AW Hyflo Super Cel, or silica, can be found within nature as amethyst, agate, cristobalite, chalcedony, flint, quartz, sand, and tridymite. It is a naturally occurring compound of both oxygen and silicon. It can appear as a transparent or gray powder with no odor, and can irritate the eyes and skin when contacted. The compound can also irritate the respiratory tract when inhaled. Silica has a molecular weight of 60.083 g/mol and a heavy atom count of 3. It also has a hydrogen bond donor count of zero and a hydrogen bond acceptor count of two. The complexity of the compound is 18.3. It also has both a monoisotopic and exact mass of 59.967 g/mol. Silica has a melting point of 3,110°F (1,710°C) and is not soluble in any other compound. It has a density of 2.2 at 77°F (25°C). The boiling point of silica is 4,046°F (2,230°C). The compound is often used as a food additive to work as an anti-caking device. It is also used for the same purpose in pharmaceutical drugs and vitamins.