... 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 ... .044-1.048Acidity ( as phthalic acid)%≤0.0100.0150.030Flash point ,°C ≥160Chroma ,(Pt-Co) # ≤202560Loss on heat ,%≤0.30.50 ...