Description

Antioxidant 1790 is a high-performance, sterically hindered phenolic antioxidant widely recognized for its exceptional efficacy in protecting polymers from thermal and oxidative degradation. This compound is critical for extending the service life and maintaining the mechanical properties of sensitive materials under demanding conditions. It is an essential additive for manufacturers in the plastics, synthetic fiber, and rubber industries seeking to enhance product durability and performance stability.

Application

• Primary stabilizer for polypropylene (PP) and polyethylene (PE) against long-term thermal aging.
• Effective antioxidant in engineering plastics such as polyamides (PA) and polyesters (PBT, PET).
• Stabilization of synthetic fibers and elastomers to prevent discoloration and embrittlement.
• Used in adhesives and sealants formulations to improve shelf-life and performance consistency.
• Protective additive for hydrocarbon-based fluids and lubricants.
• Synergistic use with other stabilizers like phosphites and thioesters in advanced polymer stabilization packages.

Basic Information

Product Name	Antioxidant 1790
CAS No.	40601-76-1
Molecular Formula	C41H57NO3
Molecular Weight	611.9 g/mol
Synonyms	1,3,5-Trimethyl-2,4,6-tris(3,5-di-tert-butyl-4-hydroxybenzyl)benzene; Tris(3,5-di-tert-butyl-4-hydroxybenzyl)-1,3,5-trimethyl-2,4,6-triethylbenzene; Antioxidant 330 (related but distinct); Ethanox 330 (common trade name); AO 1790; 3,5-Di-tert-butyl-4-hydroxyhydrocinnamic acid, 1,3,5-tris(3,5-di-tert-butyl-4-hydroxybenzyl)-2,4,6-trimethylbenzene ester; Tris(3,5-di-tert-butyl-4-hydroxybenzyl)mesitylene
EINECS	254-995-6

Quality Control

Our Antioxidant 1790 is manufactured under a stringent quality management system. Every batch is tested to ensure it meets high-purity standards suitable for demanding polymer applications. A comprehensive Certificate of Analysis (COA) detailing purity, identity, and key physical parameters is provided with each shipment to guarantee traceability and consistency.

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. The product is light-sensitive and should be stored away from light to maintain efficacy.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 98.0%
Melting Point	240 - 245 °C
Volatile Matter	≤ 0.5%
Ash Content	≤ 0.1%

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