Thapsic acid (hexadecanedioic acid) is a naturally occurring dicarboxylic acid with the formula C16H30O4.

The name is derived from Thapsia, the Latin name for a Mediterranean perennial whose roots contain thapsic acid.

[citation needed] It has a role as a human metabolite.

[1] It is the conjugate acid of hexadecanedioate.

This article about an organic compound is a stub.