... grade First grade Dibutyl phthalate(DBP) Density :1.053g/cm3Melting point:-35°CBoiling point:337°C at 760 mmHgRefractive index:1.499Flash ... point:177.4°CWater solubility:Slightly soluble. 0.0013 g/100 ... : ItemAppearanceEster ,%≥Density (20°C),g/cm3Acidity ( as phthalic acid)%≤Flash point ,°C ≥Chroma ,(Pt-Co) # ≤Loss on heat ,%≤Chroma after heat ...