3,9-Bis(2,4-di-tert-butylphenoxy)-2,4,8,10-tetraoxa-3,9-diphosphaspiro[5.5]undecane TCI B5664

Chemical Identity

Other names: Pentaerythritol Bis(2,4-di-tert-butylphenylphosphite)
CAS No.: 26741-53-7
PubChem: CID 93101·SID 354335130
Formula: C33H50O6P2
Molecular weight: 604.70 g/mol
Purity: >95.0%(GC)
Reference databases: ChemSpider·ECHA·Wikipedia

Full identifiers (IUPAC, SMILES, InChIKey)

IUPAC: 3,9-bis(2,4-ditert-butylphenoxy)-2,4,8,10-tetraoxa-3,9-diphosphaspiro[5.5]undecane
SMILES: CC(C)(C)C1=CC(=C(C=C1)OP2OCC3(CO2)COP(OC3)OC4=C(C=C(C=C4)C(C)(C)C)C(C)(C)C)C(C)(C)C
InChIKey: AIBRSVLEQRWAEG-UHFFFAOYSA-N
MDL: MDL00071521

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Berat 5g 25g

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3,9-Bis(2,4-di-tert-butylphenoxy)-2,4,8,10-tetraoxa-3,9-diphosphaspiro[5.5]undecane is an organophosphorus antioxidant and thermal stabilizer widely used in polymer formulation and research. As a phosphite-type stabilizer, it effectively prevents oxidative degradation during polymer processing and extends the service life of finished materials such as polypropylene, polyethylene, and engineering resins. Its spirocyclic structure with sterically hindered 2,4-di-tert-butylphenoxy groups provides excellent thermal stability and resistance to discoloration under high-temperature conditions.