Galata's Markphos® phosphite co-stabilizers are used in PVC formulations in combination with mixed metal stabilizers. Organic phosphites are useful in protecting properties of many polymers and perform a variety of functions including maintaining transparency and initial color hold, reinforcing the effectiveness of primary antioxidants as thermal & processing stabilizers in polyolefins, elastomers and engineering plastics and upgrading the service life and weatherability of plastics in outdoor use. Phosphite co-stabilizers are also added to polyolefins, polyurethane and other polymer resins.