Description

3,5-Bis-(3,5-Di-tert-Butyl-4-Hydroxybenzyl)-Mesitol is a high-performance, sterically hindered phenolic antioxidant. This compound is valued for its exceptional ability to inhibit oxidative degradation, thereby extending the service life and maintaining the properties of sensitive materials. It is a critical additive for manufacturers in the polymer, rubber, and specialty chemical industries who require reliable protection against thermal and oxidative stress.

Application

• Polymer Stabilization: Primary antioxidant for polyolefins (PP, PE), engineering plastics, and synthetic rubbers to prevent chain scission and cross-linking during processing and end-use.
• Rubber Industry: Protects synthetic elastomers like SBR, BR, and NBR from heat aging and oxygen-induced cracking, preserving elasticity and tensile strength.
• Adhesives & Sealants: Enhances the shelf-life and durability of hot-melt, pressure-sensitive, and structural adhesives by preventing resin oxidation.
• Lubricants & Fuels: Used as an antioxidant additive in industrial lubricants, greases, and fuels to reduce sludge formation and viscosity increase.
• Coating Resins: Stabilizes alkyd, acrylic, and other coating resins against yellowing and embrittlement caused by atmospheric oxidation.
• Masterbatch Production: A key active component in antioxidant and stabilizer concentrates for easy dispersion in polymer matrices.

Basic Information

Product Name	3,5-Bis-(3,5-Di-tert-Butyl-4-Hydroxybenzyl)-Mesitol
CAS No.	87113-78-8
Molecular Formula	C48H66O3
Molecular Weight	691.0 g/mol
Synonyms	3,5-Bis(3,5-di-tert-butyl-4-hydroxybenzyl)mesitol; Antioxidant 1790; 1,3,5-Trimethyl-2,4,6-tris(3,5-di-tert-butyl-4-hydroxybenzyl)benzene; Tris(3,5-di-tert-butyl-4-hydroxybenzyl)mesitylene; 2,4,6-Tris(3,5-di-tert-butyl-4-hydroxybenzyl)mesitylene; AO-1790; CAS 87113-78-8
EINECS	Contact for details

Quality Control

Our production of 3,5-Bis-(3,5-Di-tert-Butyl-4-Hydroxybenzyl)-Mesitol adheres to stringent quality management protocols. Every batch is analyzed to ensure it meets precise specifications for purity, melting point, and phenolic content. Certificates of Analysis (COA) documenting these results are provided to guarantee traceability and compliance with your quality standards.

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 product is easily oxidized; for long-term storage, maintaining an inert atmosphere (e.g., under nitrogen) is recommended to preserve efficacy.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms
Melting Point	221 - 225 °C
Assay (HPLC)	≥ 98.0 %
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.