Description

Ethylene Bis[3,3-Bis(3-tert-Butyl-4-Hydroxyphenyl)Butyrate] is a high-performance, sterically hindered phenolic antioxidant. This compound matters for its exceptional ability to inhibit oxidative degradation, thereby extending the service life and maintaining the properties of sensitive materials. It is primarily needed by manufacturers in the polymer and plastics industries seeking to protect their products from thermal and oxidative stress during processing and long-term use.

Application

• Primary antioxidant for polyolefins such as polyethylene (PE) and polypropylene (PP).
• Stabilizer in engineering plastics including polyamides (nylon), polyesters (PET, PBT), and styrenics (ABS, HIPS).
• Additive for synthetic fibers and elastomers to prevent chain scission and embrittlement.
• Protective agent in adhesives, sealants, and coatings to enhance durability.
• Stabilizing component in hot-melt adhesives and polymer masterbatches.
• Used in food-contact compliant polymer applications where regulatory approval is met.

Basic Information

Item	Details
Product Name	Ethylene Bis[3,3-Bis(3-tert-Butyl-4-Hydroxyphenyl)Butyrate]
CAS No.	32509-66-3
Molecular Formula	C58H82O8
Molecular Weight	907.27 g/mol
Synonyms	Ethyl 702; Irganox 129; Antioxidant 129; 1,2-Bis[3,3-bis(4-hydroxy-3-tert-butylphenyl)butanoyloxy]ethane; Bis[3,3-bis(4-hydroxy-3-tert-butylphenyl)butyric acid] ethylene ester; 2,2'-Ethylidenebis(4,6-di-tert-butylphenol) ester; AO-129
EINECS	251-067-9

Quality Control

Our Ethylene Bis[3,3-Bis(3-tert-Butyl-4-Hydroxyphenyl)Butyrate] is produced under a stringent quality management system. Each batch undergoes rigorous analytical testing to ensure it meets precise specifications for identity, purity, and performance. Certificates of Analysis (COA) documenting key parameters are available upon request to support your quality assurance and regulatory compliance needs.

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. Under these conditions, the product remains stable for extended periods.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 98.0 %
Melting Point	160 - 165 °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.