Description

4-[(3,5-Di-tert-Butyl-2-Hydroxyphenylthio)Isopropylidenethio]-2,6-Di-tert-Butylphenol is a high-performance phenolic antioxidant and sulfur-containing stabilizer. This compound is engineered to provide exceptional protection against thermal and oxidative degradation in demanding polymer and synthetic material applications. It is a critical additive for manufacturers in the plastics, rubber, and specialty chemical industries seeking to enhance the longevity and performance stability of their products.

Application

• Primary antioxidant and stabilizer for polyolefins (e.g., PP, PE) to prevent thermal degradation during processing.
• Synergistic stabilizer in elastomers and synthetic rubbers, improving resistance to heat aging and flex-cracking.
• Additive in adhesives, sealants, and coatings formulations to maintain viscosity and prevent gelation.
• Stabilizing agent for lubricants and greases, extending their operational life under high-temperature conditions.
• Intermediate in the synthesis of more complex polymer additives and pharmaceutical antioxidants.
• Protective additive for engineering plastics such as polyamides and polyesters exposed to harsh environments.

Basic Information

Product Name	4-[(3,5-Di-tert-Butyl-2-Hydroxyphenylthio)Isopropylidenethio]-2,6-Di-tert-Butylphenol
CAS No.	1391054-68-4
Molecular Formula	C31H46OS2
Molecular Weight	498.82 g/mol
Synonyms	Phenol, 4-[(3,5-bis(1,1-dimethylethyl)-2-hydroxyphenyl)thio]-1,1-dimethylethyl 2,6-bis(1,1-dimethylethyl)phenyl sulfide; 2,6-Di-tert-butyl-4-[(3,5-di-tert-butyl-2-hydroxyphenylthio)isopropylidenethio]phenol; Phenolic thioether antioxidant; Sulfur-bridged bisphenol antioxidant; Antioxidant 1391054-68-4; AO-31S (common trade designation); Bis(3,5-di-tert-butyl-4-hydroxyphenyl) sulfide derivative
EINECS	Contact for details

Quality Control

Our production of 4-[(3,5-Di-tert-Butyl-2-Hydroxyphenylthio)Isopropylidenethio]-2,6-Di-tert-Butylphenol adheres to stringent quality management protocols. Every batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure consistent performance and compliance with customer specifications. Comprehensive Certificates of Analysis (COA) detailing all critical parameters are available upon request.

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 material is easily oxidized and should be stored under an inert atmosphere (e.g., nitrogen) after opening to maintain efficacy. Keep away from strong oxidizing agents.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Melting Point	Contact for details
Loss on Drying	≤ 0.5%
Heavy Metals	≤ 10 ppm

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