Amazing what you find while crawling around web pages.

US Government Standard bathroom malodor was originally developed to test air fresheners and extractors but is now formulated as a crowd dispersal substance :

The Guinness Book of Records lists two smelliest substances. One is “US Government Standard Bathroom Malodor”; a mixture of eight chemicals with a stench resembling human feces, only much stronger.

Sounds delightful doesn’t it?

And, if you were thinking of knocking some up (preferably in someone else’s kitchen) :

Standard bathroom malodor

The US Government Standard Bathroom Malodor is quoted to have this composition:

Dipropylene glycol	62.82%
Skatole	0.91%
2-naphthalenethiol	0.91%
Thioglycolic acid	21.18%
Hexanoic acid	6.00%
p-cresyl isovalerate	2.18%
N-methyl morpholine	6.00%

Expect The Met to start bathrooming rather than kettling any time soon.

Yes, the title spelling is US but it is also its name.