Description

2-(5-tert-Butyl-2-Hydroxyphenyl)Benzotriazole is a highly effective ultraviolet (UV) light absorber belonging to the hydroxyphenyl benzotriazole class. This compound matters for its exceptional ability to protect polymers and coatings from photodegradation, thereby extending product lifespan and maintaining appearance. It is primarily needed by manufacturers in the plastics, coatings, adhesives, and synthetic fiber industries seeking to enhance the weatherability and durability of their formulations.

Application

• Primary UV stabilizer for polyolefins (PP, PE), PVC, polycarbonates, and other engineering plastics.
• Critical additive in protective coatings and paints for automotive, industrial, and architectural applications to prevent yellowing and gloss loss.
• Enhances the lightfastness of adhesives, sealants, and synthetic fibers like polypropylene.
• Used in the stabilization of agricultural films to prolong their functional life under intense sunlight.
• Formulation component for personal care products (e.g., sunscreens) requiring broad-spectrum UV-A/UV-B absorption, subject to regulatory approval.
• Protective agent in packaging materials to prevent UV-induced degradation of contents.

Basic Information

Product Name	2-(5-tert-Butyl-2-Hydroxyphenyl)Benzotriazole
CAS No.	3147-76-0
Molecular Formula	C₁₆H₁₇N₃O
Molecular Weight	267.33 g/mol
Synonyms	2-(2H-Benzotriazol-2-yl)-4-(1,1-dimethylethyl)phenol; 2-(2'-Hydroxy-5'-tert-butylphenyl)benzotriazole; UV-320; Bumetrizole; Tinuvin 320; BZT-5; 5-tert-Butyl-2-(2H-benzotriazol-2-yl)phenol; 2-(5-tert-Butyl-2-hydroxyphenyl)-2H-benzotriazole
EINECS	221-573-5

Quality Control

Our 2-(5-tert-Butyl-2-Hydroxyphenyl)Benzotriazole 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) documenting these results is provided with each shipment to guarantee traceability and compliance with your quality 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 strong oxidizing agents. Under these conditions, the product remains stable for extended periods.

Specification

Item	Specification
Appearance	Off-white to pale yellow crystalline powder
Identification (IR)	Conforms to reference spectrum
Assay (HPLC)	≥ 98.5%
Melting Point	138°C - 142°C
Loss on Drying	≤ 0.5%
Residue on Ignition	≤ 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.