RICHARD MEGNA / FUNDAMENTAL PHOTOS / SCIENCE PHOTO LIBRARY RICHARD MEGNA / FUNDAMENTAL PHOTOS / SCIENCE PHOTO LIBRARY
A solution of ammonium hexacyanoferrate (III), formed by the reaction between iron (III) sulphate and ammonium thiocyanate. The reaction causes a colour change from yellow to red, the complex ion hexacyanoferrate (III) being formed. A500/094).
Model release not required. Property release not required.