Abietic acid (also known as abietinic acid or sylvic acid) is an organic compound that occurs widely in trees. It is the primary component of resin acid, is the primary irritant in pine wood and resin, isolated from rosin (via isomerization) and is the most abundant of several closely related organic acids that constitute most of rosin, the solid portion of the oleoresin of coniferous trees. Its ester or salt is called an abietate.
|Preferred IUPAC name
Abietinic acid; Sylvic acid
3D model (JSmol)
CompTox Dashboard (EPA)
|Molar mass||302.458 g·mol−1|
|Appearance||Yellow resinous powder, crystals or chunks. Monoclinic plates (from EtOH/water). Colorless solid when pure.|
|Melting point||172–175 °C (342–347 °F; 445–448 K)|
|Solubility in other solvents||Very soluble in acetone, petroleum ether, Et2O, and ethanol|
|Occupational safety and health (OHS/OSH):|
|P261, P272, P280, P302+P352, P321, P333+P313, P363, P501|
|NFPA 704 (fire diamond)|
|Safety data sheet (SDS)||MSDS|
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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