2-(2'-hydroxy-5'-tert-octylphenyl) benzotriazole;
2-(2H-benzotriazol-2-yl)-4-(1,1,3,3-tetramethylbutyl)phenol
PowerSorb™ 329 is a benzotriazole type ultraviolet light absorber (UVA), imparting good light stability for plastics and other organic polymers.
| Synonyms | Tinuvin 329, Uvinul 3029, Omnistab 329, Songsorb 3290PW, Cyasorb UV-5411, Lowilite 29, Eversorb 72, Chiguard 5411, EVERSTAB 329/5411. |
CAS Number | 3147-75-9 |
EINECS Number | 221-573-5 |
Chemical Structure |
|
Chemical Formula | C20H25N3O |
Molecular Weight | 323 |
Packing | PowerSorb™ 329 is supplied in 25Kg Carton Box. |
Note | All information in the leaflet is based on our present knowledge and experience. We reserve the right to make any changes according to technological progress or further developments. Performance of the product described herein should be verified by testing. We specifically disclaim any other express or implied warranty of fitness for a particular purpose or merchantability. We disclaim liability for any incidental or consequential damages. |
PowerSorb™ 329 protects polymers from UV radiation, helping to preserve the original appearance and physical integrity of molded articles, films, sheets and fibers during outdoor weathering.
PowerSorb™ 329 provides effective light stabilization and prevents the yellowing and degradation of polymers such as polycarbonate, unsaturated polyesters, and acrylics.
PowerSorb™ 329 can be used in combination with phenolic & phosphite antioxidants, and HALS to optimize performance in outdoor use.
Appearance | White powder |
Specific Gravity [25°C] | 1.18 |
Melting Point (°C) | 102-106 |
Volatile Loss (%) | Max.0.5 |
Color of solution (460nm, %) | Min.97 |
Color of solution (500nm, %) | Min.98 |
Ash (%) | Max.0.1 |
Purity (%) | Min.99 |
Solubility [25°C] | % w/w |
3-A Alcohol | 0.7 |
Benzene | 65 |
n-Butanol | 2 |
Dioctyl phthalate | 15 |
Ethanol | 0.6 |
Ethyl acetate | 27.2 |
n-Heptane | 8.1 |
Methyl cellosolve | 5 |
Methylene Chloride | 70.9 |
Methyl methacrylate | 12 |
Styrene | 22 |
Xylene | 50 |
Water | <0.01 |
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PowerSorb 329 Benzotriazole UV Absorber 3147 75 9 
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