1H-indole is an indole and a polycyclic heteroarene. It has a role as an Escherichia coli metabolite. It is a tautomer of a 3H-indole

It can be widely used in floral fragrances such as jasmine, lilac, neroli, gardenia, honeysuckle, lotus, narcissus, ylang-ylang, freesia, and white orchid.Traces can be used in chocolate, raspberry, strawberry, bitter orange, coffee, nut, cheese, grape and fruit complex flavors.