Chlorpyrifos

**Semantic type:** Pharmacologic Substance

**Definition:** A synthetic organophosphate acetylcholinesterase inhibitor, reproduction toxicant, and neurotoxicant that is used as a pesticide. It is characterized as a highly toxic colorless, white, or light brown crystalline solid with a mild rotten egg odor, and exposure occurs by inhalation, ingestion, or contact.

**Synonyms:** - CHLORPYRIFOS - CHLORPYRIFOS