Description

2-(2'-Hydroxy-3',5'-Dipentylphenyl)Benzotriazole is a high-performance, light-stable benzotriazole derivative widely used as an ultraviolet (UV) light absorber. This compound is critical for protecting materials from photodegradation, thereby extending their service life and maintaining their physical and aesthetic properties. It is an essential additive for manufacturers in the polymer, coatings, and specialty chemical industries seeking to enhance the durability of their products against UV radiation.

Application

This UV absorber is utilized across various industries where protection from ultraviolet light is paramount. Its primary applications include:

• Polymer Stabilization: As a key additive in plastics (e.g., polyolefins, PVC, engineering plastics) and synthetic fibers to prevent yellowing, embrittlement, and loss of mechanical strength caused by UV exposure.
• Coatings and Paints: Incorporated into automotive, industrial, and architectural coatings to protect the underlying substrate and prevent gloss loss, chalking, and color fading.
• Adhesives and Sealants: Used to maintain the integrity and adhesive performance of products that are exposed to sunlight.
• Specialty Chemical Intermediates: Serves as a building block or additive in the formulation of advanced materials requiring enhanced light stability.

Basic Information

Product Name	2-(2'-Hydroxy-3',5'-Dipentylphenyl)Benzotriazole
CAS No.	21615-49-6
Molecular Formula	C24H33N3O
Molecular Weight	379.54 g/mol
Synonyms	UV-328; Tinuvin 328; 2-(2H-Benzotriazol-2-yl)-4,6-dipentylphenol; 2-(2'-Hydroxy-3',5'-di-tert-pentylphenyl)benzotriazole; 2-(2H-Benzotriazol-2-yl)-4,6-bis(1-methylbutyl)phenol; Bumetrizole; Norbloc 7966; Lowilite 28
EINECS	244-492-7

Quality Control

Our 2-(2'-Hydroxy-3',5'-Dipentylphenyl)Benzotriazole is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing to ensure it meets high-purity standards and consistent performance as a UV absorber. A comprehensive Certificate of Analysis (COA) detailing purity, identity, and key physical parameters is provided with each shipment to guarantee traceability and compliance.

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. Due to its light-sensitive nature, prolonged exposure to direct light should be avoided even during handling.

Specification

Item	Specification
Appearance	Light yellow to off-white powder or crystals
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 98.5%
Melting Point	80 - 85 °C
Loss on Drying	≤ 0.5%
Ash Content	≤ 0.1%

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