Description

2,2'-Thiodi(4-tert-Octylphenol) is a sterically hindered phenolic antioxidant. This compound matters because it effectively inhibits oxidative degradation by scavenging free radicals, thereby extending the service life and stability of various materials. It is primarily needed by manufacturers in the polymer, lubricant, and fuel industries seeking to protect their products from thermal and oxidative breakdown.

Application

• Primary antioxidant in polyolefins (e.g., polyethylene, polypropylene) for films, fibers, and molded articles.
• Stabilizer for lubricating oils, greases, and industrial fluids to prevent viscosity increase and sludge formation.
• Additive in fuels and biofuels to improve oxidation stability and storage life.
• Stabilizing component in adhesive and sealant formulations.
• Protective agent for elastomers and rubber products against heat aging.
• Intermediate in the synthesis of more complex polymer additives and stabilizers.

Basic Information

Product Name	2,2'-Thiodi(4-tert-Octylphenol)
CAS No.	3294-03-9
Molecular Formula	C₂₈H₄₂O₂S
Molecular Weight	442.70 g/mol
Synonyms	2,2'-Thiobis(4-tert-octylphenol); 4,4'-Thiobis(2-tert-octylphenol); Phenol, 4,4'-thiobis[2-(1,1,3,3-tetramethylbutyl)-; Antioxidant 300; AO 300; Bis(4-tert-octyl-2-hydroxyphenyl) sulfide; Ethanox 330 (trade name); Irganox 1081 (trade name)
EINECS	221-965-6

Quality Control

Our production of 2,2'-Thiodi(4-tert-Octylphenol) adheres to stringent quality management protocols. Every batch undergoes rigorous analytical testing to ensure it meets precise purity and performance specifications. A comprehensive Certificate of Analysis (COA) detailing assay, identity, and impurity profiles is provided with each shipment to guarantee consistency and reliability for your formulations.

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 material is light-sensitive and easily oxidized; prolonged exposure to air and light should be avoided to maintain efficacy. For long-term storage, consider an inert atmosphere (e.g., nitrogen).

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0 %
Melting Point	90 - 95 °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.