Pine tar along with many other ingredients due to a lack of proof of their effectiveness. Some pine tar products contain creosote, a probable carcinogen. Creosote potentially may be produced when the pine wood is heated up to high temperatures in the creation of pine tar. Pine tar is also used in veterinary medicine as an expectorant and an antiseptic in chronic skin conditions. Pine tar Pine tar is a sticky material produced by the high temperature carbonization of pine wood in anoxic conditions (dry distillation or destructive distillation). The wood is rapidly decomposed by applying heat and pressure in a closed
Cedar oil was laid in natrum or natron—a fixed alkali—for the prescribed period, after which the cedarwood oil, which had dissolved the soft organs, was released; and the body, its flesh dissolved by the natron, was reduced to preserved skin and bones. Until the development of synthetic immersion oil in the 1940s, cedarwood oil was widely used for the oil immersion objective in light microscopy. It is still sometimes also used to clarify emeralds. Cedar leaf oil from "Cedrus atlantica" does not contain thujone. Cedarwood oil is a mixture of organic compounds considered generally safe by the FDA as a food additive