Description

4,4′-Methylenebis[2,6-di-tert-butylphenol] (CAS No. 118-82-1) is a high-performance sterically hindered phenolic antioxidant widely used in polymer stabilization and industrial applications. With the molecular formula C₂₉H₄₄O₂, this compound effectively inhibits oxidative degradation by scavenging free radicals, thereby extending the lifespan of materials exposed to heat, light, and mechanical stress. Its IUPAC name, 2,6-ditert-butyl-4-[(3,5-ditert-butyl-4-hydroxyphenyl)methyl]phenol, reflects its robust molecular structure, which ensures excellent thermal stability and low volatility. Available under trade names such as Ionox 220, Binox M, and Antioxidant E 702, this product is ideal for polyolefins, lubricants, adhesives, and elastomers. Packaged under inert conditions to maintain purity, it is supplied as a white to off-white crystalline powder with ≥98% assay.

Properties

• CAS Number: 118-82-1
• Complexity: 480
• IUPAC Name: 2,6-ditert-butyl-4-[(3,5-ditert-butyl-4-hydroxy-phenyl)methyl]phenol
• InChI: InChI=1S/C29H44O2/c1-26(2,3)20-14-18(15-21(24(20)30)27(4,5)6)13-19-16-22(28(7,8)9)25(31)23(17-19)29(10,11)12/h14-17,30-31H,13H2,1-12H3
• InChI Key: MDWVSAYEQPLWMX-UHFFFAOYSA-N
• Exact Mass: 424.334130642
• Molecular Formula: C29H44O2
• Molecular Weight: 424.7
• SMILES: CC(C)(C)C1=CC(=CC(=C1O)C(C)(C)C)CC2=CC(=C(C(=C2)C(C)(C)C)O)C(C)(C)C
• Topological: 40.5
• Monoisotopic Mass: 424.334130642
• Physical Description: Liquid; Dry Powder
• Synonyms: 118-82-1, 4,4′-METHYLENEBIS(2,6-DI-TERT-BUTYLPHENOL), Ionox 220, Binox M, Antioxidant E 702, Ethyl 702, 4,4′-Methylenebis(2,6-di-t-butylphenol), MB 1 (Antioxidant), Ionox 220 antioxidant, LZ-MB 1, Etil 702, L 3MB1, Phenol, 4,4′-methylenebis[2,6-bis(1,1-dimethylethyl)-, ANTIOXIDANT 702, E 702, 2,2′,6,6′-Tetra-tert-butyl-4,4′-methylenediphenol, MB 1 (antioxidant) (VAN), NSC 30551, CCRIS 5836, Di(4-hydroxy-3,5-di-tert-butylphenyl)methane, EINECS 204-279-1, Phenol, 4,4′-methylenebis(2,6-di-tert-butyl-, BRN 1916919, DTXSID7022411, VANLUBE DTB, Phenol, 4,4′-methylenebis(2,6-bis(1,1-dimethylethyl)-, ANTIOXIDANT 728, NSC-30551, AGIDOL 23, ANTIOXIDANT 4426, ETHANOX 702, ANTIOXIDANT T 511, ETHANOX 4702, 4,4′-Methylenebis(2,6-bis(1,1-dimethylethyl)phenol), ETHYL 728, DTXCID702411, HITEC 4702, 3,3′,5,5′-Tetra-tert-butyl-4,4′-dihydroxydiphenylmethane, 37N5K66648, EC 204-279-1, 4-06-00-06811 (Beilstein Handbook Reference), 4,4′-Methylenebis[2,6-Di-tert-butylphenol], Phenol, 4,4′-methylenebis[2,6-di-tert-butyl-, H 301/92, Alkylated phenol, LZMB 1, 4,4’Methylenebis(2,6ditbutylphenol), Di(4hydroxy3,5ditertbutylphenyl)methane, Phenol, 4,4’methylenebis(2,6ditertbutyl, 2,2′,6,6’Tetratertbutyl4,4’methylenediphenol, 4,4’Dihydroxy3,3′,5,5’tetratertbutyldiphenylmethan, 4,4’Methylenebis(2,6bis(1,1dimethylethyl)phenol), Phenol, 