Liquid Phosphites

Liquid Phosphites

High quality secondary antioxidants for a broad range of polymers.


Galata’s Markphos® phosphite stabilizers are typically used in PVC formulations in combination with mixed metal stabilizers. These organic phosphites are useful in protecting properties of many polymers and perform a variety of functions, including maintaining transparency and initial color hold. Organic phosphites are also effective in reinforcing the effectiveness of primary antioxidants as thermal stabilizers & processing aids in polyolefins, elastomers, and engineering thermoplastics, and upgrading the service life and weatherability of plastics in outdoor applications.

Our phosphite co-stabilizers are also added to polyolefins, polyurethane, and other polymer resins. Through Galata’s strong global manufacturing, sales, and technical service footprint, we have been a reliable partner to our customers for addressing their stabilizer needs. Contact our support team to discuss your custom small- or large-batch manufacturing requirements today.

Product Information Request Chemistry Typical %P Suggested Applications Attributes
MARKPHOS DPDP TDS/SDS Diphenyl Isodecyl Phosphite 8.3% Co-stabilization in combination with metal soaps in plasticized PVC up to 1.0%; in PU, ABS, and PC up to 3.0%. Alkyl-aryl phosphite of intermediate molecular weight
MARKPHOS EHDP TDS/SDS 2-ethylhexyl Diphenyl Phosphite 9.0% Co-stabilization in combination with metal soaps in plasticized PVC up to 1.0%; in PU, ABS, and PC up to 3.0%. Alkyl-aryl phosphite of the lowest molecular weight and the highest phosphorus content
MARKPHOS PDDP TDS/SDS Phenyl Diisodecyl Phosphite 7.0% Co-stabilization in combination with metal soaps in plasticized PVC up to 1.0%; in PU, ABS, and PC up to 3.0%. Highest molecular weight alkyl-aryl phosphite
MARKPHOS TDP TDS/SDS Triisodecyl Phosphite 6.2% Co-stabilization in combination with metal soaps of plasticized PVC up to 1.0%; in PU, ABS, and PC up to 3.0%. Alkyl phosphite with low molecular weight and high phosphorus content
MARKPHOS TTDP TDS/SDS Triisotridecyl Phosphite 4.9% Co-stabilization in combination with metal soaps in plasticized PVC and plastisols up to 1.0% Highest molecular weight alkyl phosphite of low free phenol content and very low odor
MARKPHOS TPP TDS/SDS Triphenyl Phosphite 10% Co-stabilization in combination with metal soaps in PVC, PU, styrenics, engineering thermoplastics, rubber and polyesters up to 3.0%. Also used as an intermediate for preparation of other phosphites. Aryl phosphite of high phosphorus content
MARKPHOS TNPP TDS/SDS Tris (nonylphenyl) Phosphite 4.4% Improves color and processability of PVC, PU, PE, PP, ABS, PS, PET, PC and elastomers; suitable for use in a broad range of articles intended to come in contact with food. Aryl phosphite with high molecular weight