Turpentine

Turpentine is the steam-distilled oleoresin of pine trees — the original natural solvent used in paints, varnishes, and waxes before petroleum distillates took over in the mid-20th century. It is still common as a minor co-solvent in traditional carnauba paste waxes, where it reinforces the wax-dispersion behavior of the petroleum carrier. The chemistry is reactive: turpentine is a mixture of monoterpenes (mostly α-pinene and β-pinene, with Δ3-carene), which oxidize on exposure to air to form sensitizing peroxides. Repeated bare-hand contact can cause an allergic skin reaction that worsens with subsequent exposures — this is why turpentine-containing waxes are commonly classified H317 (skin sensitizer Cat 1) at the mixture level. The same oxidation chemistry produces ground-level ozone in air, making turpentine a meaningful VOC contributor. Environmentally, turpentine biodegrades readily and is not bioaccumulative, but it has documented aquatic toxicity at concentration. The leave-on pathway in paste-wax application reduces the environmental impact compared to rinse-off uses.