had free-range chickens and small children. The hens would lay their eggs in whatever spot pleased them, rather than just in the hen house. Children sent out to collect eggs would delight in finding eggs that had lain hidden for weeks and bring them in to the kitchen where Mother would carefully crack eggs separately, as mentioned in the explanation. Snezzy (talk) 11:42, 17 October 2020 (UTC)

I think that everyone could find egg which was hidden longer than expected, not just small children. Also, the ratio of households with children didn't changed much, while the ratio of households with free-range chickens dropped massively. -- Hkmaly (talk) 01:42, 18 October 2020 (UTC)

I think that the section at the top seems to fit more in trivia rather than directly as a comic explanation because it doesn't really explain the comic 108.162.212.29 14:16, 17 October 2020 (UTC)Anonymous

Anecdote, and not hydrogen sulfide or (primarily) smell, but related: Scene - a chemistry class being taught by ill-prepared/scatty teacher. Instructions to the class being read out from a book from the front. Flasks on the tripods on desks, ready for the next bit, which was apparently something like "add 2cc of bromine"... Duly added by all the class. Turns page ..."water.". Too much! Boil off a little everybody! Boiling off creates carpet of brown fumes roiling across the floor. Question from a pupil - isn't bromine poisonous? Yes, yes! Deadly (sic) poison! Evacuate the class! - Which, because it was on the top floor and the brown mist was now out of the door and flowing down the stairs meant a far more thorough evacuation of the entire building...

Further anecdote, less related, was when nitration of toluene went a bit far. Instead of being creamy-yellow it was white (or vice-versa - I forget which), so it wasn't nitrotoluene any more. Apparently there was an area in the school fields where they buried (or at least saved for possible later analysis) such things as test-tubes of suspected trinitrotoluene, to which this was (gently!) whisked away. 162.158.154.215 10:26, 20 October 2020 (UTC)

So then, what does sulfur smell like, if not rotten eggs? What's a better descriptor? 162.158.78.198 02:03, 21 October 2020 (UTC)

Farts. Unlike rotten eggs, most students will have encountered these. And, depending on their diet, it may even be accurate. 162.158.38.22 21:41, 27 October 2020 (UTC)

You don't need to encounter rotten eggs to figure out the smell, any stale egg dish will do. Like an omelette that's been sitting out for just too long.Xurkitree10 (talk) 11:17, 2 January 2023 (UTC)