| Abietic acid, the most abundant of several closely related organic acids that constitute most of rosin, the solid portion of the oleoresin of coniferous trees. |
| For example, the nonvolatile substances present in resins produced by trees of the pine family contain diterpene carboxylic acids belonging to three types: abietic, palustric, and elliotinoic. |
| Among dierpenes, palustric acid reveals the highest level, which is followed by neoabietic acid and abietic acid. |
| The constituents of rosin are chiefly abietic acid or its anhydride together with pinic and sylvic acids. |
| Also workers in the wood processing trade may have contact with abietic acid. |
| Tall oil is principally a mixture of resin acids, such as abietic acid, and fatty acids, such as oleic and linoleic acids, with some sterols and other compounds. |
