Description

2-Methyl-4-(1,1-Dimethylethyl)-6-(1-Methyl-Pentadecyl)-Phenol is a hindered phenolic compound with a high molecular weight, characterized by its long alkyl chain and tertiary butyl group. This structure is critical for its primary function as a highly effective, non-discoloring antioxidant and stabilizer in polymer systems. It is essential for manufacturers requiring long-term thermal and oxidative stability for their products. Key industries that rely on this specialty chemical include polymer production, lubricant formulation, and the manufacture of adhesives and elastomers.

Application

• Polymer Stabilization: Primary antioxidant for polyolefins (PP, PE), engineering plastics, and synthetic rubbers to prevent thermal-oxidative degradation during processing and service life.
• Lubricant & Grease Additive: Used in industrial and automotive lubricants, hydraulic fluids, and greases to inhibit oxidation, reduce sludge formation, and extend oil life.
• Adhesive & Sealant Formulation: Imparts aging resistance to hot-melt adhesives, pressure-sensitive adhesives, and sealants, preventing embrittlement and loss of adhesion.
• Elastomer Protection: Stabilizer for synthetic rubbers like SBR, EPDM, and NBR, protecting against heat and oxygen-induced crosslinking or chain scission.
• Fuel & Petrochemical Additive: Acts as an antioxidant in fuels, transformer oils, and other hydrocarbon-based fluids to enhance stability and prevent gum formation.
• Co-additive Synergy: Often used in combination with secondary antioxidants (e.g., phosphites, thioesters) or UV stabilizers for comprehensive polymer stabilization packages.

Basic Information

Product Name	2-Methyl-4-(1,1-Dimethylethyl)-6-(1-Methyl-Pentadecyl)-Phenol
CAS No.	157661-93-3
Molecular Formula	C27H48O
Molecular Weight	388.68 g/mol
Synonyms	2-tert-Butyl-6-(1-methylpentadecyl)-4-methylphenol; 6-(1-Methylpentadecyl)-2-tert-butyl-4-methylphenol; Phenol, 2-(1,1-dimethylethyl)-4-methyl-6-(1-methylpentadecyl)-; High Molecular Weight Hindered Phenol Antioxidant; AO-18 (common industry designation); Antioxidant 1790; Bisomer Antioxidant; Long-chain alkylated phenol
EINECS	Contact for details

Quality Control

Every batch of our 2-Methyl-4-(1,1-Dimethylethyl)-6-(1-Methyl-Pentadecyl)-Phenol is produced and tested under a strict quality management system. We ensure compliance with relevant industry standards for polymer additives. Comprehensive testing includes identity confirmation, purity assay, and critical physical property verification. A Certificate of Analysis (COA) detailing all test results is provided with each shipment to guarantee traceability and consistent performance.

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 product is easily oxidized; for long-term storage, maintaining an inert atmosphere (e.g., under nitrogen) in the container headspace is recommended to preserve efficacy. Keep away from strong oxidizing agents, heat, and ignition sources.

Specification

Item	Specification
Appearance	White to off-white crystalline powder or flakes
Identification (IR)	Conforms to reference spectrum
Assay (HPLC)	≥ 98.0 %
Melting Point	48 - 52 °C
Loss on Drying	≤ 0.5 %
Ash Content	≤ 0.1 %

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