An element that is a member of the chalcogen family. It has an atomic symbol S, atomic number 16, and atomic weight [32.059; 32.076]. It is found in the amino acids cysteine and methionine.

The chalcone C ring closes into a 5 instead of the more typical 6 membered ring leaving a phenyl methane at the 2 position instead of the typical phenyl.

Acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size