Tetra-ethyl-2,2’-(1,4-phenylene-dimethylidene)-bismalonate
Powersorb™ 988 is a Solid Benzylidene Malonate UV-Absorber.
| Synonyms | Omnistab 988, HOSTAVIN B CAP/N321/PR31, Eversorb 56. |
CAS Number | 6337-43-5 |
EINECS Number | 228-726-5 |
Chemical Structure |
|
Chemical Formula | C22H26O8 |
Molecular Weight | 418 |
Packing | Powersorb™ 988 is supplied in 50Kg Fiber Drum with laminated in liner. |
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™ 988 is recommended as UV absorber for plastic materials, particularly engineering plastics such as polycarbonate and polyesters. It can be equally used also in PVC, styrenics, etc.
Appearance | White to off-white Powder |
Hazen Color Number | Max.50 |
Melting Point (°C) | 137-140 |
Purity (%) | Min.99 |
Transmission (425nm, %) | Min.93 |
Transmission (500nm, %) | Min.97 |
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PowerSorb 988 Benzylidene Malonate UV Absorber 6337 43 5 
