Lankromark™ LE109 is an aryl phosphite. It holds a wide variety of food approvals and is an efficient co-stabilizer in the production of flexible and semi-rigid PVC film by calendering, extrusion and injection molding. In other polymers TNPP is effective as a stabilizer which improves color processing stability during recovery, drying, compounding and processing. It can have a synergistic effect if used in combination with other hindered phenols. During polymerization it can act alone or in combination with monomers.