Description

S,S-Bis[[4-(1,1-Dimethylethyl)-3-Hydroxy-2,6-Dimethylphenyl]Methyl] Terephthalate is a high-performance phenolic antioxidant and light stabilizer, recognized for its superior efficacy in protecting polymers from thermal and oxidative degradation. This compound matters for its ability to significantly extend the service life and maintain the physical properties of sensitive materials exposed to harsh environmental conditions. It is primarily needed by manufacturers in the polymer and plastics industries, particularly for stabilizing high-value engineering resins, synthetic fibers, and elastomers where long-term durability is critical.

Application

• Primary antioxidant and light stabilizer for polyolefins (PP, HDPE, LDPE) to prevent chain scission and discoloration.
• Thermal stabilizer for engineering plastics such as polyamides (nylons), polyesters (PET, PBT), and polycarbonates.
• Additive in synthetic fibers and films to enhance weatherability and UV resistance.
• Stabilizing component in hot-melt adhesives and elastomers to maintain performance at elevated processing temperatures.
• Used in lubricant and grease formulations to inhibit oxidation and viscosity change.
• Protective additive for coating resins to prevent yellowing and embrittlement from UV exposure.

Basic Information

Product Name	S,S-Bis[[4-(1,1-Dimethylethyl)-3-Hydroxy-2,6-Dimethylphenyl]Methyl] Terephthalate
CAS No.	32657-12-8
Molecular Formula	C42H50O6
Molecular Weight	650.85 g/mol
Synonyms	Bis(3,5-di-tert-butyl-4-hydroxybenzyl) Terephthalate; 1,4-Benzenedicarboxylic Acid, Bis[[3,5-Bis(1,1-Dimethylethyl)-4-Hydroxyphenyl]Methyl] Ester; Antioxidant 3125; Irganox 3125; Lowinox 22M46; AO-3125; Phenolic Antioxidant 3125; Terephthalic Acid Bis(3,5-di-tert-butyl-4-hydroxybenzyl) Ester
EINECS	Contact for details

Quality Control

Our production of S,S-Bis[[4-(1,1-Dimethylethyl)-3-Hydroxy-2,6-Dimethylphenyl]Methyl] Terephthalate adheres to stringent quality management protocols. Every batch undergoes rigorous analytical testing to ensure compliance with industry specifications for purity and performance. Certificates of Analysis (COA) detailing assay, impurity profile, and physical properties are available upon request to support your quality assurance and regulatory needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at a controlled room temperature (15-25°C). This material is easily oxidized; for long-term storage, maintaining an inert atmosphere (e.g., under nitrogen) is recommended to preserve efficacy. 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	188 - 192 °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.