Description

Methyl 3-[3-tert-Butyl-4-Hydroxy-5-(5-Chloro-2H-Benzotriazol-2-Yl)Phenyl]Propionate is a high-performance, hindered phenolic benzotriazole derivative that functions as a highly effective light stabilizer and antioxidant. This compound is engineered to provide superior protection against UV degradation and thermal oxidative stress in polymer systems. It is a critical additive for manufacturers in the plastics, coatings, and synthetic fiber industries seeking to enhance the durability and longevity of their products under demanding environmental conditions.

Application

• Polymer Stabilization: Primary use as a light stabilizer (UV absorber) and antioxidant in polyolefins (PP, PE), PVC, polyurethanes, and engineering plastics to prevent yellowing, embrittlement, and loss of mechanical properties.
• Coatings and Paints: Protects industrial, automotive, and architectural coatings from UV-induced gloss loss, chalking, and color fading, extending coating life.
• Adhesives and Sealants: Enhances the weatherability and service life of adhesive films and sealant formulations exposed to sunlight.
• Synthetic Fibers: Incorporated into fibers for outdoor textiles, automotive interiors, and geotextiles to improve resistance to sunlight degradation.
• Photographic and Optical Materials: Used in specialty applications to protect light-sensitive layers and optical components.
• Masterbatch Production: A key active component in concentrated additive masterbatches for simplified and consistent compounding in plastic processing.

Basic Information

Product Name	Methyl 3-[3-tert-Butyl-4-Hydroxy-5-(5-Chloro-2H-Benzotriazol-2-Yl)Phenyl]Propionate
CAS No.	83044-91-1
Molecular Formula	C20H22ClN3O3
Molecular Weight	387.86 g/mol
Synonyms	Methyl 3-(3-tert-butyl-4-hydroxy-5-(5-chloro-2H-benzotriazol-2-yl)phenyl)propionate; UV Absorber 384; 2-[2-Hydroxy-3-tert-butyl-5-(3-methoxycarbonylpropyl)phenyl]-5-chlorobenzotriazole; 5-Chloro-2-(3-tert-butyl-2-hydroxy-5-methoxycarbonylpropylphenyl)-2H-benzotriazole; Tinuvin 384; BLS 384; Light Stabilizer 384; 2-(2'-Hydroxy-3'-tert-butyl-5'-(3''-methoxycarbonylpropyl)phenyl)-5-chlorobenzotriazole
EINECS	Contact for details

Quality Control

Our production of Methyl 3-[3-tert-Butyl-4-Hydroxy-5-(5-Chloro-2H-Benzotriazol-2-Yl)Phenyl]Propionate adheres to a stringent quality management system. Every batch is analyzed using advanced techniques like HPLC, GC, and NMR to ensure high purity and consistent performance. Certificates of Analysis (COA) detailing identity, assay, impurity profile, and physical properties are provided and can be tailored to meet specific customer or regulatory 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. Under these conditions, the product remains stable for extended periods.

Specification

Item	Specification
Appearance	Off-white to light yellow crystalline powder
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 98.5%
Melting Point	138 - 142 °C
Loss on Drying	≤ 0.5%
Residue on Ignition	≤ 0.1%
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Individual impurity ≤ 0.5%; Total impurities ≤ 1.0%

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