Description

2-tert-Butyl-6-(5-Chloro-1,3-Dihydro-Benzotriazol-2-Yl)-4-Methyl-Phenol is a specialized phenolic compound that functions as a highly effective light stabilizer and antioxidant. This chemical is critical for protecting polymers and coatings from degradation caused by UV radiation and thermal oxidation, thereby extending product lifespan and maintaining performance integrity. It is an essential additive for manufacturers in the plastics, synthetic resins, and high-performance coating industries seeking to enhance the durability of their materials.

Application

• Polymer Stabilization: Primary use as a light stabilizer (HALS-type) and antioxidant in polyolefins (PP, PE), PVC, and engineering plastics to prevent photo-oxidative degradation.
• Protective Coatings: Incorporated into automotive paints, industrial coatings, and wood varnishes to inhibit yellowing, gloss loss, and chalking caused by UV exposure.
• Adhesives and Sealants: Enhances the long-term stability and weatherability of adhesive formulations and sealants used in construction and automotive applications.
• Synthetic Fibers: Used as an additive in the production of synthetic fibers like polypropylene to improve resistance to sunlight and environmental aging.
• Agricultural Films: A key component in greenhouse and mulch films to stabilize the polymer matrix against prolonged solar radiation.
• Elastomers and Rubber: Protects rubber products from ozone and UV-induced cracking, preserving elasticity and mechanical properties.

Basic Information

Product Name	2-tert-Butyl-6-(5-Chloro-1,3-Dihydro-Benzotriazol-2-Yl)-4-Methyl-Phenol
CAS No.	139724-05-3
Molecular Formula	C17H18ClN3O
Molecular Weight	315.80 g/mol
Synonyms	5-Chloro-2-(2-hydroxy-3-tert-butyl-5-methylphenyl)-2H-benzotriazole; 2-(5-Chloro-2H-benzotriazol-2-yl)-6-tert-butyl-4-methylphenol; Phenol, 2-(5-chloro-2H-benzotriazol-2-yl)-6-(1,1-dimethylethyl)-4-methyl-; UV-326 (common trade name); Light Stabilizer 326; 2-(2'-Hydroxy-3'-tert-butyl-5'-methylphenyl)-5-chlorobenzotriazole; 5-Chloro-2-(3-tert-butyl-2-hydroxy-5-methylphenyl)-2H-benzotriazole; Benzotriazole UV Absorber 326
EINECS	Contact for details

Quality Control

Our production of 2-tert-Butyl-6-(5-Chloro-1,3-Dihydro-Benzotriazol-2-Yl)-4-Methyl-Phenol adheres to stringent quality management systems. Every batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure compliance with industry specifications for polymer additives. Certificates of Analysis (COA) detailing purity, melting point, and specific absorbance are available upon request to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). This material is light-sensitive (store away from light) and easily oxidized (store under inert atmosphere). Keep away from strong oxidizing agents and incompatible materials.

Specification

Item	Specification
Appearance	Light yellow to pale beige crystalline powder
Identification (IR)	Conforms to reference spectrum
Melting Point	138°C - 142°C
Assay (HPLC)	≥ 98.5%
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.