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By certification 
| Trade Name | Ultraviolet Absorbent UV-328 |  |
| Chemical Name | 2-(2'-Hydroxy-3',5'-di-tert-pentylphenyl)-benzotriazole | |
| CAS NO. | 25973-55-1 | |
| Molecular Formula | C22H29N3O | |
| Structural Formula |
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| Appearance | Light Yellow Powder | |
| Melting Point | ≥ 81°C | |
| Volatile | ≤0.5% | |
| Ash | ≤0.05% | |
| Content | ≥99% | |
| Transmittance | 460nm≥97%; 500nm≥98% | |
| Application & Usage | It is a pale yellowish powder melting point 81°C, soluble in benzene, toluene, ethyl acetate and petroleum ether, slightly soluble in ethyl alcohol and methyl alcohol insoluble in water. It is a excellent ultraviolet absorbent, UV max: 345nm, solubility for polymer is good, volatility is little, mainly used for PE, PP,PS,PVC, poly ester and ABS resins, and so on. | |
