Appearance: Colorless to clear yellow viscous liquid Colour:60max APHA Acid No.: 0.1 max mg KOH/g Refractive Index(25¡æ): 1.523-1.528 Viscosity(25¡æ): 2500-5000 mPa.s Specific Gravity(25¡æ) : 0.980-0.992 g/cm3 Phosphorus Content: 3.8%min Free Nonyl Phenol: 5%max. 200kgs/Drum.