Trans-2-pentene is a chemical compound with the formula C5H10, characterized by a double bond between the 2nd and 3rd carbon atoms, with trans configuration of methyl and ethyl groups. It serves as a polymerization inhibitor and is used in the production of petroleum resins and amyl alcohols. While its toxicological properties are not fully understood, inhalation of its vapors can irritate the respiratory system, causing symptoms like coughing and shortness of breath. Environmental concerns include its potential toxicity to aquatic life, particularly in lakes, which could harm fish populations. Understanding these aspects is crucial for addressing both health and environmental impacts.