Appearance pale yellow crystalline powder Melting point(¡æ) 46.5 ~ 49 Ash content£¨%£© ¨q0.10 Volatile loss (%) ¨q0.50 Transmittance(440nm) (%) ¨r79.0 Transmittance(460nm) (%) ¨r89.0 Assay£¨%£© ¨r99.0 Tancals 531 is a benzophenone light stabilizer, capable of absorbing the uv Radiation of 240-340nm wavelength. It is of light color, non-toxicity, good Compatibility, small mobility and easy processing. It is widely applied to Pe, pvc, pp, ps, pc organic glass, pp fiber, ethylene-vinyl acetate etc. Moreover, it has very good light-stability on drying phenol aldehyde, varnish of Alcohol, polyurethane, acrylate, etc. 20kg/pc