Description

4,4'-Butylidenebis(6-tert-Butyl-3-Methylphenol) is a high-performance sterically hindered phenolic antioxidant. This compound is valued for its excellent ability to inhibit oxidative degradation and extend the service life of various materials. It is primarily sought after by manufacturers in the polymer, rubber, and lubricant industries for its stabilizing properties.

Application

• Polymer Stabilizer: A key antioxidant for polyolefins (e.g., polyethylene, polypropylene) to prevent thermal and oxidative degradation during processing and end-use.
• Rubber Industry: Used as an antioxidant and antiozonant in synthetic rubbers and elastomers to prevent cracking and maintain elasticity.
• Lubricant & Grease Additive: Functions as an antioxidant in industrial lubricants, transmission fluids, and greases to reduce sludge formation and viscosity increase.
• Adhesive & Sealant Formulations: Enhances the shelf life and thermal stability of hot-melt adhesives and various sealants.
• Fuel & Petroleum Product Stabilizer: Inhibits gum formation and oxidation in fuels and other petroleum-derived products.
• Plasticizer Stabilizer: Protects plasticizers from oxidative degradation, thereby preserving the flexibility of PVC and other plasticized polymers.

Basic Information

Product Name	4,4'-Butylidenebis(6-tert-Butyl-3-Methylphenol)
CAS No.	85-60-9
Molecular Formula	C26H38O2
Molecular Weight	382.58 g/mol
Synonyms	4,4'-Butylidenebis(2-tert-butyl-5-methylphenol); Antioxidant 4426; AO 4426; Bis(2-tert-butyl-5-methyl-4-hydroxyphenyl)methane; 2,2'-Butylidenebis(6-tert-butyl-4-methylphenol); Phenol, 4,4'-butylidenebis[2-(1,1-dimethylethyl)-6-methyl-]; Lowinox 44B25; Santowhite Powder
EINECS	201-618-5

Quality Control

Our production of 4,4'-Butylidenebis(6-tert-Butyl-3-Methylphenol) adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing to ensure it meets precise specifications for purity, color, and melting point. A Certificate of Analysis (COA) documenting these results is provided with each shipment to guarantee consistency and traceability.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). Keep away from heat sources and incompatible materials. The product is light-sensitive (store away from light).

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms
Assay (HPLC)	≥ 98.0 %
Melting Point	208 - 212 °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.