Chloropicrin

Part of speech: noun

Definitions

1. A man-made chemical utilized in agriculture for pest control and as a warfare agent, causing irritation primarily to the respiratory tract and eyes
2. This compound acts as both an agricultural pesticide and a toxic agent in warfare, leading to significant respiratory distress and eye irritation upon exposure
3. A synthetic compound that serves dual purposes as a pesticide in farming and a chemical weapon, causing severe irritation to the eyes and respiratory system

Etymology: Chloropicrin was first made in 1848 by the Scottish chemist John Stenhouse, who produced it by reacting picric acid with bleaching powder. Its name is a blend of Greek roots: "chloro-", from "chlōros", meaning pale green, a reference to the greenish-yellow gas that chlorine, a component of the molecule, gives off, and "picrin", from "pikros", meaning bitter, from picric acid. The Greek element is a clue to the chemistry rather than a sign that the Greeks knew the substance. Its harmful properties were turned to practical use in the decades that followed. Because it is a potent lachrymator, it was used in World War I as a tear gas and as a choking agent, and it later became valued as a soil fumigant that kills fungi, nematodes, and insects before planting.