Appearance :white or light yellow crystal powder
Melting point :142.0-146.0 ℃
Loss on drying : ≤ 0.1%
Content : ≥ 99.0%
PH value : 6
Chroma : ≤ 3.0
Heavy metal : ≤ 5ppm
Specific absorptivity(290nm) : ≥ 630
Ash : ≤ 0.5%
Nontoxicity: no thrill for skin.
Packing :paper drum 25kg/ drum
Storage: airproof and avoid light
Use :mainly used as light stabilizing agent for plastic, and can protect organic glass and fabric. It is still used as intermediates of synthesizing other ultraviolet absorbents.
Valid period :2 years