RT Book, Section A1 Shawn, Lauren Kornreich A2 Hoffman, Robert S. A2 Howland, Mary Ann A2 Lewin, Neal A. A2 Nelson, Lewis S. A2 Goldfrank, Lewis R. SR Print(0) ID 1108428780 T1 Essential Oils T2 Goldfrank's Toxicologic Emergencies, 10e YR 2015 FD 2015 PB McGraw-Hill Education PP New York, NY SN 9780071801843 LK accessemergencymedicine.mhmedical.com/content.aspx?aid=1108428780 RD 2024/03/28 AB Essential oils are a class of volatile oils that are extracted through steam distillation or are cold pressed from the leaves, flowers, bark, wood, fruit, or peel of a single parent plant. The term essential refers to the essence of a plant, rather than an indispensable component of the oil or a vital biologic function. These organic compounds are a mixture of complex hydrocarbons that give the oil its aroma, therapeutic properties, and occasionally cause toxicity. More than 500 essential oils exist and can be categorized into five chemical groups: terpenes, quinines, substituted benzenes, aromatic/aliphatic esters, and phenols and aromatic/aliphatic alcohols.