Picardin

Picardin is a chemical compound with the IUPAC name 2-(1-hydroxyethyl)piperidine. It is a colorless to pale yellow liquid that is soluble in water and organic solvents. Picardin is primarily known for its use as an insect repellent.

It was developed by the United States Army in the 1940s and 1950s as a potential replacement for DEET. While developed concurrently with DEET, it was not widely commercialized until later. Picardin is synthesized from piperidine, a cyclic amine.

Picardin works by interfering with the olfactory receptors of insects, making it difficult for them to locate their hosts. It is effective against a wide range of biting insects, including mosquitoes, ticks, fleas, and biting flies. The duration of protection offered by picardin can vary depending on the concentration and environmental factors, but it generally provides several hours of repellency.

Products containing picardin are available in various formulations, such as lotions, sprays, and wipes. It is considered to be a safe and effective insect repellent when used as directed. Its low toxicity and pleasant cosmetic properties, such as being non-greasy and having little odor, have contributed to its popularity. Regulatory agencies worldwide have approved its use in insect repellent products.