Description

Ethyl 3-(3,5-Di-tert-Butyl-4-Hydroxyphenyl)Propionate is a high-performance hindered phenolic antioxidant widely used to protect polymers and organic materials from oxidative degradation. This compound is valued for its excellent compatibility and low volatility, providing long-term stability to a variety of substrates. It is a critical additive for manufacturers in the plastics, rubber, and synthetic lubricant industries seeking to enhance product durability and shelf life.

Application

• Primary antioxidant in polyolefins (PP, PE, LDPE, HDPE) for films, fibers, and molded articles.
• Stabilizer for engineering plastics, styrenics (PS, ABS, HIPS), and elastomers to prevent chain scission and discoloration.
• Additive in adhesives, sealants, and synthetic lubricants to inhibit oxidation and viscosity increase.
• Stabilizing component in hot-melt adhesives and petroleum-derived waxes.
• Protective agent for rubber goods, including tires and industrial rubber products.
• Used in food-contact polymer applications where compliant grades are available.
• Stabilizer for polyurethane foams and other thermoset polymers.
• Intermediate for the synthesis of higher molecular weight or polymer-bound antioxidants.

Basic Information

Product Name	Ethyl 3-(3,5-Di-tert-Butyl-4-Hydroxyphenyl)Propionate
CAS No.	36294-24-3
Molecular Formula	C20H32O3
Molecular Weight	320.47 g/mol
Synonyms	Ethyl 3-(3,5-Di-tert-butyl-4-hydroxyphenyl)propanoate; Ethyl 3,5-Di-tert-butyl-4-hydroxyhydrocinnamate; Irganox 245; Antioxidant 245; Phenol, 3,5-bis(1,1-dimethylethyl)-4-hydroxy-, 3-(ethoxycarbonyl)propyl derivative; Anox 20; BNX 245; AO-245; Evernox 245
EINECS	252-952-5

Quality Control

Our production of Ethyl 3-(3,5-Di-tert-Butyl-4-Hydroxyphenyl)Propionate adheres to stringent quality management systems to ensure batch-to-batch consistency and high purity. The material is manufactured and tested to meet relevant industry specifications for polymer additives. A comprehensive Certificate of Analysis (COA) detailing purity, identity, and key physical parameters is provided with each 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, sparks, and open flame. Under these conditions, the product has an excellent shelf life.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 98.0 %
Melting Point	76 - 79 °C
Loss on Drying	≤ 0.5 %
Ash Content	≤ 0.1 %
Transmittance (425 nm)	≥ 95 %
Transmittance (500 nm)	≥ 97 %

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