Description

2-(2H-Benzotriazole-2-Yl)-4,6-Di-tert-Octylphenol is a high-performance, hindered phenolic antioxidant and ultraviolet (UV) light absorber belonging to the benzotriazole class. This compound is critical for protecting polymers and coatings from oxidative degradation and UV-induced yellowing, thereby extending product lifespan and maintaining aesthetic properties. It is essential for formulators and manufacturers in the plastics, coatings, and synthetic fiber industries who require reliable long-term stabilization for their products.

Application

• Polymer Stabilization: Primary application as a light stabilizer and antioxidant in polyolefins (PP, PE), PVC, polyurethanes, and engineering plastics to prevent photo-oxidation and thermal degradation.
• Coatings and Paints: Used in automotive, industrial, and architectural coatings to inhibit gloss loss, chalking, and color fading caused by UV exposure.
• Adhesives and Sealants: Enhances the durability and weatherability of adhesive films and sealant formulations exposed to sunlight.
• Synthetic Fibers: Incorporated into fibers like polypropylene and nylon to improve resistance to sunlight degradation during outdoor use.
• Agricultural Films: Protects greenhouse and mulch films from embrittlement and loss of mechanical properties due to prolonged sun exposure.
• Masterbatch Production: A key additive for creating concentrated UV stabilizer and antioxidant masterbatches for easy dispersion in polymer processing.

Basic Information

Product Name	2-(2H-Benzotriazole-2-Yl)-4,6-Di-tert-Octylphenol
CAS No.	70693-49-1
Molecular Formula	C₃₄H₅₂N₃O
Molecular Weight	518.80 g/mol
Synonyms	2-(2H-Benzotriazol-2-yl)-4,6-bis(1,1,3,3-tetramethylbutyl)phenol; UV-329; Tinuvin 329; Bumetrizole; 2-(2'-Hydroxy-3',5'-di-tert-octylphenyl)benzotriazole; Phenol, 2-(2H-benzotriazol-2-yl)-4,6-bis(1,1,3,3-tetramethylbutyl)-; Lowilite 29
EINECS	274-759-5

Quality Control

Our production of 2-(2H-Benzotriazole-2-Yl)-4,6-Di-tert-Octylphenol adheres to stringent quality management protocols to ensure batch-to-batch consistency and high purity. The material is characterized and tested against established internal specifications, which typically include identity confirmation, assay (purity), and control of key impurities. Certificates of Analysis (COA) documenting these results are provided with every shipment to guarantee compliance with your technical 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 (store away from light).

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 98.5%
Melting Point	96 - 102 °C
Loss on Drying	≤ 0.5%
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.