Melting point ℃ 58-60 Oil content maximum ,%(m/m) 1.5 Color, No. minimum 18 Light Stability, No. minimum 6 Needle penetration, maximum (25℃,100g),1/10mm 22 Kinematic viscosity (100¦C, mm¦/s) 4.17 Ordor, maximum 2 Water-solubility acid and alkali Nil Mechanical impurity and water Nil.