Description

4,4'-Di-tert-Butyl-O,O'-Biphenol is a high-purity, sterically hindered biphenol derivative widely used as a key intermediate and performance additive. Its molecular structure provides excellent antioxidant properties and thermal stability, making it a critical component in advanced material synthesis. This compound is essential for manufacturers in the polymer, specialty chemical, and pharmaceutical industries seeking to enhance product durability and performance under demanding conditions.

Application

• Polymer Antioxidant & Stabilizer: Acts as a highly effective phenolic antioxidant in polyolefins (e.g., PP, PE), polyesters, and engineering plastics to prevent thermal and oxidative degradation during processing and end-use.
• Pharmaceutical Intermediate: Serves as a crucial building block for synthesizing complex molecules, including active pharmaceutical ingredients (APIs) and drug candidates that require hindered phenol motifs.
• Liquid Crystal Monomer: Used in the production of monomers for high-performance liquid crystal polymers (LCPs) and display materials due to its rigid biphenyl core and stable tert-butyl groups.
• Specialty Chemical Synthesis: Functions as a versatile intermediate in organic synthesis for creating ligands, catalysts, and other fine chemicals where steric hindrance is beneficial.
• Additive for Fuels & Lubricants: Employed as an antioxidant additive in high-performance lubricants and industrial fluids to extend service life and maintain viscosity under high-temperature operation.
• Cross-linking Agent & Co-monomer: Utilized in the manufacture of epoxy resins, phenolic resins, and other thermosetting polymers to modify thermal and mechanical properties.

Basic Information

Product Name	4,4'-Di-tert-Butyl-O,O'-Biphenol
CAS No.	63992-30-3
Molecular Formula	C20H26O2
Molecular Weight	298.42 g/mol
Synonyms	4,4'-Di-tert-butyl-2,2'-biphenol; 2,2'-Biphenol, 4,4'-bis(1,1-dimethylethyl)-; 4,4'-Di-tert-butylbiphenyl-2,2'-diol; 4,4'-Bis(tert-butyl)-2,2'-biphenol; 4,4'-Di-tert-butyl-[1,1'-biphenyl]-2,2'-diol; DTBBP; DBBA (Di-tert-Butyl Biphenol A); Contact for other trade names.
EINECS	Contact for details

Quality Control

Our 4,4'-Di-tert-Butyl-O,O'-Biphenol is manufactured under strict quality management systems to ensure batch-to-batch consistency and high purity. We provide comprehensive Certificates of Analysis (COA) with each shipment, detailing key parameters such as assay, identity, and impurity profiles. Our quality commitment aligns with cGMP principles where applicable, and we support compliance with global regulatory frameworks including REACH.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). This product is easily oxidized and should be handled and stored under an inert atmosphere (e.g., nitrogen or argon) for long-term preservation to maintain optimal purity and efficacy. Keep away from strong oxidizing agents.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to reference spectrum
Assay (HPLC)	≥ 98.0%
Melting Point	158°C - 162°C
Loss on Drying	≤ 0.5%
Residue on Ignition	≤ 0.1%
Heavy Metals (as Pb)	≤ 20 ppm

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.