Doverphos 1220 Diisodecyl pentaerythritol diphosphite 26544-27-4 ICC Industries-Dover Antioxidant >> Phosphite Coatings >> Powder Coatings Coil Coating Powder coating Diisodecyl Pentaerythritol Diphosphite. Used as an antioxidant in powder and coil coating formulations. Prevents discoloration and loss of physical properties. Diisodecyl pentaerythritol diphosphite. Used as an antioxidant in powder and coil coating formulations. Prevents discoloration and loss of physical properties.