Piroctone olamine is an organic compound used as an antimicrobial active in anti-dandruff and anti-seborrhoeic dermatitis scalp products. It is the ethanolamine salt of piroctone, a hydroxamic acid derivative. It is described as a white to slightly yellowish-white crystalline powder with a mild characteristic odour, very slightly soluble in water and freely soluble in ethanol, chloroform, and ether. It has been marketed by Clariant under the trade name Octopirox.