Sodium 3,5,6-trichloropyridin-2-olate is the sodium salt of 3,5,6-trichloro-2-pyridinol (TCP), serving as a key intermediate in the synthesis of chlorpyrifos, a broad-spectrum organophosphate insecticide. It is primarily used in the chemical industry for manufacturing household, industrial, and agricultural insecticides effective against pests like ants, roaches, and soil-dwelling insects. While TCP itself is not an active ingredient, it enables the production of neurotoxins that disrupt insect nerve signal transmission, causing paralysis and death. The compound's stability contributes to the efficacy of formulations such as baits, gels, and sprays, with the resulting pesticides noted for low mammalian toxicity and suitability in residential and agricultural settings.