- trans-2-Butene-1-thiol (commonly referred to as butyl mercaptan)
- 3-Methyl-1-butanethiol
- 2-Methyl-2-butanethiol
- sec-Butyl mercaptan
- Ethyl mercaptan
These sulfur-containing compounds create an intensely unpleasant, pungent odor that can be described as pungent, musky, pungent, gas-like, or even acrid. The concentration and ratio of these compounds can vary between individual skunks, influencing the potency and exact nature of the odor.