Skatole or 3-methyl indole is a mildly toxic white crystalline organic compound with chemical formula ₉ and CAS number 83-34-1. It occurs naturally in feces, beets, and coal tar, and has a strong fecal odor. In low concentrations it has a flowery smell and is found in several essential oils, including those in orange blossoms and jasmine. It is therefore used as a fragrance in many perfumes.

Its name is derived from skat, the Greek word for dung.

See also

• indole
• methyl
• 1-methyl indole
• 5-methyl indole
• 7-methyl indole
• methylketol