4,4’methylenebis(2,6bis(1,1dimethylethyl), Phenol, 4,4′-methylenebis(2,6-di-tert-butyl-(8CI), Bimox M, 2,6-ditert-butyl-4-[(3,5-ditert-butyl-4-hydroxyphenyl)methyl]phenol, CHEBI:34369, Bis(3,5-di-tert-butyl-4-hydroxyphenyl)methane, 4,4-methylenebis(2,6-di-tert-butylphenol), 4,4′-methanediylbis(2,6-di-tert-butylphenol), CAS-118-82-1, 2,6-bis(tert-butyl)-4-{[3,5-bis(tert-butyl)-4-hydroxyphenyl]methyl}phenol, Binox-M, UNII-37N5K66648, bis-BHT, MFCD00008822, SCHEMBL39559, IONOL 220, BIDD:ER0322, SCHEMBL8514613, CHEMBL1795577, SCHEMBL14472045, MDWVSAYEQPLWMX-UHFFFAOYSA-, MSK3124, BP_22, NSC30551, Tox21_201863, Tox21_303566, SBB007948, STK709201, AKOS001063755, NCGC00249128-01, NCGC00249128-02, NCGC00257323-01, NCGC00259412-01, AS-15298, ST029303, DB-041427, 4,4′-methyl enebis(2,6-di-t-butylphenol), 4,4′-methylene-bis(2,6-di-t-butylphenol), M0214, NS00001137, Phenol,4′-methylenebis[2,6-di-tert-butyl-, Di(3,5-di-tert-butyl-4-hydroxyphenyl)methane, 4,4′-methylene bis(2,6-di-tert-butylphenol), 4,4′-methylene-bis(2,6-di-tert-butylphenol), 4,4′-methylenebis (2,6-di-tert-butylphenol), 4,4′-Methylenebis(2,6-di-tert-butylphenol), Bis(4-hydroxy-3,5-di-tert-butylphenyl)methane, F71321, 4,4′-methylene bis(2,6-di-tert-butyl phenol), AB01317498-02, 4,4′-Methylenebis(2,6-di-tert-butylphenol), 98%, Phenol,4′-methylenebis[2,6-bis(1,1-dimethylethyl)-, Q27116023, Z56888647, 4,4′-Dihydroxy,3,3′-5,5′-tetra-t-butyldiphenylmethane, 4,4′-methanediylbis[2,6-bis(1,1-dimethylethyl)phenol], 4,4′-Dihydroxy-3,3′,5,5′-tetra-tert-butyldiphenylmethane, 4,4′-Dihydroxy-3,5,3′,5′-tetra-tert-butyldiphenylmethane, Phenol, 4,4′-methylenebis 2,6-bis(1,1-dimethylethyl)-, 4-(3,5-di-tert-butyl-4-hydroxy-benzyl)-2,6-di-tert-butylphenol, 4 pound not4 inverted exclamation marka-Methylenebis(2 pound not6-di-tert-butylphenol), 204-279-1, InChI=1/C29H44O2/c1-26(2,3)20-14-18(15-21(24(20)30)27(4,5)6)13-19-16-22(28(7,8)9)25(31)23(17-19)29(10,11)12/h14-17,30-31H,13H2,1-12H3

Application

4,4′-Methylenebis[2,6-di-tert-butylphenol] is primarily used as an antioxidant in polypropylene (PP), polyethylene (PE), and other polymers to prevent thermal and oxidative degradation during processing and end-use. It also serves as a stabilizer in synthetic lubricants and greases, enhancing their performance under high-temperature conditions. Additionally, this compound finds applications in adhesives, rubber products, and coatings where long-term durability is critical.

Safety and Hazards

GHS Hazard Statements

• H413 (18.2%): May cause long lasting harmful effects to aquatic life [Hazardous to the aquatic environment, long-term hazard]

Precautionary Statements

• P273, and P501

Hazard Classes and Categories

• Aquatic Chronic 4 (18.2%)

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