... liquid, boiling point: 154°C, flash point: >57°C,specific gravity(25°C): 0.96, Refractive Index (20 °C ):1.4340~1.4350 2 ... . Technical Data Sheet(TDS) SpecificationsXY680PXY680AXY680BViscosity, mPas (25°C)≤2≤2≤7Color, APHA≤30≤60≤100Epoxy value, eq/100g ... intermediate of electronic coat.Dosage: In general, XY680 would be 10-15% of Epoxy Resin in weight, XY680 contains epoxy group ...