Tris(2,4-tert-butylphenyl) Phosphite

• CAT Number: R045017
• CAS Number: 31570-04-4
• Molecular Formula: C42H63O3P
• Molecular Weight: 646.94
• Purity: ≥95%
• Synonyms: 2,4-Bis(1,1-dimethylethyl)phenol 1,1’,1’’-Phosphite?2,4-Bis(1,1-dimethylethyl)phenol Phosphite (3:1); A 2112; ADK 2112; ADK Stab 2112; ADK Stab 2112RG; ADK Stab AS 2112; AO 2; AO 200; AS 2112; AT 168; Alkanox 240; Alkanox P 240; Antioxidant 168; Anti
• Storage: Desiccate at RT
• IUPAC Name: tris(2,4-ditert-butylphenyl) phosphite
• InChI: InChI=1S/C42H63O3P/c1-37(2,3)28-19-22-34(31(25-28)40(10,11)12)43-46(44-35-23-20-29(38(4,5)6)26-32(35)41(13,14)15)45-36-24-21-30(39(7,8)9)27-33(36)42(16,17)18/h19-27H,1-18H3
• InChIKey: JKIJEFPNVSHHEI-UHFFFAOYSA-N
• SMILES: CC(C)(C)C1=CC(=C(C=C1)OP(OC2=C(C=C(C=C2)C(C)(C)C)C(C)(C)C)OC3=C(C=C(C=C3)C(C)(C)C)C(C)(C)C)C(C)(C)C

Tris(2,4-tert-butylphenyl) phosphite (Cat No.: R045017) is an organophosphite antioxidant widely used as a stabilizer in polymers and plastics. With the chemical formula C₄₅H₆₃O₃P, it appears as a white to off-white powder or solid. Its bulky tert-butyl groups enhance thermal stability and oxidative resistance, protecting materials from degradation during processing and aging. Commonly used in polyethylene, polypropylene, and other thermoplastics, it improves product lifespan and clarity. It is non-staining, compatible with other additives, and essential in high-performance plastic formulations and industrial materials.

Reference

1.Thilen, M., and R. Shishoo. "Optimization of experimental parameters for the quantification of polymer additives using SFE/HPLC." Journal of applied polymer science 76.6 (2000): 938-946.
2.Pfaendner, Rudolf. "How will additives shape the future of plastics?." Polymer degradation and stability 91.9 (2006): 2249-2256.