Description

6,6'-(2-Methylpropylidene)Bis[2,3-Dihydro-1,1,3,3-Tetramethyl-1H-Inden-5-Ol] is a high-purity hindered phenolic antioxidant, a critical component for stabilizing polymers and organic materials against oxidative degradation. Its molecular structure provides exceptional performance as a free radical scavenger, significantly extending the service life and maintaining the physical properties of sensitive formulations. This compound is essential for manufacturers in the polymer, specialty chemical, and lubricant industries seeking reliable, high-performance stabilization solutions.

Application

• Polymer Stabilization: Primary antioxidant for polyolefins (PP, PE), engineering plastics, and synthetic rubbers to prevent thermal and oxidative degradation during processing and end-use.
• Lubricant & Fuel Additive: Used in synthetic lubricants, greases, and industrial oils to inhibit oxidation, reduce sludge formation, and extend fluid life.
• Adhesive & Sealant Formulations: Protects moisture-curing and reactive adhesive systems from premature gelation and loss of tack, ensuring shelf-life stability.
• Coating Resins: Stabilizer for acrylic, alkyd, and polyurethane coating systems to prevent yellowing and embrittlement caused by UV and thermal exposure.
• Elastomer Production: Critical for stabilizing synthetic elastomers like EPDM and SBR during compounding and vulcanization, maintaining elasticity and tensile strength.
• Specialty Chemical Intermediate: Serves as a key building block for synthesizing more complex, high-molecular-weight antioxidant systems.

Basic Information

Product Name	6,6'-(2-Methylpropylidene)Bis[2,3-Dihydro-1,1,3,3-Tetramethyl-1H-Inden-5-Ol]
CAS No.	54661-54-0
Molecular Formula	C33H48O2
Molecular Weight	476.74 g/mol
Synonyms	Bis(2,3-dihydro-1,1,3,3-tetramethyl-1H-inden-5-ol)(2-methylpropylidene); 2,2'-Isopropylidenebis(1,1,3,3-tetramethyl-2,3-dihydro-1H-inden-5-ol); Antioxidant 702; Phenolic Antioxidant 702; Low Volatility Hindered Phenol; AO-702; 5,5'-(2-Methylpropylidene)bis(1,1,3,3-tetramethyl-2,3-dihydro-1H-inden-6-ol) (alternate numbering)
EINECS	Contact for details

Quality Control

Our production of 6,6'-(2-Methylpropylidene)Bis[2,3-Dihydro-1,1,3,3-Tetramethyl-1H-Inden-5-Ol] adheres to a stringent quality management system. Every batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure it meets precise specifications for color, melting point, and assay. Certificates of Analysis (COA) documenting all critical parameters are provided with each shipment to guarantee traceability and compliance with your quality standards.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). Due to its sensitivity to oxidation, it is recommended to store under an inert atmosphere (e.g., nitrogen) for long-term preservation. Keep away from heat, sparks, and open flame.

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)	≤ 10 ppm
Residue on Ignition	≤ 0.1%

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