Description

Dioctadecyl3-Methyl-4-Hydroxy-5-tert-Butyl-Benzylmalonate is a high-performance hindered phenolic antioxidant and light stabilizer. This compound is valued for its ability to effectively inhibit oxidative degradation and extend the service life of polymeric materials. It is primarily needed by manufacturers in the plastics, rubber, and coatings industries seeking to enhance the durability and color stability of their products under demanding environmental conditions.

Application

• Primary antioxidant and light stabilizer for polyolefins such as polypropylene (PP) and polyethylene (PE).
• Stabilizing agent for engineering plastics and synthetic rubbers to prevent thermal and UV-induced degradation.
• Additive in adhesives and sealants to maintain performance integrity over time.
• Protective component in industrial lubricants and greases to reduce oxidation.
• Stabilizer for polymer emulsions and coatings to prevent yellowing and embrittlement.
• Used in the formulation of fiber and film products requiring long-term weatherability.

Basic Information

Item	Detail
Product Name	Dioctadecyl3-Methyl-4-Hydroxy-5-tert-Butyl-Benzylmalonate
CAS No.	20297-71-6
Molecular Formula	C58H100O5
Molecular Weight	877.4 g/mol
Synonyms	Distearyl 3-Methyl-4-hydroxy-5-tert-butylbenzylmalonate; Dioctadecyl 3-Methyl-4-hydroxy-5-tert-butylbenzylmalonate; 3-Methyl-4-hydroxy-5-tert-butylbenzylmalonic Acid Dioctadecyl Ester; Irganox 1425; Antioxidant 1425; Bis(octadecyl) 3-Methyl-4-hydroxy-5-tert-butylbenzylmalonate; Hostanox OSP 1; BNX 1425
EINECS	Contact for details

Quality Control

Our production of Dioctadecyl3-Methyl-4-Hydroxy-5-tert-Butyl-Benzylmalonate adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing to ensure it meets precise specifications for purity and performance. Certificates of Analysis (COA) documenting identity, assay, and impurity profiles are available upon request to support your quality assurance and regulatory compliance needs.

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 easily oxidized; for long-term storage, maintaining an inert atmosphere (e.g., under nitrogen) is recommended to preserve efficacy. Keep away from strong oxidizing agents.

Specification

Item	Specification
Appearance	White to off-white powder or flakes
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 98.0 %
Melting Point	50 - 55 °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.