Clear glas reagent bottle labelled 'AMMONIUM MOLYBDATE', 1930.
© Science Museum / Science & Society Picture Library
Reagent bottle with an embosed, fired label and a ground glas stopper. A reagent is a substance or mixture used in chemical analysis. Many laboratory chemicals are stored in this type of bottle. Ammonium Molybdate ((NH4)6Mo7O24.4H2O) forms a clear solution. It has industrial applications in the metalworking and petrochemicals industries.