Colour & appearance:clear and transparent, Specific gravity (20 DEG. C ) :0.87 max, Refractive index (20 DEG. C ) :1. 4650-1.4710, Initial distillied point:150 DEG. C min, Distillate (distilling below 170 DEG. C at 760 mm pressure) :90%. Acid value (mgKOH/g) :0.5 max