The Rules

Here at chemistry-blog we feel the need for a sacred text setting out the etiquette to be followed by chemicals scientists everywhere.

Henceforth these shall be known as The Rules (an idea blatantly stolen for cyclists), and they shall set us apart from those that peddle particles or organisms.

The Rules have been distilled from precedents and consensus. However more may be required.

1) There is ONE periodic table. Do not tolerate poor imitations of Mendeleev’s genesis.

The ‘periodic’ tables of Muppets, Harry Potter, cocktails etc. are not periodic hence they are just tables.

2) DNA is a right handed helix. Should you see it depicted otherwise you must bring it to the attention of twitter immediately.

Amendment: Dear Reddit, yes I know Z-DNA is left handed and if the news outlet using the image has labelled it as such then you don’t have to inform twitter. Okay?

3) The rubber balloon was invented by Michael Faraday, it is therefore a perfectly acceptable piece of laboratory equipment. 

To avoid the embarrassment and bother of having to buy balloons form the party shop all chemistry departments/companies should stock them in their stores, where they shall be known as Faraday spheres.

4) Acceptable uses of liquid nitrogen include making ice cream.

5) Always wear your safety specs in the lab. Do not wear them (even on your head) in seminars, at lunch or wondering around campus.

An exception is made when you have a nice pair of wrap around specs and can’t find your cycling glasses, thus allowing you to adhere to cycling rule #39 whilst circumventing rule #36.

6) Do not use the phrase ‘chemical-free‘, ‘no chemicals‘ or similar, EVER!

Except of course when ridiculing those that do.

7) It never gets easier, yields just get better. 

8)  Chief Editors of Nature Chemistry are bestowed with the honour of being verbed.

9) Lab coats should be white.

Maybe you think that wondering into the lab looking like something from an Andrew Lloyd Webber musical makes you stand out from the crowd. It does, but not in a good way.

The only the exception is in undergraduate lab classes where it is acceptable for instructors and demonstrators to wear a splash of colour to distinguish them from the hoi polloi.

Amendment: Blue nomex coats are OK, but ONLY when you really need one.

10)  Zinc and cadmium are not transition metals. Keep up.

11) When taking part in a photo op do not don a lab coat and sit at the bench unless this is where you work.

If you have the title ‘Professor’ no-one believes that the lab is were you spend your day and frankly you look a bit awkward in your pristine coat, perched before a piece of equipment that you can’t remember how to use.

12) The journal PNAS is pronounced as you would expect. Stop trying to to pretend otherwise.

13) Sulfur is not spelt with ‘ph’ no matter which side of the Atlantic you are on.

14) Helium is for NMR instruments, stop putting it in Faraday spheres

15) Before you waste an afternoon in the library be sure to spend a month or two in the lab re-discovering something that’s already been published. 1

16) The structures in your graphical abstract are not to be arbitrarily coloured in, no matter how pretty it looks. 2

17) If you book the instrument USE the instrument.3

The booking calendar is not for letting everyone know when you think you might use the instrument unless something else comes up, like grabbing a coffee or writing an inane blog post.

18)  Clean out the god damn pump trap.4

It is not a place to conduct an unregulated experiment.

Contribute to The Rules through comments or twitter via the hashtag #ChemRules and together we’ll build our code of behaviour.

19) Always wash your hands BEFORE going to he bathroom.5

This also applies if you’ve been cooking with chile peppers.

20) Your lab coat is NOT a rain coat.

21) Increased blood ethanol (to a concentration of 5.4mM) should be the reward for popping into the lab on a weekend or evening at the behest of a colleague who lives a greater distance from the lab than you.

Substituting caffeine for ethanol is permissible.

22) British queuing rules apply to the use of ALL laboratory equipment. No exceptions!

Not even if your sample, degrades or decays quickly.

23) Columns and reactions have improved yields if serenaded.  7 

“You can’t always get what you want” works particularly well. Be sure to include details in your methods.


1 Courtesy of Cantrill (the noun not the verb). 

2 Good point, thanks Fluorogrol.

Well said Chad.

Thank you Alex.

5  A excellent rule suggested by a Rabbit on Redit.

 @canageek, very true.

Thank you Luke and Alex.



  1. Dangerous Bill says:

    When I wear my safety goggles outside the lab, the chicks flock to me. They can’t help themselves. Now you’re telling me I can’t do that? Is it because it’s unfair to nonchemist males?

    • That is certainly one of the reasons, we have a bad enough image problem as it is without having to deal with the jealousy of non-chemists.

  2. For every polyurethane reaction, there is an equal but faster polyurea reaction

  3. 19) Don’t store your 200 mg product in the freezer in a 2 L flask…

  4. “Zinc and cadmium are not transition metals. Keep up.”

    Why not mercury?

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