Description

2,2'-Methylenebis[4,6-Bis(1,1-Dimethylpropyl)Phenol] is a high-performance sterically hindered phenolic antioxidant, also known as CAS NO 50378-93-3. This compound is critical for preventing oxidative degradation and extending the service life of polymers and other sensitive materials. It is an essential additive for manufacturers in the plastics, rubber, and specialty chemical industries who require reliable thermal and color stability for their products.

Application

• Primary antioxidant and stabilizer in polyolefins (PP, PE) and engineering plastics.
• Key additive in synthetic rubber and elastomer formulations to prevent chain scission and cross-linking.
• Used in adhesives, sealants, and coatings to enhance durability against heat and oxygen.
• Stabilizing agent for lubricants, greases, and transformer oils to inhibit sludge formation.
• Intermediate in the synthesis of other specialty antioxidants and polymer additives.
• Protective additive in food-contact polymer applications, subject to regulatory compliance.

Basic Information

Product Name	2,2'-Methylenebis[4,6-Bis(1,1-Dimethylpropyl)Phenol]
CAS No.	50378-93-3
Molecular Formula	C35H56O2
Molecular Weight	508.82 g/mol
Synonyms	2,2'-Methylenebis(4,6-di-tert-pentylphenol); Bis(3,5-di-tert-pentyl-4-hydroxyphenyl)methane; Antioxidant 4426; Phenol, 2,2'-methylenebis[4,6-bis(1,1-dimethylpropyl)-; Lowinox® 22M46; AO-4426; 4,4'-Methylenebis(2,6-di-tert-pentylphenol)
EINECS	256-597-3

Quality Control

Our production of 2,2'-Methylenebis[4,6-Bis(1,1-Dimethylpropyl)Phenol] adheres to stringent quality management systems. Every batch undergoes rigorous analytical testing, including HPLC for assay and purity, to ensure it meets precise specifications for color, melting point, and impurity profiles. Certificates of Analysis (COA) are provided with each shipment, and we support compliance with relevant global regulatory frameworks.

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, consider an inert atmosphere (e.g., nitrogen blanket) to maintain optimal purity and performance. Keep away from strong oxidizing agents.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms
Assay (HPLC)	≥ 98.0 %
Melting Point	100 - 105 °C
Loss on Drying	≤ 0.5 %
Heavy Metals (as Pb)	≤ 10 ppm
Related Substances (HPLC)	Total impurities ≤ 2.0%

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