Description

2-(2'-Hydroxy-4'-Benzoyloxyphenyl)-5-Chlorobenzotriazole is a high-performance ultraviolet (UV) light absorber belonging to the hydroxyphenyl benzotriazole class. This compound is engineered to provide exceptional photostability and longevity to polymeric materials by effectively absorbing and dissipating harmful UV radiation. It is a critical additive for formulators and manufacturers in the plastics, coatings, and specialty chemical industries seeking to enhance the durability and weatherability of their products.

Application

• Primary UV stabilizer for engineering plastics such as polycarbonate (PC), polyesters (PET, PBT), and polyamides (nylons).
• Key additive in high-performance industrial coatings, automotive paints, and wood finishes to prevent gloss loss, chalking, and color fading.
• Enhances the outdoor lifespan of plastic films, sheets, and profiles used in construction and agricultural applications.
• Used in the stabilization of adhesives, sealants, and synthetic fibers against photodegradation.
• Formulation component in cosmetic and personal care products requiring UV protection, often in combination with other filters.
• Provides light protection for sensitive pharmaceutical intermediates and specialty chemicals during processing and storage.

Basic Information

Product Name	2-(2'-Hydroxy-4'-Benzoyloxyphenyl)-5-Chlorobenzotriazole
CAS No.	169198-72-5
Molecular Formula	C20H12ClN3O3
Molecular Weight	377.78 g/mol
Synonyms	UV-360; 5-Chloro-2-(2-hydroxy-4-benzoyloxyphenyl)-2H-benzotriazole; 2-(2H-Benzotriazol-2-yl)-4-(benzoyloxy)phenyl 5-chloro; 2-(2'-Hydroxy-4'-benzoyloxyphenyl)-5-chlorobenzotriazole; 5-Chloro-2-(2-hydroxy-4-benzoyloxyphenyl)benzotriazole; BLS 360; Light stabilizer 360; Benzotriazole UV absorber 360
EINECS	Contact for details

Quality Control

Our production of 2-(2'-Hydroxy-4'-Benzoyloxyphenyl)-5-Chlorobenzotriazole adheres to a strict quality management system to ensure batch-to-batch consistency and high purity. Each lot is analyzed against stringent internal specifications using advanced techniques like HPLC, GC, and NMR. A comprehensive Certificate of Analysis (COA) detailing purity, identity, and key physical parameters is provided with every 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 oxidizing agents and heat sources. Under these conditions, the product remains stable for extended periods.

Specification

Item	Specification
Appearance	Light yellow to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.5%
Melting Point	138 - 142 °C
Loss on Drying	≤ 0.5%
Residue on Ignition	≤ 0.1%
Heavy Metals (as Pb)	≤ 10 ppm

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