Description

Dimethyl Bis[[3,5-Bis(1,1-Dimethylethyl)-4-Hydroxyphenyl]Methyl]Malonate is a high-performance phenolic antioxidant and light stabilizer, specifically designed to protect polymers from thermal and oxidative degradation. Its molecular structure provides exceptional compatibility and low volatility, making it a critical additive for enhancing the longevity and performance stability of sensitive materials. This compound is essential for manufacturers in the plastics, rubber, and specialty coatings industries who require reliable protection against environmental stressors to ensure product quality and durability.

Application

• Primary antioxidant and light stabilizer for polyolefins (PP, PE) and engineering plastics.
• Stabilizing agent for synthetic rubbers and elastomers to prevent cracking and loss of elasticity.
• Additive in adhesives, sealants, and hot-melt formulations to improve thermal aging resistance.
• Protective component in wire and cable insulation compounds.
• Stabilizer for lubricants and greases to extend service life under high-temperature conditions.
• Used in the production of masterbatches and polymer concentrates for consistent additive dispersion.

Basic Information

Product Name	Dimethyl Bis[[3,5-Bis(1,1-Dimethylethyl)-4-Hydroxyphenyl]Methyl]Malonate
CAS No.	39266-67-6
Molecular Formula	C41H56O8
Molecular Weight	676.89 g/mol
Synonyms	Dimethyl 3,5-di-tert-butyl-4-hydroxybenzylmalonate; Bis(3,5-di-tert-butyl-4-hydroxybenzyl) Malonate; Antioxidant 1790; Irganox 1790; Hostanox O 10; Ethanox 398; 1,1'-(1,1,3,3-Tetramethyl-1,3-disiloxanediyl)bis[3,5-bis(1,1-dimethylethyl)-4-hydroxybenzenepropanoic acid] dimethyl ester; 2,2-Bis[[3,5-bis(1,1-dimethylethyl)-4-hydroxyphenyl]methyl]propanedioic acid dimethyl ester
EINECS	254-416-7

Quality Control

Our production of Dimethyl Bis[[3,5-Bis(1,1-Dimethylethyl)-4-Hydroxyphenyl]Methyl]Malonate adheres to stringent quality management systems to ensure batch-to-batch consistency and high purity. Each lot is analyzed against comprehensive specifications using advanced techniques like HPLC and GC. A Certificate of Analysis (COA) detailing purity, identity, and key physical parameters is provided with every shipment to support your quality assurance protocols.

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. Due to its light-sensitive nature, the container should be opaque or stored in darkness to maintain product efficacy.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to reference spectrum
Assay (HPLC)	≥ 98.0 %
Melting Point	158 - 162 °C
Loss on Drying	≤ 0.5 %
Heavy Metals (as Pb)	≤ 10 ppm

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