Description

3,9-Bis(2-(3-(3-tert-butyl-4-hydroxy-5-methylphenyl)propionyloxy)-1,1-dimethylethyl)-2,4,8,10-tetraoxaspiro(5.5)undecane (CAS: 90498-90-1) is a high-performance phenolic antioxidant with the molecular formula C₄₃H₆₄O₁₀. This compound, also known as Sumilizer GA-80, is a sterically hindered spirocyclic antioxidant designed to provide exceptional thermal and oxidative stability to polymers, resins, and other sensitive materials. Its unique molecular structure features dual phenolic moieties linked via a spirocyclic core, enabling efficient radical scavenging and long-term protection against degradation. With a molecular weight of 740.96 g/mol, this antioxidant is particularly effective in polyolefins, styrenics, and engineering plastics, where it helps maintain mechanical properties and color stability under harsh conditions. Suitable for research, industrial applications, and material science studies, this product is supplied as a fine white powder with high purity (>98%) and low volatility.

Properties

• CAS Number: 90498-90-1
• Complexity: 1090
• IUPAC Name: [2-[3-[2-[3-(3-tert-butyl-4-hydroxy-5-methyl-phenyl)propanoyloxy]-1,1-dimethyl-ethyl]-2,4,8,10-tetraoxaspiro[5.5]undecan-9-yl]-2-methyl-propyl] 3-(3-tert-butyl-4-hydroxy-5-methyl-phenyl)propanoate
• InChI: InChI=1S/C43H64O10/c1-27-17-29(19-31(35(27)46)39(3,4)5)13-15-33(44)48-21-41(9,10)37-50-23-43(24-51-37)25-52-38(53-26-43)42(11,12)22-49-34(45)16-14-30-18-28(2)36(47)32(20-30)40(6,7)8/h17-20,37-38,46-47H,13-16,21-26H2,1-12H3
• InChI Key: CGRTZESQZZGAAU-UHFFFAOYSA-N
• Exact Mass: 740.44994823
• Molecular Formula: C43H64O10
• Molecular Weight: 741.0
• SMILES: CC1=CC(=CC(=C1O)C(C)(C)C)CCC(=O)OCC(C)(C)C2OCC3(CO2)COC(OC3)C(C)(C)COC(=O)CCC4=CC(=C(C(=C4)C)O)C(C)(C)C
• Topological: 130
• Monoisotopic Mass: 740.44994823
• Physical Description: Dry Powder
• Synonyms: 90498-90-1, antioxidant ao-80, Sumilizer GA-80, SUMILIZER GA, 077D22V7UR, ADK STAB AO-80, MARK AO 80, ADK STAB LX 803A, 3,9-BIS(2-(3-(3-TERT-BUTYL-4-HYDROXY-5-METHYLPHENYL)PROPIONYLOXY)-1,1-DIMETHYLETHYL)-2,4,8,10-TETRAOXASPIRO(5.5)UNDECANE, EC 410-730-5, LX-802, Benzenepropanoic acid, 3-(1,1-dimethylethyl)-4-hydroxy-5-methyl-, 1,1′-(2,4,8,10-tetraoxaspiro(5.5)undecane-3,9-diylbis(2,2-dimethyl-2,1-ethanediyl)) ester, 3,9-bis(2-(3-(3-tert-butyl-4-hydroxy-5-methylphenyl)propionyloxy-1,1-dimethylethyl)-2,4,8,10-tetraoxaspiro(5.5)undecane, Benzenepropanoic acid, 3-(1,1-dimethylethyl)-4-hydroxy-5-methyl-, 2,4,8,10-tetraoxaspiro(5.5)undecane-3,9-diylbis(2,2-dimethyl-2,1-ethanediyl) ester, Benzenepropanoic acid, 3-(1,1-dimethylethyl)-4-hydroxy-5-methyl-, 2,4,8,10-tetraoxaspiro[5.5]undecane-3,9-diylbis(2,2-dimethyl-2,1-ethanediyl) ester, 3,9-BIS(1,1-DIMETHYL-2-(3-(3-TERT-BUTYL-4-HYDROXY-5-METHYLPHENYL)PROPIONYLOXY)ETHYL)-2,4,8,10-TETRAOXASPIRO(5.5)UNDECANE, 3,9-bis(2-(3-(3-tert-butyl-4-hydroxy-5-methylphenyl)propionyloxy-1,1-dimethylethyl)-2,4,8,10-tetraoxaspiro[5.5]undecane, 3,9-bis[2-[3-(3-tert-butyl-4-hydroxy-5-methylphenyl)propionyloxy]-1,1-dimethylethyl]-2,4,8,10-tetraoxaspiro[5.5]undecane, Benzenepropanoic