SCIENCE PHOTO LIBRARY SCIENCE PHOTO LIBRARY
Three ceramic dishes each containing burning ethanol. Each dish has a different colour flame due to chemicals that have been added to the ethanol. Here they are (left to right): sodium chloride (yellow), potassium chloride (pale lilac) and barium sulphate (pale green). The colour of the flame is different for different elements and can be used to identify unknown substances.
Model release not required. Property release not required.