Description

Methanone, [5-[[3-(2H-Benzotriazol-2-Yl)-2-Hydroxy-5-(1,1,3,3-Tetramethylbutyl)Phenyl]Methyl]-2-Hydroxy-4-(Octyloxy)Phenyl)Phenyl- is a high-performance, sterically hindered benzotriazole derivative widely recognized as a highly effective ultraviolet (UV) light absorber and stabilizer. Its core value lies in providing exceptional long-term protection to polymers and coatings against photodegradation, thereby extending product lifespan and maintaining aesthetic properties. This compound is essential for formulators and manufacturers in the plastics, coatings, and synthetic materials industries who require premium light stabilization for demanding outdoor applications.

Application

• Polymer Stabilization: Primary use as a UV absorber in engineering plastics (e.g., polycarbonate, polyester, PVC) and polyolefins to prevent yellowing, embrittlement, and loss of mechanical strength.
• High-Performance Coatings: Critical additive in automotive clear coats, industrial coatings, and wood finishes to enhance gloss retention and prevent cracking or peeling caused by sunlight exposure.
• Adhesives and Sealants: Incorporated to improve the weatherability and durability of adhesive films and sealants used in construction and automotive applications.
• Agricultural Films: Used in greenhouse and mulch films to stabilize the polymer matrix against solar UV radiation, extending functional service life.
• Synthetic Fibers and Textiles: Applied to protect fibers like polyamide and polyester from UV-induced degradation, preserving color and strength in outdoor fabrics.
• Advanced Material Formulations: Serves as a key component in stabilization packages for composites and other specialty materials requiring enhanced outdoor performance.

Basic Information

Item	Details
Product Name	Methanone, [5-[[3-(2H-Benzotriazol-2-Yl)-2-Hydroxy-5-(1,1,3,3-Tetramethylbutyl)Phenyl]Methyl]-2-Hydroxy-4-(Octyloxy)Phenyl)Phenyl-
CAS No.	162245-07-0
Molecular Formula	C39H45N3O4
Molecular Weight	619.80 g/mol
Synonyms	2-(2-Hydroxy-5-octyloxyphenyl)-2H-benzotriazole; UV-329; 2-(2'-Hydroxy-5'-octyloxyphenyl)benzotriazole; Octrizole; 2-(2H-Benzotriazol-2-yl)-4-(octyloxy)-6-(1,1,3,3-tetramethylbutyl)phenol; Bumetrizole; Light stabilizer 329
EINECS	Contact for details

Quality Control

Our production of this UV absorber adheres to strict quality management systems to ensure batch-to-batch consistency and high purity. Quality is verified through a comprehensive suite of analytical techniques including HPLC, GC, and spectroscopic methods. A Certificate of Analysis (COA) detailing purity, identity, and specific parameters is provided with each shipment to support your quality assurance protocols.

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 bases and incompatible materials. The product is stable under recommended conditions.

Specification

Item	Specification
Appearance	Light yellow to white crystalline powder
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 98.5%
Melting Point	101 - 106 °C
Loss on Drying	≤ 0.5%
Ash Content	≤ 0.1%
Transmittance	≥ 95% (425 nm) ≥ 97% (500 nm)

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