acid, 3-(1,1-dimethylethyl)-4-hydroxy-5-methyl-, 1,1′-[2,4,8,10-tetraoxaspiro[5.5]undecane-3,9-diylbis(2,2-dimethyl-2,1-ethanediyl)] ester, 410-730-5, SUMILIZER AG 80, Sumilizer GA 80, 2,4,8,10-Tetraoxaspiro[5.5]undecane-3,9-diylbis(2-methylpropane-2,1-diyl) bis(3-(3-(tert-butyl)-4-hydroxy-5-methylphenyl)propanoate), MFCD09838745, [2-[3-[1-[3-(3-tert-butyl-4-hydroxy-5-methylphenyl)propanoyloxy]-2-methylpropan-2-yl]-2,4,8,10-tetraoxaspiro[5.5]undecan-9-yl]-2-methylpropyl] 3-(3-tert-butyl-4-hydroxy-5-methylphenyl)propanoate, (2,4,8,10-tetraoxaspiro[5.5]undecane-3,9-diyl)bis(2-methylpropane-2,1-diyl) bis(3-(3-(tert-butyl)-4-hydroxy-5-methylphenyl)propanoate), 2,4,8,10-Tetraoxaspiro[5.5]undecane-3,9-diylbis(2-methylpropane-2,1-diyl) Bis[3-[3-(tert-butyl)-4-hydroxy-5-methylphenyl]propanoate], 2-[9-(1-{[3-(3-TERT-BUTYL-4-HYDROXY-5-METHYLPHENYL)PROPANOYL]OXY}-2-METHYLPROPAN-2-YL)-2,4,8,10-TETRAOXASPIRO[5.5]UNDECAN-3-YL]-2-METHYLPROPYL 3-(3-TERT-BUTYL-4-HYDROXY-5-METHYLPHENYL)PROPANOATE, C43H64O10, UNII-077D22V7UR, antioxidant AO80, Antioxidant GA80, SCHEMBL77042, DTXSID7052606, MSK3130, AKOS025311539, 3,9-bis[1,1-dimethyl-2-[(3-tert-butyl-4-hydroxy-5-methylphenyl)propionyloxy]ethyl]-2,4,8,10-tetraoxaspiro[5.5]undecane, AS-15299, SY246075, CS-0134339, NS00020547, T3804, D82076, Q27236271, 2,4,8,10-Tetraoxaspiro[5.5]undecane-3,9-diylbis(2-methylpropane-2,1-diyl)bis(3-(3-(tert-butyl)-4-hydroxy-5-methylphenyl)propanoate), 3,9,bis[1,1-dimethyl-2-[beta-(3-t-butyl-4-hydroxy-5-methylphenyl)propionyloxy]ethyl]2,4,8,10-tetraoxaspiro[5,5]undecane, 3,9-bis[1,1-dimethyl-2{beta-(3-t-butyl-4-hydroxy-5-methylphenyl)propionyloxy}-ethyl]-2,4,8,10-tetraoxaspiro[5,5]-undecane, 3,9-BIS[2-(3-(3-TERT-BUTYL-4-HYDROXY-5-METHYLPHENYL)PROPIONYLOXY)-1,1-DIMETHYLETHYL]-2,4,8,10-TETRAOXASPIRO[5,5]UNDECANE, 3,9-bis[2-{3-(3-t-butyl-4-hydroxy-5-methylphenyl)propionyloxy}-1,1-dimethylethyl]-2,4,8,10-tetraoxaspiro[5.5]undecane

Application

This compound is widely used as a stabilizer in polypropylene (PP), polyethylene (PE), and other polymers to prevent thermal and oxidative degradation during processing and end-use. It exhibits excellent compatibility with engineering plastics such as ABS and polystyrene, enhancing their durability under UV exposure and high temperatures. Researchers also utilize it in coatings and adhesives to improve resistance to environmental aging. Its low migration properties make it ideal for long-term applications in automotive and packaging materials.

Safety and Hazards

GHS Hazard Statements

• H312: Harmful in contact with skin [Warning Acute toxicity, dermal]

Precautionary Statements

• P280, P302+P352, P317, P321, P362+P364, and P501

Hazard Classes and Categories

• Acute Tox. 4 (89.3%)

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Disclaimer: Sold exclusively for laboratory research. Prohibited for commercial use, diagnostics, or human/animal applications. Buyers assume all compliance liability.