Description

Ethyl 3,5-Di-tert-Butyl-4-Hydroxybenzoate is a high-performance hindered phenolic antioxidant and UV stabilizer. This compound is valued for its ability to inhibit oxidative degradation and provide light stability to a wide range of polymers and synthetic materials. It is essential for manufacturers in the plastics, rubber, coatings, and adhesives industries seeking to enhance the longevity and performance of their products under demanding environmental conditions.

Application

• Polymer Stabilization: Primary antioxidant for polyolefins (PP, PE), PVC, polyurethanes, and engineering plastics to prevent thermal and oxidative degradation during processing and end-use.
• Rubber Industry: Protects synthetic rubbers and elastomers from aging, maintaining elasticity and mechanical properties.
• Coatings and Inks: UV stabilizer and antioxidant in industrial coatings, automotive paints, and printing inks to prevent yellowing and loss of gloss.
• Adhesives and Sealants: Extends service life by preventing oxidative cross-linking or chain scission that leads to embrittlement.
• Lubricant and Fuel Additive: Acts as an antioxidant in synthetic lubricants, greases, and fuels to inhibit sludge formation and viscosity increase.
• Intermediate for Synthesis: Used in the production of more complex hindered phenol antioxidants and light stabilizers.

Basic Information

Product Name	Ethyl 3,5-Di-tert-Butyl-4-Hydroxybenzoate
CAS No.	1620-64-0
Molecular Formula	C17H26O3
Molecular Weight	278.39 g/mol
Synonyms	Ethyl 4-Hydroxy-3,5-di-tert-butylbenzoate; Benzoic acid, 4-hydroxy-3,5-bis(1,1-dimethylethyl)-, ethyl ester; 3,5-Di-tert-butyl-4-hydroxybenzoic acid ethyl ester; Antioxidant 1222; AO 1222; Ethyl 3,5-bis(tert-butyl)-4-hydroxybenzoate; 4-Hydroxy-3,5-di-tert-butylbenzoic Acid Ethyl Ester
EINECS	216-598-6

Quality Control

Our Ethyl 3,5-Di-tert-Butyl-4-Hydroxybenzoate is manufactured under a strict quality management system. Every batch is subjected to rigorous analytical testing, including HPLC for assay and purity, to ensure it meets the high standards required for industrial applications. A comprehensive Certificate of Analysis (COA) detailing identity, purity, and physical specifications is provided with each shipment to guarantee consistency and traceability.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). Keep away from heat sources and incompatible materials. The product is light-sensitive and should be stored away from direct light exposure.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Melting Point	122°C - 126°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.