Description

2-(2H-Benzotriazol-2-Yl)-6-[[3-(1,1-Dimethylethyl)-2-Hydroxy-5- Methylphenyl]Methyl]-4-(1,1,3,3-Tetramethylbutyl)Phenol is a high-performance, sterically hindered phenolic benzotriazole derivative that functions as a highly effective light stabilizer. Its primary value lies in its exceptional ability to absorb and dissipate harmful UV radiation, thereby preventing polymer degradation, color fading, and loss of mechanical properties. This compound is critically needed by manufacturers in the plastics, coatings, and synthetic fiber industries seeking to enhance the long-term durability and weatherability of their products.

Application

• Polymer Stabilization: A key additive in polyolefins (PP, PE), polycarbonates, polyesters (PET, PBT), and engineering plastics to prevent UV-induced chain scission and embrittlement.
• Protective Coatings: Used in automotive clear coats, industrial paints, wood varnishes, and architectural coatings to maintain gloss, prevent chalking, and extend coating life.
• Automotive Components: Incorporated into exterior plastic parts, interior trim, and synthetic leather to ensure color stability and material integrity under sunlight exposure.
• Packaging Films: Enhances the UV resistance of films used for food packaging, agricultural films, and specialty laminates, protecting contents and material properties.
• Adhesives and Sealants: Improves the long-term performance and resistance to environmental aging of high-performance adhesives and construction sealants.
• Synthetic Fibers and Textiles: Applied to fibers like polyamide and acrylic to prevent strength loss and color change in outdoor applications such as awnings and outdoor furniture.

Basic Information

Item	Information
Product Name	2-(2H-Benzotriazol-2-Yl)-6-[[3-(1,1-Dimethylethyl)-2-Hydroxy-5- Methylphenyl]Methyl]-4-(1,1,3,3-Tetramethylbutyl)Phenol
CAS No.	209324-18-5
Molecular Formula	C41H50N4O2
Molecular Weight	630.87 g/mol
Synonyms	Tinuvin 928; 2-(2H-Benzotriazol-2-yl)-6-(1-methyl-1-phenylethyl)-4-(1,1,3,3-tetramethylbutyl)phenol (related isomer); Phenol, 2-(2H-benzotriazol-2-yl)-6-[[3-(1,1-dimethylethyl)-2-hydroxy-5-methylphenyl]methyl]-4-(1,1,3,3-tetramethylbutyl)-; UV-928; Light Stabilizer 928; Bis(1,2,2,6,6-pentamethyl-4-piperidyl) sebacate + Methyl 1,2,2,6,6-pentamethyl-4-piperidyl sebacate (common blend component); Benzotriazole UV Absorber 928
EINECS	Contact for details

Quality Control

Our 2-(2H-Benzotriazol-2-Yl)-6-[[3-(1,1-Dimethylethyl)-2-Hydroxy-5- Methylphenyl]Methyl]-4-(1,1,3,3-Tetramethylbutyl)Phenol is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing to ensure high purity, consistent performance, and compliance with industry specifications. Comprehensive Certificates of Analysis (COA) detailing purity, identity, and key physical parameters are available upon request to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at room temperature (15-25°C). Due to its hygroscopic nature, the container must be kept tightly sealed to minimize exposure to atmospheric moisture. Keep away from incompatible materials such as strong oxidizing agents.

Specification

Item	Specification
Appearance	Off-white to light yellow powder
Identification (IR)	Conforms to reference spectrum
Assay (HPLC)	≥ 98.0%
Melting Point	Contact for details
Loss on Drying	≤ 0.5%
Ash Content	≤ 0.1%
Transmittance	425 nm: ≥ 97.0%; 500 nm: ≥ 98.0%

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