Description

3,9-Bis[1,1-Dimethyl-2-[3-(3-tert-Butyl-4-Hydroxy-5-Methylphenyl)Propionyloxy]Ethyl]-2,4,8,10-Tetraoxaspiro[5.5]Undecane CAS NO 90499-06-2 is a high-performance, sterically hindered phenolic antioxidant belonging to the spirocyclic acetal class. This compound is specifically engineered to provide exceptional long-term thermal and oxidative stability to a wide range of polymeric materials. It is an essential additive for manufacturers seeking to enhance the durability and lifespan of their products under demanding environmental conditions. Key industries that rely on this antioxidant include plastics, synthetic fibers, and specialty elastomers.

Application

This multifunctional antioxidant is utilized across various high-performance material sectors for its superior stabilizing properties.

• Polyolefin Stabilization: Primary application in polypropylene (PP) and polyethylene (PE) to prevent thermal degradation during processing and extend service life.
• Engineering Plastics: Used in polymers like polyamides (PA), polyesters (PBT, PET), and polycarbonate (PC) to maintain mechanical properties and color stability.
• Synthetic Fibers: Incorporated into fiber-grade polymers to protect against thermo-oxidative breakdown during high-temperature spinning and processing.
• Adhesives and Sealants: Enhances the aging resistance of hot-melt and reactive adhesive formulations.
• Elastomers and Rubbers: Provides antioxidant protection in synthetic rubbers such as SBR, EPDM, and NBR, preventing cracking and hardening.
• Polymer Masterbatches: A key component in concentrated additive packages for easy dispersion and consistent performance in final compounds.
• Food Contact Materials: Suitable for use in polymers compliant with relevant food contact regulations (subject to specific grade and regional approval).
• Automotive Components: Protects under-the-hood parts and interior trim made from plastics and elastomers from heat-induced degradation.

Basic Information

Item	Details
Product Name	3,9-Bis[1,1-Dimethyl-2-[3-(3-tert-Butyl-4-Hydroxy-5-Methylphenyl)Propionyloxy]Ethyl]-2,4,8,10-Tetraoxaspiro[5.5]Undecane
CAS No.	90499-06-2
Molecular Formula	C48H66O10
Molecular Weight	803.0 g/mol
Synonyms	Pentaerythritol Tetrakis(3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate) Analog; Spirocyclic Acetal Antioxidant; AO-80; ADK STAB AO-80; Sumilizer GA-80; Irganox 1010 Analog; 2,4,8,10-Tetraoxaspiro[5.5]undecane-3,9-diethanol, β,β,β',β'-tetramethyl-, bis[3-[3-(1,1-dimethylethyl)-4-hydroxy-5-methylphenyl]-1-oxopropoxy] ester; Bis[1,1-dimethyl-2-[3-(3-tert-butyl-4-hydroxy-5-methylphenyl)propionyloxy]ethyl]-2,4,8,10-tetraoxaspiro[5.5]undecane-3,9-diyldiacetate
EINECS	Contact for details

Quality Control

Our production of 3,9-Bis[1,1-Dimethyl-2-[3-(3-tert-Butyl-4-Hydroxy-5-Methylphenyl)Propionyloxy]Ethyl]-2,4,8,10-Tetraoxaspiro[5.5]Undecane adheres to a rigorous quality management system to ensure batch-to-batch consistency and performance reliability. All materials are manufactured and tested against stringent internal specifications, which are aligned with global industry standards. A comprehensive Certificate of Analysis (COA) detailing purity, identity, and key physical parameters is provided with every shipment to support your quality assurance protocols.

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). This product is easily oxidized; for long-term storage, maintaining an inert atmosphere (e.g., under nitrogen) is recommended to preserve efficacy. Keep away from heat sources and incompatible materials.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 98.0 %
Melting Point	120 - 125 °C
Loss on Drying	≤ 0.5 %
Ash Content	≤ 0.1 %
Heavy Metals (as Pb)	≤ 10 ppm
Related Substances (HPLC)	Individual impurity ≤ 0.5%; Total impurities ≤ 2.0%

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