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Benzotriazole Based Ultraviolet Absorbers

PowerSorb™ 327

2-(2’-Hydroxy-3’,5’-di-t-butylphenyl)-5-chlorobenzotriazole.
Synonym: 2,4-di-tert-butyl-6-(5-chlorobenzotriazol-2-yl)phenol
Chemical Structure
Introduction / Features
PowerSorb™ 327 is a strong absorber of ultraviolet radiation and has a high degree of photostability - photochemical energy absorbed in the ultraviolet region is dissipated as thermal energy.
Physical Properties
Chemical Name: 2-(2’-Hydroxy-3’,5’-di-t-butylphenyl)-5-chlorobenzotriazole
CAS No.: 3864-99-1
EINECS No.: 223-383-8
Formula: C20H24N3OCl
Molecular Weight: 358
Specific Gravity [25°C, g/cm3]: 1.26
Melting Point(°C): 154-158
Flash Point(°C): 454
Vapor Pressure(20°C): 8.2E-9
Volatile Loss(%): Max.0.5
Color of Solution 460nm(%): Min.95
Color of Solution 500nm(%): Min.97
Appearance: Pale Yellow Powder
Ash(%): Max.0.1
Min. Purity: 99%

Solubility (20°C) % w/w
Xylene: 15
n-Butyl acetate: 7
Mineral spirits: 5
Methyl methacrylate: 14
Ethanol: 0.3
Ethyl acetate: 6
n-Hexane: 3
Dioctyl phthalate: 3
Toluene: 16
Methyl ethyl ketone: 4
Styrene: 14
Water: <0.01

Applications
PowerSorb™ 327 is particulary suitable for polypropylene and polyethylene as well as cold cured polyesters, polyurethanes, dyes, and pigments.
PowerSorb™ 327 can be used in combination with phenolic & phosphite antioxidants, and HALS to optimize performance in outdoor use.
PowerSorb™ 327 exhibits good initial color, low volatility, excellent stability to heat and light, superior wash fastness, and resistance to gas fading.
PowerSorb™ 327 almost does not absorb visible light, particularly applicable to colorless and light-colored products.
Packings
PowerSorb™ 327 is supplied in 25Kg carton box or 50kg fiber drum.
Technical Library
Download Technical Data Sheet Safety Data Sheet

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