BP-4(Benzophenone UV Absorber )
Chemical name: 2-hydroxyl-4-methoxylbenzophenone-5-sulfonic acid
Introduction : BP-4 is a benzophenone type ultraviolet light absorber (UVA), BP-4 is suitable for sun screen cosmetics.
Molecular Formula : C14H12SO6 CAS NO : 4065-45-6
Appearance : off-white powder or crystalline powder.
Assay:≥99% Melting point：≥140℃
Loss on drying: ≤5.0% Heavy metal:≤5ppm
UV absorbance(1%) E-value: 285nm≥460 325nm≥290
Application: BP-4 also called sun screener No.3 is a widely used UV-absorbers, it’s non-toxic, without irradiation for human skin. It has high efficient absorbance, good resistance to light, it can absorb UV-A and UV-B at the same time, it is approved by FDA as I class sun screener, widely used in Europe and America, mainly used in suntan cream and some sun screen cosmetics.
Packing：BP-4 is available in powder form in 25kg carton, net weight, with an inner PE liner or 25kg fiber drum