It is the slight yellow transparent solid, which is adducts of gum rosin and maleic anhydride through the esterification by glycerol. Specificationsú¦ Color (Gardner grade): 5max Softening point, oC:130í+3 Acid value (mgKOH/g): 20-30 Solubility in Benzeneú¿1í+1ú¬:Compatible,clear Typical Uses They are used in paint and coating industries widely, for production of phenolic paints (through polymerization with plant oils); improve hardness of paint films, gloss and rubbing property for Polyesters, Nitro and PU paints. Forms and Packaging: 1. Bag: beads or Flake, Kraft paper bag, 25kgs net each bag. 2. Packing specified by customers.