Description

2,2′,3,3′,5,5′-Hexamethyl-4,4′-dihydroxybiphenyl (CAS No. 19956-76-4) is a high-purity biphenyl derivative with the molecular formula C₁₈H₂₂O₂. This compound, also known by its IUPAC name 4-(4-hydroxy-2,3,5-trimethylphenyl)-2,3,6-trimethylphenol, features a symmetrically substituted biphenyl core with hydroxyl groups at the 4 and 4′ positions and methyl groups at the 2,2′,3,3′,5,5′ positions. Its unique sterically hindered phenolic structure makes it valuable for advanced research applications, particularly in polymer stabilization, antioxidant studies, and material science. The compound is supplied as a fine crystalline powder with ≥95% purity (HPLC), ensuring consistency for demanding laboratory use. Store in a cool, dry place, protected from light to maintain stability.

Properties

• CAS Number: 19956-76-4
• Complexity: 297
• IUPAC Name: 4-(4-hydroxy-2,3,5-trimethyl-phenyl)-2,3,6-trimethyl-phenol
• InChI: InChI=1S/C18H22O2/c1-9-7-15(11(3)13(5)17(9)19)16-8-10(2)18(20)14(6)12(16)4/h7-8,19-20H,1-6H3
• InChI Key: IOJCFCLZQBXCIQ-UHFFFAOYSA-N
• Exact Mass: 270.161979940
• Molecular Formula: C18H22O2
• Molecular Weight: 270.4
• SMILES: CC1=CC(=C(C(=C1O)C)C)C2=C(C(=C(C(=C2)C)O)C)C
• Topological: 40.5
• Monoisotopic Mass: 270.161979940
• Synonyms: 19956-76-4, 2,2′,3,3′,5,5′-HEXAMETHYL-4,4′-DIHYDROXYBIPHENYL, 2,2′,3,3′,5,5′-hexamethyl-[1,1′-biphenyl]-4,4′-diol, 4,4′-Bi[2,3,6-trimethylphenol], [1,1′-Biphenyl]-4,4′-diol, 2,2′,3,3′,5,5′-hexamethyl-, 4-(4-hydroxy-2,3,5-trimethylphenyl)-2,3,6-trimethylphenol, 4,4′-Dihydroxy-2,2′,3,3′,5,5′-hexamethylbiphenyl, 2,2′,3,3′,5,5′-Hexamethyl[1,1′-biphenyl]-4,4′-diol, MFCD00274654, SCHEMBL1176388, DTXSID50350860, AKOS032948066, AS-69318, DB-375998, CS-0159349, D5280, I12072, 2,2′,3,3′,6,6′-hexamethyl-4,4′-biphenol, 2,2′,3,3′,5,5′-Hexamethyl-[1,1′-biphenyl]-4,4′-diol, 99%

Application

This compound is primarily used as a stabilizer and antioxidant in polymer research due to its sterically hindered phenolic structure. It finds applications in studying oxidative degradation mechanisms in plastics, elastomers, and synthetic resins. Researchers also utilize it as a building block for synthesizing advanced materials with tailored thermal and oxidative stability. Its symmetrical biphenyl core makes it a candidate for liquid crystal and supramolecular chemistry studies.

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