Description

6,6'-Methylenebis[1,1,3,3-Tetramethylindan-5-Ol] is a high-purity hindered phenolic antioxidant, valued for its exceptional ability to inhibit oxidative degradation in polymers and other sensitive materials. Its molecular structure provides superior thermal stability and low volatility, making it a critical additive for extending the service life and maintaining the performance of high-temperature processed materials. This compound is essential for manufacturers in the plastics, rubber, and specialty chemical industries seeking reliable, long-term stabilization solutions.

Application

• Polymer Stabilization: Primary antioxidant for polyolefins (PP, PE), engineering plastics, and synthetic rubbers to prevent thermal-oxidative degradation during processing and end-use.
• Lubricant & Fuel Additive: Used in formulating high-performance lubricating oils, greases, and fuels to enhance oxidative stability and reduce sludge formation.
• Adhesive & Sealant Formulations: Imparts aging resistance and maintains the flexibility and adhesive properties of hot-melt and reactive adhesives.
• Elastomer Protection: Critical for stabilizing synthetic elastomers like SBR, BR, and NBR against heat and oxygen-induced cracking and hardening.
• Coating Resins: Protects acrylic, alkyd, and other coating resins from yellowing and embrittlement caused by oxidation.
• Specialty Chemical Intermediate: Serves as a key building block for synthesizing more complex antioxidant and UV stabilizer molecules.

Basic Information

Product Name	6,6'-Methylenebis[1,1,3,3-Tetramethylindan-5-Ol]
CAS No.	54661-53-9
Molecular Formula	C29H40O2
Molecular Weight	420.63 g/mol
Synonyms	Methylenebis(1,1,3,3-tetramethylindan-5-ol); Bis(1,1,3,3-tetramethyl-5-indanol)methane; Antioxidant 754; Ethanox 754; Lowinox 44B25; AO-754; 5,5'-Methylenebis(1,1,3,3-tetramethylindan-5-ol); Phenol, 6,6'-methylenebis[1,1,3,3-tetramethylindan-5-ol]
EINECS	259-313-5

Quality Control

Our production of 6,6'-Methylenebis[1,1,3,3-Tetramethylindan-5-Ol] adheres to stringent quality management protocols to ensure batch-to-batch consistency and high purity. Each lot is subjected to comprehensive analytical testing, including HPLC for assay and impurity profiling. A Certificate of Analysis (COA) detailing all specification results is provided with every shipment to guarantee compliance with your technical requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). Keep away from heat sources and incompatible materials. Under these conditions, the product remains stable for extended periods.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to reference spectrum
Assay (HPLC)	≥ 98.5%
Melting Point	118 - 122 °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.