Resin acids are organic compounds that are part of natural resins, mainly from coniferous trees. They are derivatives of diterpenes and have characteristic aroma and acidic properties. The best known are abietinic, pimaric and sandracenic acids.
These substances exhibit antiseptic, anti-inflammatory and wound healing properties. Resin acids are widely used in pharmaceuticals, cosmetics, soaps, varnishes and adhesives due to their bioactivity and ability to interact with other organic substances.