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Atomfair Diphenyl isodecyl phosphite Weston DPDP C22H31O3P

Description Diphenyl Isodecyl Phosphite (CAS No. 26401-27-4) is a high-purity organophosphite compound with the molecular formula C22H31O3P, also known by its IUPAC name 8-methylnonyl diphenyl phosphite . This specialty chemical serves as an effective secondary antioxidant and stabilizer in polymer formulations, particularly in PVC, polyolefins, and synthetic rubbers. Its molecular structure combines a branched isodecyl group with diphenyl phosphite functionality, offering excellent hydrolytic stability and compatibility with a wide range of polymer systems. The product is supplied as a clear, colorless to pale yellow liquid with typical purity >98% (GC), viscosity of 15-25 cSt at 25??C, and a refractive index…

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Description

Description

Diphenyl Isodecyl Phosphite (CAS No. 26401-27-4) is a high-purity organophosphite compound with the molecular formula C22H31O3P, also known by its IUPAC name 8-methylnonyl diphenyl phosphite. This specialty chemical serves as an effective secondary antioxidant and stabilizer in polymer formulations, particularly in PVC, polyolefins, and synthetic rubbers. Its molecular structure combines a branched isodecyl group with diphenyl phosphite functionality, offering excellent hydrolytic stability and compatibility with a wide range of polymer systems. The product is supplied as a clear, colorless to pale yellow liquid with typical purity >98% (GC), viscosity of 15-25 cSt at 25??C, and a refractive index of 1.505-1.515. Proper storage under inert atmosphere at 2-8??C is recommended to maintain optimal performance characteristics.

  • CAS No: 26401-27-4
  • Molecular Formula: C22H31O3P
  • Molecular Weight: 374.5
  • Exact Mass: 374.20108184
  • Monoisotopic Mass: 374.20108184
  • IUPAC Name: 8-methylnonyl diphenyl phosphite
  • SMILES: CC(C)CCCCCCCOP(OC1=CC=CC=C1)OC2=CC=CC=C2
  • Synonyms: Isodecyl diphenyl phosphite, 26544-23-0, Weston DPDP, Phosphorous acid, isodecyl diphenyl ester, Diphenyl isodecyl phosphite

Application

Diphenyl isodecyl phosphite is widely employed as a costabilizer in PVC processing to prevent thermal degradation and color formation. It demonstrates synergistic effects when combined with primary antioxidants like hindered phenols in polyolefin stabilization systems. The compound also finds use as a ligand in organometallic catalysis and as an intermediate for specialty phosphite derivatives. Its branched alkyl chain provides improved solubility in non-polar matrices compared to linear alkyl analogs.

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