Triethylene glycol Bis(3-​tert-​butyl-​4-​hydroxy-​5-​methylphenyl)​propionate

• CAT Number: R034428
• CAS Number: 36443-68-2
• Molecular Formula: C34H50O8
• Molecular Weight: 586.77
• Purity: ≥95%
• Synonyms: ADK Stab AO 70; AO 245; AO 70; AT 245; Antioxidant 245; Chemnox 245; Chinox 245; Ethylenebis(oxyethylene) bis[3-(5-tert-butyl-4-hydroxy-m-tolyl)propionate];?Ethylenebis(oxyethylene)bis(3-tert-butyl-4-hydroxy-5-methylbenzenepropanoate);?Hostanox 245
• Storage: -20°C
• IUPAC Name: 2-[2-[2-[3-(3-tert-butyl-4-hydroxy-5-methylphenyl)propanoyloxy]ethoxy]ethoxy]ethyl 3-(3-tert-butyl-4-hydroxy-5-methylphenyl)propanoate
• InChI: InChI=1S/C34H50O8/c1-23-19-25(21-27(31(23)37)33(3,4)5)9-11-29(35)41-17-15-39-13-14-40-16-18-42-30(36)12-10-26-20-24(2)32(38)28(22-26)34(6,7)8/h19-22,37-38H,9-18H2,1-8H3
• InChIKey: QSRJVOOOWGXUDY-UHFFFAOYSA-N
• SMILES: CC1=C(C(=CC(=C1)CCC(=O)OCCOCCOCCOC(=O)CCC2=CC(=C(C(=C2)C(C)(C)C)O)C)C(C)(C)C)O

Triethylene glycol bis(3-tert-butyl-4-hydroxy-5-methylphenyl)propionate(CAT: R034428) is a sterically hindered phenolic antioxidant widely used to stabilize polymers, plastics, and elastomers against oxidative degradation. With two bulky phenolic moieties linked by a triethylene glycol backbone, it offers excellent thermal stability and long-term protection by scavenging free radicals and interrupting oxidation chains. This compound is particularly effective in high-temperature processing and storage applications due to its non-volatile nature and low migration. It is commonly incorporated into materials such as polyethylene, polypropylene, polyesters, and synthetic rubbers, helping to extend product lifespan and performance.