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By certification 
| Trade Name | Ultraviolet Absorbent UV-531 |  |
| Chemical Name | 2-Hydroxy-4-n-Octoxy Benzophenone | |
| CASÂ NO. | 3147-75-9 | |
| Molecular Formula | C21H26O3 | |
| Molecular Weight | 326 | |
| Structural Formula | Â
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| Appearance | Light yellow crystalline powder | |
| Melting Point | 47°C -49°C | |
| Content | ≥99.0% | |
| Loss on drying | ≤0.3% | |
| Transmittance | 450nm,≥90%  500nm,≥95% | |
| Application & Usage | This product is a light stabilizer with good performance, capable of absorbing the UV radiation of 240-340 nm wave length with the characteristics of light color, non-toxic, good compatibility, small mobility, easy processing etc. It can protect the polymer to its maximum extent, helps to reduce the color. It can also delay the yellowing and obstacle the loss of its physical function. It is widely applied to PE, PVC, PP, PS, PC organic glass, polypropylene fiber, ethylene-vinyl acetate etc. | |
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