abstract |
Fumed silica for use as auxiliary substances in pharmaceutical compositions and cosmetic compositions, - 90~400m BET surface area of 2 / g - As the content of less than 1ppm for each element, Cd, Cr, Pb, Sb and Se as well as less than 5 ppm Hg, all elements are measured by inductively coupled plasma-atomic emission spectroscopy (ICP-AES) or atomic absorption spectroscopy (AAS). |