Description

2-(2H-Benzotriazol-2-Yl)-4,6-Bis(tert-Pentyl)Phenol n-Oxide is a high-performance, sterically hindered benzotriazole derivative designed for superior light stabilization. This compound matters because it provides exceptional long-term protection against UV degradation, extending the service life and maintaining the aesthetic and mechanical properties of sensitive materials. It is essential for formulators and manufacturers in the polymer and coatings industries who require reliable UV absorbers for demanding applications.

Application

• Primary use as a light stabilizer (UV absorber) in engineering plastics and high-performance polymers.
• Protection of industrial coatings, automotive paints, and wood finishes from yellowing and gloss loss.
• Enhancing the weatherability of polyolefins (PP, PE), polycarbonates, and polyurethanes.
• Stabilization of adhesives, sealants, and synthetic fibers against photochemical degradation.
• Use in agricultural films to prevent premature breakdown from sunlight exposure.
• Formulation additive for cosmetic and personal care products requiring UV protection.

Basic Information

Product Name	2-(2H-Benzotriazol-2-Yl)-4,6-Bis(tert-Pentyl)Phenol n-Oxide
CAS No.	94109-79-2
Molecular Formula	C22H29N3O2
Molecular Weight	367.49 g/mol
Synonyms	2-(2H-Benzotriazol-2-yl)-4,6-di-tert-pentylphenol oxide; Phenol, 2-(2H-benzotriazol-2-yl)-4,6-bis(1,1-dimethylpropyl)-, N-oxide; UV-328 N-Oxide; 2-(2H-Benzotriazol-2-yl)-4,6-di-tert-amylphenol oxide; 2-(2H-1,2,3-Benzotriazol-2-yl)-4,6-bis(2-methylbutan-2-yl)phenol oxide; Light stabilizer 328 N-Oxide; Benzotriazole UV absorber derivative
EINECS	Contact for details

Quality Control

Our production of 2-(2H-Benzotriazol-2-Yl)-4,6-Bis(tert-Pentyl)Phenol n-Oxide adheres to stringent quality management protocols. Every batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure consistency and compliance with industry specifications. A comprehensive Certificate of Analysis (COA) detailing all test results is provided with each shipment to guarantee traceability and quality assurance for our global B2B clients.

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 strong oxidizing agents and incompatible materials. The container should be kept tightly sealed to minimize exposure to moisture.

Specification

Item	Specification
Appearance	Light yellow to off-white powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.5%
Melting Point	138°C - 145°C
Loss on Drying	≤ 0.5%
Residue on Ignition	≤ 0.1%

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