Sulphur dioxide. Computer model of a molecule of sulphur dioxide (SO2). Atoms are represented as spheres and are colour-coded: sulphur (yellow) and oxygen (red). Sulphur dioxide is a colourless acidic gas that is produced when sulphur is burnt in air or pure oxygen. Due to the burning of fuels containing sulphur, sulphuric acid is a major component of acid rain.
Model release not required. Property release not required.