Pigment yellow 139 Physical, Chemical and Fastness Properties Application Molecular Weight 367.27 Molecular Formula C16H9N5O6 P.H. Value 6.0-7.5 Density 1.8 Oil Absorption(ml/100g)% 52 Light Fastness 7 Heat Resistance 240 (°C) Water Resistance 5 Oil Resistance 5 Acid Resistance 5 Alkali Resistance 5 Shade: Reddish Yellow Main Application: Plastic