Hydrogen: 0-50% (flammable)
Carbon dioxide: 10-30%
Methane: 0-10% (flammable)
Lighting Farts on Fire - The Blue FlameHuman flatus may contain hydrogen gas and/or methane, which are flammable. If sufficient amounts of these gases are present, it's possible to light the fart on fire. Keep in mind, not all farts are flammable. Although flatus has great YouTube fame for producing a blue flame, it turns out only about half of people have the archaea (bacteria) in their bodies that are necessary to produce methane. If you don't make methane, you may still be able to ignite your farts (a dangerous practice!), but the flame will be yellow or possibly orange rather than blue.
The Smell of FartsFlatus often stinks! There are several chemicals that contribute to the smell of farts:
- skatole (by-product of meat digestion)
- indole (by-product of meat digestion)
- methanethiol (a sulfur compound)
- dimethyl sulfide (a sulfur compound)
- hydrogen sulfide (rotten egg odor, flammable)
- volatile amines
- short chain fatty acids
- feces (if present in the rectum)
Got questions or comments? Feel free to post a response.