Chemicalname:

Structural formula:

It is also named No. 3 sunscreen agent (UV-284,BP-4),it is a broad-spectrum ultraviolet radiation absorber with high efficiency, no toxicity or side effects,good thermal stability.It can absorb both the UV-A and UV-B.

1.Molecular formula:C₁₄H₁₂O₆S
2.Molecular weight:308.31
3.CAS NO.:[4065-45-6]
4.Appearance:white or light yellow powder
5.M.P.:≥140°C
6.Drying loss:≤5.0ŁĽ≤3.0ŁĽ
7.Assay:≥99.0ŁĽ
8.PH:1.2-2.2
9.Water-solution turbidity:≤4.0 EBC
10.Color apha :≤2.0
11.Heavy metal:≤5ppm
12.Specific absorptivity(285nm):(325nm):≥460 ≥290
13.Non-toxic: not irritative to human skin
14.Packing:cardboard drum25kg/drum
15.Storage: avoid light and be sealed