Rosin is yellowish red to yellow transparent solid,
softening point of 70 ~ 90 ℃,
specific gravity 1.070 ~ 1.085,
heat of solution: 15.8kcal/kg, heat capacity: 0.54kcal/kg • ℃,
thermal conductivity: 0.11kcal / m • h • ℃,
volume resistivity: 5 × 1016Ωcm,
flash point: 216 ℃.
Rosin also has crystalline characteristics, prone to crystallization in acetone and other organic solvents will Crystallization trend of the critical crystallization temperature is about 100 ℃,
melting point rosin crystallization of 110 ~ 135 ℃, and difficult to saponification. In addition, the rosin also has optical activity, the value of rosin than spin control in between 0 ~ 15 ° (the best point of +7 °) is the crystallization of amorphous phenomena and trends in the lowest Rosin