Description

2-(2H-Benzotriazol-2-Yl)-4,6-Ditertpentylphenol is a high-performance benzotriazole derivative widely recognized for its exceptional ability to absorb ultraviolet light. This compound is crucial for protecting materials from UV-induced degradation, thereby extending their service life and maintaining their aesthetic and functional properties. It is an essential additive for formulators and manufacturers in the polymer, coatings, and specialty chemical industries seeking reliable light stabilization solutions.

Application

• Polymer Stabilization: A primary UV absorber for polyolefins (PP, PE), PVC, polycarbonates, and engineering plastics to prevent yellowing, embrittlement, and loss of mechanical strength.
• Coatings and Paints: Incorporated into automotive, industrial, and wood coatings to protect the underlying substrate and maintain color and gloss.
• Adhesives and Sealants: Used to enhance the weatherability and durability of adhesive films and sealant formulations exposed to sunlight.
• Automotive Components: Protects interior and exterior plastic parts, such as dashboards, bumpers, and trim, from UV radiation.
• Agricultural Films: Extends the functional lifespan of greenhouse and mulch films by mitigating solar degradation.
• Specialty Chemical Intermediates: Serves as a key building block or additive in the synthesis of advanced light-stabilizing systems and other functional chemicals.

Basic Information

Product Name	2-(2H-Benzotriazol-2-Yl)-4,6-Ditertpentylphenol
CAS No.	25973-55-1
Molecular Formula	C22H29N3O
Molecular Weight	351.49 g/mol
Synonyms	2-(2H-Benzotriazol-2-yl)-4,6-di-tert-pentylphenol; UV-328; Tinuvin 328; BZT-328; 2-(2'-Hydroxy-3',5'-di-tert-pentylphenyl)benzotriazole; 2-(2H-Benzotriazol-2-yl)-4,6-bis(1-methyl-1-phenylethyl)phenol; Lowilite 28; 2-(2H-1,2,3-Benzotriazol-2-yl)-4,6-bis(1,1-dimethylpropyl)phenol
EINECS	247-384-8

Quality Control

Our 2-(2H-Benzotriazol-2-Yl)-4,6-Ditertpentylphenol is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing to ensure it meets precise specifications for identity, purity, and performance. A comprehensive Certificate of Analysis (COA) detailing assay, melting point, UV absorbance, and impurity profiles is provided to guarantee consistency and compliance with your formulation requirements.

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 direct light exposure.

Specification

Item	Specification
Appearance	Light yellow to white crystalline powder
Identification (IR)	Conforms to standard
Melting Point	80 - 86 °C
Assay (HPLC)	≥ 98.5 %
Loss on Drying	≤ 0.5 %
Transmittance	≥ 95% (425 nm) ≥ 97% (500 nm)
Ash Content	≤ 0.1 %

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