Description

Diisodecyl pentaerythritol diphosphite (CAS No. 26544-27-4) is a high-performance organophosphite stabilizer widely used in polymer and resin formulations. With the molecular formula C₂₅H₅₀O₆P₂, this compound acts as an effective secondary antioxidant, preventing oxidative degradation and extending the lifespan of polymeric materials. Its unique cyclic neopentanetetrayl phosphite structure ensures excellent hydrolytic stability, making it ideal for high-temperature processing applications. Diisodecyl pentaerythritol diphosphite is particularly valued in the plastics industry for its ability to enhance color retention, reduce viscosity drift, and improve overall material performance. Suitable for use in polyolefins, PVC, and other synthetic polymers, this product is a must-have for researchers and scientists focused on advanced material stabilization.

Properties

• CAS Number: 26544-27-4
• Complexity: 418
• IUPAC Name: 3,9-bis(8-methylnonoxy)-2,4,8,10-tetraoxa-3,9-diphosphaspiro[5.5]undecane
• InChI: InChI=1S/C25H50O6P2/c1-23(2)15-11-7-5-9-13-17-26-32-28-19-25(20-29-32)21-30-33(31-22-25)27-18-14-10-6-8-12-16-24(3)4/h23-24H,5-22H2,1-4H3
• InChI Key: YLUZWKKWWSCRSR-UHFFFAOYSA-N
• Exact Mass: 508.30826331
• Molecular Formula: C25H50O6P2
• Molecular Weight: 508.6
• SMILES: CC(C)CCCCCCCOP1OCC2(CO1)COP(OC2)OCCCCCCCC(C)C
• Topological: 55.4
• Monoisotopic Mass: 508.30826331
• Synonyms: 26544-27-4, Diisodecyl pentaerythritol diphosphite, UNII-149I22YK0I, 149I22YK0I, EINECS 247-779-5, 2,4,8,10-Tetraoxa-3,9-diphosphaspiro[5.5]undecane, 3,9-bis(isodecyloxy)-, 2,4,8,10-Tetraoxa-3,9-diphosphaspiro(5.5)undecane, 3,9-bis(isodecyloxy)-, ISODECYL ALCOHOL, CYCLIC NEOPENTANETETRAYL PHOSPHITE, PHOSPHOROUS ACID, CYCLIC NEOPENTANETETRAYL DIISODECYL ESTER, PHOSPHOROUS ACID, ISODECYL ESTER, CYCLIC DIESTER WITH PENTAERYTHRITOL, 247-779-5, 3,9-bis(8-methylnonoxy)-2,4,8,10-tetraoxa-3,9-diphosphaspiro[5.5]undecane, 3,9-Bis(Isodecyloxy)-2,4,8,10-tetraoxa-3,9-diphosphaspiro[5.5]undecane, 3,9-Bis(isodecyloxy)-2,4,8,10-tetraoxa-3,9-diphosphaspiro(5.5)undecane, 2,4,8,10-Tetraoxa-3,9-diphosphaspiro[5.5]undecane,3,9-bis(isodecyloxy)-, SCHEMBL8853636, YLUZWKKWWSCRSR-UHFFFAOYSA-N, Q27251612

Diisodecyl pentaerythritol diphosphite is primarily used as a secondary antioxidant in polymer formulations to prevent thermal and oxidative degradation during processing and end-use. It is especially effective in polyolefins, PVC, and engineering plastics, where it enhances color stability and mechanical properties. The compound’s hydrolytic resistance makes it suitable for applications requiring prolonged exposure to moisture or high temperatures. Researchers also utilize it in adhesives, coatings, and elastomers to improve durability and performance under harsh conditions.

Safety and Hazards

GHS Hazard Statements

• Not Classified
• Reported as not meeting GHS hazard criteria by 121 of 121 companies. For more detailed information, please visit ECHA C&L website.

Hazard Classes and Categories

• Not Classified

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