Description

4-[1-(4-Hydroxy-3,5-Dimethylphenyl)-1-Methylbutyl]-2,6-Dimethylphenol is a sterically hindered phenolic compound that functions as a highly effective antioxidant and stabilizer. Its molecular structure provides superior performance in inhibiting oxidative degradation and chain reactions in sensitive materials. This product is essential for formulators and manufacturers in the polymer, lubricant, and specialty chemical industries who require reliable protection against thermal and oxidative stress.

Application

• Polymer Stabilizer: Primary antioxidant for polyolefins (PP, PE), elastomers, and engineering plastics to prevent thermal oxidation during processing and long-term service.
• Lubricant & Fuel Additive: Antioxidant component in synthetic and mineral-based lubricating oils, greases, and industrial fuels to extend service life and maintain viscosity.
• Rubber Industry: Protects synthetic rubbers (SBR, BR, NBR) and natural rubber against aging and flex-cracking caused by heat and oxygen exposure.
• Adhesive & Sealant Formulations: Enhances the shelf-life and durability of hot-melt, pressure-sensitive, and reactive adhesive systems.
• Coating Resins: Stabilizer for alkyd resins and other binder systems susceptible to oxidative cross-linking and yellowing.
• Intermediate for Specialty Chemicals: Used in the synthesis of more complex antioxidant molecules and light stabilizers.

Basic Information

Product Name	4-[1-(4-Hydroxy-3,5-Dimethylphenyl)-1-Methylbutyl]-2,6-Dimethylphenol
CAS No.	122419-17-4
Molecular Formula	C21H28O2
Molecular Weight	312.45 g/mol
Synonyms	2,6-Dimethyl-4-[1-(4-hydroxy-3,5-dimethylphenyl)-1-methylbutyl]phenol; Phenol, 4-[1-(4-hydroxy-3,5-dimethylphenyl)-1-methylbutyl]-2,6-dimethyl-; Antioxidant 1790; AO-1790; Bis(3,5-dimethyl-4-hydroxyphenyl)butane derivative; Hindered phenolic antioxidant 1790; 1,1-Bis(4-hydroxy-3,5-dimethylphenyl)butane (related structure)
EINECS	Contact for details

Quality Control

Our production of 4-[1-(4-Hydroxy-3,5-Dimethylphenyl)-1-Methylbutyl]-2,6-Dimethylphenol adheres to a strict quality management system. Every batch undergoes rigorous analytical testing, including HPLC for assay and purity, to ensure it meets precise specifications for use in high-performance applications. Certificates of Analysis (COA) documenting identity, purity, and key physical parameters are available upon request to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). This material is easily oxidized and should be kept under an inert atmosphere (e.g., nitrogen) after opening to maintain maximum 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	155 - 165 °C
Loss on Drying	≤ 0.5 %
Heavy Metals (as Pb)	≤ 20 ppm

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