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Benzotriazole Based Ultraviolet Absorbers

PowerSorb™ 326

2-(2’-hydroxy-3’-t-butyl-5’-methylphenyl)-5-chlorobenzotriazole.
Synonym: 2-tert-butyl-6-(5-chloro-2H-benzotriazol-2-yl)-4-methylphenol
Chemical Structure
Introduction / Features
PowerSorb™ 326 is a UV absorber of the hydroxyphenylbenzotriazole class, which imparts outstanding light stability to plastics and other organic substrates.
Physical Properties
Chemical Name: 2-(2’-hydroxy-3’-t-butyl-5’-methylphenyl)-5-chlorobenzotriazole
CAS No.: 3896-11-5
EINECS No.: 223-445-4
Formula: C17H18 N3OCl
Molecular Weight: 316
Density(20°C): 1.32g/cm3
Melting Point(°C): 138-142°C
Flash Point(°C): 238°C DIN 51584
Vapor Pressure(20°C): 7.5E-7Pa
Volatile Loss(%): Max.0.5
Color of Solution 460nm(%): Min.97
Color of Solution 500nm(%): Min.98
Appearance: Pale Yellow Powder
Ash(%): Max.0.1
Min. Purity: 99%

Solubility (20°C) % w/w
Acetone: 1.0
Benzene: 10.5
Chloroform: 11.0
Cyclohexane: 6.4
Ethanol: 0.1
Ethyl acetate: 2.0
n-Hexane: 1.0
Methanol: 0.1
Dichloromethane: 4.3
Toluene: 11.3
MEK: 13.3
Styrene: 12.0
Mineral spirits: 1.5
Water: <0.01

Applications
PowerSorb™ 326 is especially suited for polyolefins and cold cured polyesters.
Packings
PowerSorb™ 326 is supplied in 20Kg cartons or drums.
Technical Library
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